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NursIIIT2keypoints
Nursing III test 2 key points
| Question | Answer |
|---|---|
| Chapter 45: | Nursing Assessment: Urinary System |
| The urinary system | consists of two kidneys, two ureters, a urinary bladder, and a urethra. |
| The bladder provides | storage, and the ureters and urethra are the drainage channels for the urine after it is formed by the kidneys. |
| The primary functions of the kidneys are | (1) to regulate the volume and composition of extracellular fluid (ECF), and (2) to excrete waste products from the body. |
| The kidneys function | to control blood pressure, produce erythropoietin, activate vitamin D, and regulate acid-base balance. |
| The outer layer of the kidney | is termed the cortex, and the inner layer is called the medulla. |
| The nephron | is the functional unit of the kidney. Each kidney contains 800,000 to 1.2 million nephrons. |
| A nephron | is composed of a glomerulus, Bowman’s capsule, and a tubular system. The tubular system consists of the proximal convoluted tubule, the loop of Henle, the distal convoluted tubule, and a collecting tubule. |
| The kidneys | receive 20% to 25% of cardiac output. |
| The primary function of the kidneys | is to filter the blood and maintain the body’s internal homeostasis. |
| Urine formation | is the result of a multistep process of filtration, reabsorption, secretion, and excretion of water, electrolytes, and metabolic waste products. |
| Glomerular Function | Blood is filtered in the glomerulus. |
| The hydrostatic pressure of the blood within the glomerular capillaries | causes a portion of blood to be filtered across the semipermeable membrane into Bowman’s capsule. |
| The ultrafiltrate is similar in composition to blood except | that it lacks blood cells, platelets, and large plasma proteins. |
| The amount of blood filtered by the glomeruli | in a given time is termed the glomerular filtration rate (GFR). The normal GFR is about 125 ml/min. |
| The functions of the tubules and collecting ducts include | reabsorption&secretion.Reabsorption is passage of substance from lumen of tubules through tubule cells and into the capillaries. Tubular secretion is the passage of a substance from the capillaries through the tubular cells into the lumen of the tubule. |
| The loop of Henle is important in | conserving water and thus concentrating the filtrate. In the loop of Henle, reabsorption continues. |
| Two important functions of the distal convoluted tubules | are final regulation of water balance and acid-base balance. |
| Antidiuretic hormone (ADH) | is required for water reabsorption in the kidney. |
| Aldosterone acts on the distal tubule | to cause reabsorption of sodium ions (Na+) and water. In exchange for Na+, potassium ions (K+) are excreted. |
| Acid-base regulation | involves reabsorbing and conserving most of the bicarbonate (HCO3) and secreting excess H+. |
| Atrial natriuretic peptide (ANP) | acts on the kidneys to increase sodium excretion. |
| Parathyroid hormone (PTH) | acts on renal tubules to increase reabsorption of calcium. |
| The kidneys produce erythropoietin in response | to hypoxia and decreased renal blood flow. Erythropoietin stimulates the production of red blood cells (RBCs) in the bone marrow. |
| Vitamin D | is activated in kidneys. Important for calcium balance and bone health. |
| Renin, which is produced and secreted by juxtaglomerular cells, | is important in the regulation of blood pressure. |
| Prostaglandin (PG) synthesis | (primarily PGE2 and PGI2) occurs in the kidney, primarily in the medulla. These PGs have a vasodilating action, thus increasing renal blood flow and promoting Na+ excretion. |
| The ureters | are tubes that carry urine from the renal pelvis to the bladder. |
| Circular and longitudinal smooth muscle fibers, | arranged in a meshlike outer layer, contract to promote the peristaltic one-way flow of urine. |
| The urinary bladder | is a distensible organ positioned behind the symphysis pubis and anterior to the vagina and rectum. |
| Bladder primary functions | are to serve as a reservoir for urine and to help the body eliminate waste products. |
| Normal adult urine output | is approximately 1500 ml/day, which varies with food and fluid intake. |
| On the average, 200 to 250 ml of urine in the bladder | causes moderate distention and the urge to urinate. |
| The urethra | is a small muscular tube that leads from the bladder neck to the external meatus. |
| The primary function of the urethra | is to serve as a conduit for urine from the bladder neck to outside the body during voiding. |
| The female urethra | is significantly shorter than that of the male. |
| Together, the bladder, urethra, and pelvic floor muscles form | the urethrovesical unit. It receives neuronal input from the autonomic nervous system.Normal voluntary control of this unit is defined as continence. |
| Any disease or trauma that affects function of the brain, spinal cord, or nerves that directly innervate | the bladder, bladder neck, external sphincter, or pelvic floor can affect bladder function. |
| By the seventh decade of life, | 30% to 50% of glomeruli have lost their function. |
| Atherosclerosis has been found to accelerate | the decrease of renal size with age. |
| Older individuals maintain body fluid homeostasis | unless they encounter diseases or other physiologic stressors. |
| Subjective data:Past health history | pt is asked about presence/history of diseases that are related to renal/urologic probs.Diseases include HTN,diabetes mellitus,gout&metabolic,connective tissue(systemic lupus erythematosus),skin/URI of strep,TB,HEP,congenital, neurologic(stroke),trauma |
| Medications: | an assessment of the patient’s current and past use of medications is important. This should include over-the-counter drugs, prescription medications, and herbs. Many drugs are known to be nephrotoxic. |
| Surgery or other treatments: | the patient is asked about any previous hospitalizations related to renal or urologic diseases and all urinary problems during past pregnancies. Past surgeries, particularly pelvic surgeries, or urinary tract instrumentation is documented. |
| Objective data:Physical examinationInspection: the nurse should assess for changes in the following: | mouth, skin, face & extremities, abdomen, weigh,general state. |
| Skin: | pallor, yellow-gray cast, excoriations, changes in turgor, bruises, texture (e.g., rough, dry skin) |
| Mouth: | stomatitis, ammonia breath odor |
| Face and extremities: | generalized edema, peripheral edema, bladder distention, masses, enlarged kidneys |
| Abdomen: | striae, abdominal contour for midline mass in lower abdomen (may indicate urinary retention) or unilateral mass (occasionally seen in adult, indicating enlargement of one or both kidneys from large tumor or polycystic kidney) |
| Weight: | weight gain secondary to edema; weight loss and muscle wasting in renal failure |
| General state of health: | fatigue, lethargy, and diminished alertness |
| Palpation: | A landmark useful in locating the kidneys is the costovertebral angle (CVA) formed by the rib cage and the vertebral column. |
| The normal-size kidney | is usually not palpable. |
| If the kidney is palpable, | its size, contour, and tenderness should be noted. Kidney enlargement is suggestive of neoplasm or other serious renal pathologic condition. |
| The urinary bladder | is normally not palpable unless it is distended with urine. |
| Percussion: | Tenderness in the flank area may be detected by fist percussion (kidney punch). |
| Normally a firm blow in the flank area | should not elicit pain. |
| Normally a bladder is not percussible | until it contains 150 ml of urine. If the bladder is full, dullness is heard above the symphysis pubis. A distended bladder may be percussed as high as the umbilicus. |
| Auscultation: | With a stethoscope the abdominal aorta and renal arteries are auscultated for a bruit (an abnormal murmur), which indicates impaired blood flow to the kidneys. |
| Urinalysis. | This test may provide information about possible abnormalities, indicate what further studies need to be done, and supply information on the progression of a diagnosed disorder. |
| Creatinine clearance. | Because almost all creatinine in the blood is normally excreted by the kidneys, creatinine clearance is the most accurate indicator of renal function. The result of a creatinine clearance test closely approximates that of the GFR. |
| Urodynamic tests | study the storage of urine within the bladder and the flow of urine through the urinary tract to the outside of the body. |
| Chapter 46: | Nursing Management: Renal and Urologic Problems |
| Urinary tract infections (UTIs) | are the second most common bacterial disease, and the most common bacterial infection in women. |
| UTIs | include cystitis, pyelonephritis, and urethritis. |
| Risk factors for UTIs | include pregnancy, menopause, instrumentation, and sexual intercourse. Escherichia coli (E. coli) is the most common pathogen causing a UTI. |
| UTIs that are hospital-acquired | are called nosocomial infections. |
| UTI symptoms | include dysuria, frequent urination (more than every 2 hours), urgency, and suprapubic discomfort or pressure. Flank pain, chills, and the presence of a fever indicate an infection involving the upper urinary tract (pyelonephritis). |
| UTIs are diagnosed | by dipstick urinalysis to identify the presence of nitrites (indicating bacteriuria), WBCs, and leukocyte esterase (an enzyme present in WBCs indicating pyuria). A voided midstream technique yielding a clean-catch urine sample is preferred. |
| Trimethoprim-sulfamethoxazole (TMP-SMX) or nitrofurantoin (Macrodantin) | is often used to empirically treat uncomplicated or initial UTIs. Additional drugs may be used to relieve discomfort. |
| Health promotion activities include teaching preventive measures such as | (1) emptying the bladder regularly and completely, (2) evacuating the bowel regularly, (3) wiping the perineal area from front to back after urination and defecation, and (4) drinking an adequate amount of liquid each day. |
| Pyelonephritis | is an inflammation of the renal parenchyma and collecting system (including the renal pelvis). The most common cause is bacterial infection which begins in the lower urinary tract. Recurring infection can result in chronic pyelonephritis. |
| Pyelonephritis Clinical manifestations | vary from mild fatigue to the sudden onset of chills, fever, vomiting, malaise, flank pain, and the lower UTI characteristics. |
| Pyelonephritis Interventions include teaching about the disease process with emphasis on | (1) the need to continue drugs as prescribed, (2) the need for a follow-up urine culture to ensure proper management, and (3) identification of risk for recurrence or relapse. |
| Interstitial cystitis | (IC) is a chronic, painful inflammatory disease of the bladder characterized by symptoms of urgency/frequency and pain in the bladder and/or pelvis. |
| Immunologic processes involving the urinary tract predominantly affect | the renal glomerulus (glomerulonephritis). |
| Clinical manifestations of glomerulonephritis | include varying degrees of hematuria (ranging from microscopic to gross) and urinary excretion of various formed elements, including RBCs, WBCs, proteins, and casts. |
| Acute poststreptococcal glomerulonephritis (APSGN) | develops 5-21days postinfection of tonsils,pharynx,skin(streptococcal sore throat,impetigo)by nephrotoxic strains of group A hemolytic streptococci.Symptoms:edema,HTN,oliguria, hematuria with a smoky or rusty appearance, and proteinuria. |
| APSGN management | focuses on symptomatic relief. This includes rest, edema and hypertension management, and dietary protein restriction when an increase in nitrogenous wastes (e.g., elevated BUN value) is present. |
| One of the most important ways to prevent the development of APSGN | is to encourage early diagnosis and treatment of sore throats and skin lesions. |
| Goodpasture syndrome | is a rare autoimmune disease characterized by the presence of circulating antibodies against glomerular and alveolar basement membrane. |
| Rapidly progressive glomerulonephritis (RPGN) | is glomerular disease associated with acute renal failure where there is rapid, progressive loss of renal function over days to weeks. |
| Chronic glomerulonephritis | is a syndrome that reflects the end stage of glomerular inflammatory disease. It is characterized by proteinuria, hematuria, and development of uremia. Treatment is supportive and symptomatic. |
| Nephrotic syndrome | results when the glomerulus is excessively permeable to plasma protein, causing proteinuria that leads to low plasma albumin and tissue edema. |
| Nephrotic syndrome is associated with systemic illness | such as diabetes or systemic lupus erythematosus. |
| Nephrotic syndrome Treatment | is focused on symptom management. |
| Nephrotic syndrome major nursing interventions | for a patient with nephrotic syndrome are related to edema. Edema is assessed by weighing the patient daily, accurately recording intake and output, and measuring abdominal girth or extremity size. |
| Factors involved in the development of urinary stones | include metabolic, dietary, genetic, climatic, lifestyle, and occupational influences. Other factors are obstruction with urinary stasis and urinary tract infection. |
| The five major categories of stones (lithiasis) are | (1) calcium phosphate, (2) calcium oxalate, (3) uric acid, (4) cystine, and (5) struvite. |
| Urinary stones cause clinical manifestations | when they obstruct urinary flow. Common sites of complete obstruction are at the UPJ (the point where the ureter crosses the iliac vessels) and at the ureterovesical junction (UVJ). |
| Management of a patient with renal lithiasis | consists of treating the symptoms of pain, infection, or obstruction. |
| Lithotripsy | is used to eliminate calculi from the urinary tract. Outcome for lithotripsy is based on stone size, stone location, and stone composition. |
| The goals are that the patient with urinary tract calculi will have | (1) relief of pain, (2) no urinary tract obstruction, and (3) an understanding of measures to prevent further recurrence of stones. |
| To prevent stone recurrence, | the patient should consume an adequate fluid intake to produce a urine output of approximately 2 L/day. Additional preventive measures focus on reducing metabolic or secondary risk factors. |
| A stricture | is a narrowing of the lumen of the ureter or urethra. Ureteral strictures can affect the entire length of the ureter. |
| A urethral stricture | is the result of fibrosis or inflammation of the urethral lumen. |
| Causes of urethral strictures | include trauma, urethritis, iatrogenic, or a congenital defect. |
| urethral stricture Clinical manifestations | associated with a urethral stricture include a diminished force of the urinary stream, straining to void, sprayed stream, postvoid dribbling, or a split urine stream. |
| Renal Vascular problems involving the kidney include | (1) nephrosclerosis, (2) renal artery stenosis, and (3) renal vein thrombosis. |
| Renal artery stenosis | is a partial occlusion of one or both renal arteries and their major branches due to atherosclerotic narrowing. The goals of therapy are control of BP and restoration of perfusion to the kidney. |
| Polycystic kidney disease (PKD) | is the most common life-threatening genetic disease. It is characterized by cysts that enlarge and destroy surrounding tissue by compression. |
| Polycystic kidney disease (PKD Diagnosis | is based on clinical manifestations, family history, IVP, ultrasound (best screening measure), or CT scan. |
| Diabetic nephropathy | is the primary cause of end-stage renal failure in the United States. Diabetes mellitus affects the kidneys by causing microangiopathic changes. |
| Systemic sclerosis (scleroderma) | is a disease of unknown etiology characterized by widespread alterations of connective tissue and by vascular lesions in many organs. |
| Gout, | a syndrome of acute attacks of arthritis caused by hyperuricemia, can also result in significant renal disease. |
| Systemic lupus erythematosus | is a connective tissue disorder characterized by the involvement of several tissues and organs, particularly the joints, skin, and kidneys. It results in clinical manifestations similar to glomerulonephritis. |
| Kidney cancer: | There are no early symptoms of kidney cancer. Many patients with kidney cancer go undetected.Diagnostic tests include IVP with nephrotomography, ultrasound, percutaneous needle aspiration, CT, and MRI. |
| Risk factors for bladder cancer | include cigarette smoking, exposure to dyes used in the rubber and cable industries, chronic abuse of phenacetin-containing analgesics, and chronic, recurrent renal calculi |
| Bladder cancer: | Microscopic or gross, painless hematuria (chronic or intermittent) is the most common clinical finding with bladder cancer. |
| Surgical therapies for bladder cancer | include transurethral resection with fulguration, laser photocoagulation, and open loop resection. |
| Postoperative management following bladder cancer surgery | includes instructions to drink a large volume of fluid each day for the first week following the procedure and to avoid intake of alcoholic beverages. |
| Intravesical therapy | is chemotherapy that is locally instilled. Chemotherapeutic or immune-stimulating agents can be delivered directly into the bladder by a urethral catheter. BCG is the treatment of choice for carcinoma in situ. |
| Urinary incontinence (UI) | is an uncontrolled leakage of urine. The prevalence of incontinence is higher among older women and older men, but it is not a natural consequence of aging. |
| Causes of UI | include confusion or depression, infection, atrophic vaginitis, urinary retention, restricted mobility, fecal impaction, or drugs. |
| Urinary retention | is the inability to empty the bladder despite micturition or the accumulation of urine in the bladder because of an inability to urinate. |
| Urinary retention is caused by two different dysfunctions of the urinary system: | bladder outlet obstruction and deficient detrusor (bladder muscle) contraction strength. |
| Evaluation for UI and urinary retention | includes a focused history, physical assessment, and a bladder log or voiding record whenever possible. |
| Management strategies for UI | lifestyle interventions:adequate vol of fluids&reduction/elimination of bladder irritants from diet.Behavioral tx: scheduled voiding regimens (timed voiding, habit training, and prompted voiding), bladder retraining, and pelvic floor muscle training. |
| Acute urinary retention | is a medical emergency that requires prompt recognition and bladder drainage. |
| Short-term urinary catheterization | may be performed to obtain a urine specimen for laboratory analysis. Complications from long-term use (>30 days) of indwelling catheters include bladder spasms, periurethral abscess, pain, and urosepsis. |
| While the patient has a catheter in place, nursing actions should include | maintaining patency of the catheter, managing fluid intake, providing for the comfort and safety of the patient, and preventing infection. |
| The ureteral catheter is placed through the ureters into the renal pelvis. The catheter is inserted either | (1) by being threaded up the urethra and bladder to the ureters under cystoscopic observation, or (2) by surgical insertion through the abdominal wall into the ureters. |
| The suprapubic catheter is used in temporary situations such as | bladder, prostate, and urethral surgery. The suprapubic catheter is also used long term in selected patients. |
| Common indications for nephrectomy | include a renal tumor, polycystic kidney disease (PKD) that is bleeding or severely infected, massive traumatic injury to the kidney, and the elective removal of a kidney from a donor. A kidney can be removed by laparoscopic nephrectomy. |
| In the immediate postoperative period following renal surgery, | urine output should be determined at least every 1 to 2 hours. |
| Numerous urinary diversion techniques and bladder substitutes are possible, | including an incontinent urinary diversion, a continent urinary diversion catheterized by the patient, or an orthotopic bladder so that the patient voids urethrally. |
| Common peristomal skin problems associated with an ileal conduit include | dermatitis, yeast infections, product allergies, and shearing-effect excoriations. |
| Discharge planning after an ileal conduit includes | teaching the patient symptoms of obstruction or infection and care of the ostomy. |
| Chapter 47: | Nursing Management: Acute Renal Failure and Chronic Kidney Disease |
| Renal failure | is the partial or complete impairment of kidney function resulting in an inability to excrete metabolic waste products and water. |
| Renal failure causes | functional disturbances of all body systems. |
| Renal failure is classified as | acute or chronic. |
| Acute renal failure (ARF) | usually develops over hours or days with progressive elevations of blood urea nitrogen (BUN), creatinine, and potassium with or without oliguria. It is a clinical syndrome characterized by a rapid loss of renal function with progressive azotemia. |
| ARF is often associated with | oliguria (a decrease in urinary output to <400 ml/day). |
| The causes of ARF | are multiple and complex. They are categorized according to similar pathogenesis into prerenal (most common), intrarenal (or intrinsic), and postrenal causes. |
| Prerenal causes | are factors external to the kidneys (e.g., hypovolemia) that reduce renal blood flow and lead to decreased glomerular perfusion and filtration. |
| Intrarenal causes | damaged renal tissue,impaired nephron funct.causes:ischemia,nephrotoxins,hgb RBCs,myoglobin from necrotic muscle cell.Acute tubular necrosis cause:ischemia,nephrotoxins,pigments,reversible if basement membrane not destroyed&tubular epithelium regen |
| Postrenal causes | involve mechanical obstruction of urinary outflow. Common causes are benign prostatic hyperplasia, prostate cancer, calculi, trauma, and extrarenal tumors. |
| Clinically, ARF may progress through four phases: | initiating, oliguric, diuretic, and recovery. In some situations, the patient does not recover from ARF and chronic kidney disease (CKD) results, eventually requiring dialysis or a kidney transplant. |
| Oliguric Phase | Fluid and electrolyte abnormalities and uremia occur during the oliguric phase. The kidneys cannot synthesize ammonia or excrete acid products of metabolism, resulting in acidosis. |
| Damaged tubules cannot | conserve sodium resulting in normal or below-normal levels of serum sodium. Uncontrolled hyponatremia or water excess can lead to cerebral edema. Fluid intake must be closely monitored. |
| Hyperkalemia is a serious complication | of ARF. The serum potassium levels increase because the ability of the kidneys to excrete potassium is impaired. Acidosis worsens hyperkalemia as hydrogen ions enter the cells and potassium is driven out of the cells. |
| When potassium levels exceed 6 mEq/L (6 mmol/L) or dysrhythmias are identified, | treatment must be initiated immediately. |
| Hematologic disorders associated with ARF include | anemia due to impaired erythropoietin production and platelet abnormalities leading to bleeding from multiple sources. |
| A low serum calcium level results | inability of kidneys to activate vitD.When hypocalcemia occurs,parathyroid gland secretes parathyroid hormone,which stimulates bone demineralization,thereby releasing CA. Phosphate is also released, leading to elevated serum phosphate levels. |
| The two most common causes of death in patients with ARF | are infection and cardiorespiratory complications. |
| The best serum indicator of renal failure | is creatinine because it is not significantly altered by other factors. |
| Neurologic changes | can occur as the nitrogenous waste products increase. Symptoms can include fatigue and difficulty concentrating, later escalating to seizures, stupor, and coma. |
| The diuretic phase | gradual inc in daily urine output of 1-3 L/day,may reach 3-5L+.nephrons are not fully functional. The uremia may still be severe, as reflected by low creatinine clearances, elevated serum creatinine and BUN levels, and persistent signs and symptoms. |
| The recovery phase | begins when the GFR increases, allowing the BUN and serum creatinine levels to plateau and then decrease. Renal function may take up to 12 months to stabilize. |
| Because ARF is potentially reversible, the primary goals of treatment | are to eliminate the cause, manage the signs and symptoms, and prevent complications while the kidneys recover. |
| Common indications for dialysis in ARF are | (1) volume overload; (2) elevated potassium level with ECG changes; (3) metabolic acidosis; (4) significant change in mental status; and (5) pericarditis, pericardial effusion, or cardiac tamponade. |
| Hemodialysis (HD) | used when rapid changes are required in short pd.Peritoneal dialysis is simpler than HD, risk of peritonitis,less efficient in catabolic patient,requires longer treatment times.Continuous renal replacement tx of ARF,in hemodynamically unstable |
| Prevention of ARF | is primarily directed toward identifying and monitoring high-risk populations, controlling exposure to nephrotoxic drugs and industrial chemicals, and preventing prolonged episodes of hypotension and hypovolemia. |
| The patient with ARF | is critically ill and suffers not only from the effects of renal disease but also from the effects of comorbid diseases or conditions (e.g., diabetes, cardiovascular disease). |
| The nurse has an important role in managing | fluid and electrolyte balance during the oliguric and diuretic phases. Observing and recording accurate intake and output and body weight are essential. |
| Because infection is the leading cause of death in ARF, | meticulous aseptic technique is critical.nurse should be alert for local manifestations of infection (e.g., swelling, redness, pain) as well as systemic manifestations (e.g., malaise, leukocytosis) because an elevated temperature may not be present. |
| Respiratory complications, especially pneumonitis, can be prevented. | Humidified oxygen; incentive spirometry; coughing, turning, and deep breathing; and ambulation are measures to help maintain adequate respiratory ventilation. |
| Skin care and measures to prevent | pressure ulcers should be performed because of edema and decreased muscle tone. Mouth care is important to prevent stomatitis. |
| Recovery from ARF | highly variable&depends on underlying illness,condition&age,length of oliguric phase, severity of nephron damage. Good nutrition, rest, and activity are necessary. Protein and potassium intake should be regulated in accordance with renal function. |
| The long-term convalescence | 3-12mons may cause psychosocial&financial hardships, and appropriate counseling, social work, and psychiatrist/ psychologist referrals are made as needed. If the kidneys do not recover, the patient will eventually need dialysis or transplantation. |
| The older adult is more susceptible than the younger adult to ARF | as the number of functioning nephrons decreases with age. |
| Causes of ARF | include dehydration, hypotension, diuretic therapy, aminoglycoside therapy, prostatic hyperplasia, surgery, infection, and radiocontrast agents. |
| Chronic kidney disease (CKD) | involves progressive, irreversible loss of kidney function. |
| CKD usually develops | slowly over months to years and necessitates the initiation of dialysis or transplantation for long-term survival. The prognosis of CKD is variable depending on the etiology, patient’s condition and age, and adequacy of follow-up. |
| Uremia | is a syndrome that incorporates all the signs and symptoms seen in the various systems throughout the body in CKD. |
| In the early stage of renal insufficiency, | polyuria results from the inability to concentrate urine. As the GFR decreases, the BUN and serum creatinine levels increase. |
| Clinical manifestations of uremia | develop. Fatigue, lethargy, and pruritus are often the early symptoms. Hypertension and proteinuria are often the first signs. Hyperglycemia, hyperinsulinemia, and abnormal glucose tolerance tests may be seen. |
| Many patients with uremia develop hyperlipidemia, | with elevated very-low-density lipoproteins (VLDLs), normal or decreased low-density lipoproteins (LDLs), and decreased high-density lipoproteins (HDLs). |
| Hyperkalemia results from | the decreased excretion by the kidneys, the breakdown of cellular protein, bleeding, and metabolic acidosis. Potassium may also come from the food consumed, dietary supplements, drugs, and IV infusions. |
| Because of impaired sodium excretion, | sodium along with water is retained resulting in dilutional hyponatremia. Sodium retention can contribute to edema, hypertension, and heart failure. |
| Metabolic acidosis results from | the impaired ability to excrete the acid load (primarily ammonia) and from defective reabsorption and regeneration of bicarbonate. |
| Normocytic or normochromic anemia | is due to decreased production of erythropoietin. The most common cause of bleeding is a qualitative defect in platelet function. |
| Infectious complications are common in | CKD. Clinical findings include lymphopenia, lymphoid tissue atrophy, decreased antibody production, and suppression of the delayed hypersensitivity response. |
| The most common cardiovascular abnormality | is hypertension, which is usually present pre-ESRD and is aggravated by sodium retention and increased extracellular fluid volume. Diabetes mellitus is an additional risk factor. |
| Cardiac dysrhythmias may result from | hyperkalemia, hypocalcemia, and decreased coronary artery perfusion. |
| Respiratory changes include | Kussmaul respiration, dyspnea from fluid overload, pulmonary edema, uremic pleuritis (pleurisy), pleural effusion, and a predisposition to respiratory infections. |
| Neurologic changes are due to | increased nitrogenous waste products, electrolyte imbalances, metabolic acidosis, axonal atrophy, and demyelination. Depression of the CNS results in lethargy, apathy, decreased ability to concentrate, fatigue, irritability, and altered mental ability. |
| Peripheral neuropathy | may result in restless legs syndrome, paresthesias, bilateral footdrop, muscular weakness and atrophy, and loss of deep tendon reflexes. |
| The treatment for neurologic problems is | dialysis or transplantation. Altered mental status is often the signal that dialysis must be initiated. |
| Renal osteodystrophy | syndrome of skeletal changes result of alterations in CA&phosphate metabolism.Osteomalacia is demineralization from slow bone turnover&defective mineralization of newly formed bone.Osteitis fibrosa cystica:decalcification&replacement w/fibrous tissue |
| Pruritus | results from a combination of the dry skin, calcium-phosphate deposition in the skin, and sensory neuropathy. |
| Both sexes experience | infertility and a decreased libido. Sexual dysfunction may also be caused by anemia, peripheral neuropathy, and psychologic problems, physical stress, and side effects of drugs. |
| Personality and behavioral changes, emotional lability, withdrawal, depression, fatigue, and lethargy | are commonly observed. Changes in body image caused by edema, integumentary disturbances, and access devices lead to further anxiety and depression. |
| Adverse outcomes of CKD | can be prevented/delayed through early detection/tx.conservative therapy is attempted before maintenance dialysis begins.Efforts are made to detect/treat potentially reversible causes of renal failure.progression can be delayed by controlling HTN |
| Strategies to reduce serum potassium levels include | IV glucose and insulin, IV 10% calcium gluconate, and sodium polystyrene sulfonate (Kayexalate). |
| The antihypertensive drugs | most commonly diuretics(furosemide), Beta blockers(metoprolol),CA channel blockers (e.g., nifedipine [Procardia]), angiotensin-converting enzyme inhibitors (e.g., captopril [Capoten]), and angiotensin receptor blocker agents (e.g., losartan [Cozaar]). |
| Erythropoietin | is used for the treatment of anemia. It can be administered IV or subcutaneously. Statins (HMG-CoA reductase inhibitors) are the most effective drugs for lowering LDL cholesterol levels. |
| Drug doses and frequency of administration | must be adjusted based on the severity of the kidney disease. |
| Dietary protein | restricted because urea nitrogen&creatinine are end products of protein metabolism.pt starts dialysis,protein intake can be inc.Sufficient calories from carbohydrates and fat are needed to minimize catabolism of body protein and to maintain body weight. |
| Water intake | depends on the daily urine output. Generally, 600 ml (from insensible loss) plus an amount equal to the previous day’s urine output is allowed for a patient who is not receiving dialysis. Phosphate should be limited to approximately 1000 mg/day. |
| The overall goals are that a patient with CKD will | (1) demonstrate knowledge and ability to comply with treatment, (2) participate in decision-making, (3) demonstrate effective coping strategies, and (4) continue with activities of daily living within limitations. |
| People at risk for CKD | history(or family history)of renal disease, HTN,diabetes,repeated UTI.should have regular checkups:serum creatinine,BUN, urinalysis and be advised that any changes in urine appearance, frequency, or volume must be reported to the health care provider. |
| Dialysis | is a technique in which substances move from the blood through a semipermeable membrane and into a dialysis solution (dialysate).The two methods of dialysis are peritoneal dialysis (PD) and hemodialysis (HD). |
| Peritoneal Dialysis | Two types are automated peritoneal dialysis (APD) and continuous ambulatory peritoneal dialysis (CAPD). |
| PD is indicated | when there are vascular access problems. The three phases of the PD cycle (called an exchange) are inflow (fill), dwell (equilibration), and drain. |
| The patient dialyzing at home will | 4 exchanges per day. Contraindications for PD are history of multiple abdominal surgeries, recurrent abdominal wall or inguinal hernias, excessive obesity with large fat deposits, preexisting vertebral disease, and severe obstructive pulmonary disease. |
| Dialysis solutions | have an electrolyte composition similar to that of plasma. Using dry heat, the dialysis solution is warmed to body temperature to increase peritoneal clearance, prevent hypothermia, and enhance comfort. |
| CAPD | is carried out manually by exchanging 1.5 to 3 L (usually 2 L) of peritoneal dialysate at least 4 times daily, with dwell times of 4 to 10 hours. PD is associated with a short training program, independence, and ease of traveling. |
| Infection of the peritoneal catheter exit site is most commonly caused by | Staphylococcus aureus or S. epidermidis (from skin flora). Peritonitis results from contamination of the dialysate or tubing or from progression of an exit site infection. |
| Pain is a common complication of PD | change in position of catheter should correct.dec in infusion rate may help.Other comps:hernias,lower back pain,protein loss,encapsulating sclerosing peritonitis,bleeding.Atelectasis,pneumonia,bronchitis from repeated upward displacement of diaphragm. |
| Hemodialysis | The types of vascular access include arteriovenous fistulas (AVFs) and grafts (AVGs), temporary and semipermanent catheters, subcutaneous ports, and shunts. |
| Shunts are not frequently used except | for the patient with continuous renal replacement therapy (CRRT) because of the numerous complications (e.g., infection, thrombosis). |
| An AVF (arteriovenous fistulas) | is created most commonly in the forearm with an anastomosis between an artery (usually radial or ulnar) and a vein (usually cephalic). Native fistulas have the best overall patency rates and least number of complications. |
| Arteriovenous grafts (AVGs) | are made of synthetic materials and form a “bridge” between the arterial and venous blood supplies. Grafts are placed under the skin and are surgically anastomosed between an artery (usually brachial) and a vein (usually antecubital). |
| BP measurements, insertion of IVs, and venipuncture | should never be performed on the affected extremity. |
| When immediate vascular access is required, | percutaneous cannulation of the internal jugular or femoral vein may be performed. |
| Before beginning treatment, the nurse must complete an assessment that includes | fluid status (weight, BP, peripheral edema, lung and heart sounds), condition of vascular access, temperature, and general skin condition. |
| Hypotension that occurs during HD results from | rapid removal of vascular volume, decreased cardiac output, and decreased systemic intravascular resistance. Treatment includes decreasing the volume of fluid being removed and infusion of 0.9% saline solution (100 to 300 ml). |
| Painful muscle cramps | due to rapid removal of sodium and water are a common problem. Treatment includes reducing the ultrafiltration rate and infusing hypertonic saline or a normal saline bolus. |
| The causes of hepatitis B and C (most common) in dialysis patients include | blood transfusions or the lack of adherence to precautions used to prevent the spread of infection. |
| Disequilibrium syndrome | develops as a result of very rapid changes in the composition of the extracellular fluid. Manifestations include nausea, vomiting, confusion, restlessness, headaches, twitching and jerking, and seizures. |
| Individual adaptation to maintenance HD | varies considerably. The primary nursing goals are to help the patient regain or maintain positive self-esteem and control of his or her life and to continue to be productive in society. |
| Continuous renal replacement therapy (CRRT) | is an alternative or adjunctive treatment. |
| Continuous renal replacement therapy (CRRT) Uremic toxins and fluids are removed, | while acid-base status and electrolytes are adjusted slowly and continuously from a hemodynamically unstable patient. |
| Continuous renal replacement therapy (CRRT) Vascular access is | achieved through the use of a double-lumen catheter placed in the femoral, jugular, or subclavian vein. Anticoagulation is used to prevent blood clotting during CRRT. |
| One-year graft survival rates for kidney transplantation | are 90% for deceased donor transplants and 95% for live donor transplants. |
| Contraindications to kidney transplantation include | disseminated malignancies, refractory or untreated cardiac disease, chronic respiratory failure, extensive vascular disease, chronic infection, and unresolved psychosocial disorders. |
| Kidneys for transplantation may be obtained from | compatible-blood-type deceased donors, blood relatives, emotionally related living donors, and altruistic living donors. |
| Live donors must | undergo an extensive evaluation to be certain that they are in good health and have no history of disease that would place them at risk for developing kidney failure or operative complications. |
| Deceased (cadaver) kidney donors | are relatively healthy individuals who have suffered an irreversible brain injury. Permission from the donor’s legal next of kin is required after brain death is determined even if the donor carried a signed donor card. |
| For a live donor transplant, | the donor nephrectomy is performed either through an open incision or laparoscopically. The short cold ischemic time is the primary reason for the success of living donor transplants. |
| The transplanted kidney | is usually placed extraperitoneally in the right iliac fossa to facilitate anastomoses and minimize the occurrence of ileus. Nursing care of the patient in the preoperative phase includes emotional and physical preparation for surgery. |
| The usual postoperative care for the living donor | is similar to that following conventional or laparoscopic nephrectomy. |
| For the kidney transplant recipient the first priority | during this period is maintenance of fluid and electrolyte balance. |
| Very large volumes of urine may be produced soon after the blood supply to the transplanted kidney is reestablished. This is due to | (1) the new kidney’s ability to filter BUN, which acts as an osmotic diuretic; (2) the abundance of fluids administered during the operation; and (3) initial renal tubular dysfunction, which inhibits the kidney from concentrating urine normally. |
| KIDNEY TRANSPLANTATION Postoperative teaching should include | the prevention and treatment of rejection, infection, and complications of surgery and the purpose and side effects of immunosuppression. |
| Rejection, a major problem following kidney transplantation, | can be hyperacute, acute, or chronic. Immunosuppressive therapy is used to prevent rejection while maintaining sufficient immunity to prevent overwhelming infection. |
| Infection is a significant cause of morbidity and mortality after kidney transplantation. | Transplant recipients usually receive prophylactic antifungal drugs. Viral infections can be primary or reactivation of existing disease. CMV is one of the most common viral infections. |
| Cardiovascular disease is the leading cause of death after renal transplantation. | Hypertension, hyperlipidemia, diabetes mellitus, smoking, rejection, infections, and increased homocysteine levels can all contribute to cardiovascular disease. |
| The overall incidence of malignancies in kidney transplant recipients | is 100 times greater than in the general population. The primary cause is the immunosuppressive therapy. |
| Aseptic necrosis of the hips, knees, and other joints | can result from chronic corticosteroid therapy and renal osteodystrophy. |
| Approximately 35% to 65% of patients who have CKD | are 65 or older. Physiologic changes in the older CKD patient include diminished cardiopulmonary function, bone loss, immunodeficiency, altered protein synthesis, impaired cognition, and altered drug metabolism. |
| Most elderly ESRD patients select | home dialysis. However, establishing vascular access for HD may be challenging due to atherosclerotic changes. |
| The most common cause of death in the elderly ESRD patient | is cardiovascular disease (MI, stroke), followed by withdrawal from dialysis. |
| Chapter 15: | Infection and Human Immunodeficiency Virus Infection |
| An infection | is an invasion of the body by a pathogen (any microorganism that causes disease) and the resulting signs and symptoms that develop in response to the invasion. |
| The most common causes of infection | are bacteria, viruses, fungi, and protozoa. |
| An emerging infection | is an infectious disease whose incidence has increased in the past 20 years or threatens to increase in the immediate future. |
| Emerging infectious diseases can originate from | unknown sources, contact with animals, changes in known diseases, or biologic warfare. |
| Resistance | occurs when pathologic organisms change in ways that decrease the ability of a drug (or a family of drugs) to treat disease. |
| Methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant enterococci (VRE), and penicillin-resistant Streptococcus pneumonia | are three of the most troublesome antibiotic-resistant bacteria currently causing problems in North America. |
| Nosocomial infections | are infections that are acquired as a result of exposure to a microorganism in a hospital setting and typically occur within 72 hours of hospitalization. |
| For older adult patients, the rate of nosocomial infection | is two to three times higher than for younger patients. |
| The human immunodeficiency virus (HIV) | is a ribonucleic acid (RNA) virus, which means it replicates going from RNA to deoxyribonucleic acid (DNA). |
| HIV can only be transmitted | under specific conditions that allow contact with infected body fluids, including blood, semen, vaginal secretions, and breast milk. |
| Sexual contact with an HIV-infected partner | is the most common mode of transmission. |
| Immune dysfunction in HIV disease | is caused predominantly by damage to and destruction of CD4+ T cells (also known as T helper cells or CD4+ T lymphocytes). |
| The major concern related to immune suppression | is the development of opportunistic diseases (infections and cancers that occur in immunosuppressed patients that can lead to disability, disease, and death). |
| HIV infections are divided into | acute, early chronic, intermediate chronic, and late chronic infection. |
| Late chronic infection | is also known as acquired immunodeficiency syndrome (AIDS). |
| The most useful screening tests for HIV | detect HIV-specific antibodies.major problem with tests is a median delay of 2 months after infection before antibodies can be detected. This creates a window period during which an infected individual may not test positive for HIV-antibody. |
| The goals of drug therapy in HIV infection are to | (1) decrease the viral load, (2) maintain or raise CD4+ T cell counts, and (3) delay the development of HIV-related symptoms and opportunistic diseases. |
| The major drug classifications for HIV include | nonnucleoside reverse transcriptase inhibitors (NNRTIs), nucleoside reverse transcriptase inhibitors (NRTIs), nucleotide reverse transcriptase inhibitors (NtRTIs), protease inhibitors (PIs), and entry inhibitors. |
| Management of HIV is complicated | by the many opportunistic diseases that can develop as the immune system deteriorates. |
| Examples of opportunistic infections include | Pneumocystis jiroveci pneumonia (PCP), Mycobacterium avium complex (MAC), and Kaposi sarcoma. |
| Nursing care for individuals not known to be infected with HIV | should focus on behaviors that could put the person at risk for HIV infection and other sexually transmitted and blood-borne diseases. |
| The overriding goals of therapy for infected individuals are | to keep viral load as low as possible for as long as possible, maintain or restore a functioning immune system, improve the patient’s quality of life, prevent opportunistic disease, reduce HIV-related disability and death, and prevent new infections. |
| HIV-infected patients share problems experienced | by all individuals with chronic diseases, but these problems are exacerbated by negative social constructs surrounding HIV. |
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