Adult GI/GU Flashcards
(120 cards)
Renal Replacement Therapies (Dialysis)
Indications
Indicated for AKI or ESRD as characterized by:
- Severe fluid and electrolyte imbalances (potassium, calcium/phosphorus inverted)
- Elevated serum creatinine
- Elevated serum potassium
- Acidosis
- Presence of uremic manifestations: N/V, fatigue, anorexia, weight loss, muscle cramps, pruritus, or changes in mental status (build up of waste)
- Patients with a GFR <10 mL/min
Continuous Renal Replacement Therapy (CRRT)
Indications
Vascular Access
Process
Indications
- Indicated for acutely ill patients with AKI or patients with severe fluid overload who are hemodynamically unstable**
Vascular Access
- Central venous double lumen catheter (CRRT) OR
- Single-lumen central venous line in combination with an arterial line
Process
- Blood from the patient flows through a highly permeable hemofilter which removes water and solutes, collectively termed ultrafiltrate
- As the blood returns to the patient, replacement fluid and electrolytes can be infused to replace the volume and solutes the patient needs to maintain stability
Continuous Renal Replacement Therapy (CRRT)
Complications
Mechanical Complications
Vascular access-related complications
- Bleeding, hematoma, thrombosis
- Infection
Extracorporeal circuit complications (filter complication)
- Premature filter clotting
- Air embolism
Hemodynamic Complications
- Hypothermia
- Hypotension: adjust the rate of the CRRT
Metabolic Complications
Acid-base abnormalities
- Metabolic acidosis - most likely
- Metabolic alkalosis
Electrolyte abnormalities
- Hypernatremia
- Hypophosphatemia
- Hypomagnesemia
- Hypocalcemia
- Hypokalemia
Pharmacological Complication -
- Rate changes -> kidneys filter medications
- Challenging antimicrobial dosing
Nursing Assessment for CRRT**
Frequent/hourly vital signs (usually q15 min, q30 min)
Hourly assessment of volume of filtrate (what is being filtered out)
- Increases may require modifications to maintain hemodynamic stability
- Decrease may indicate a clot or obstructed filter
Hemodialysis (HD)
Vascular Access**
Central venous double lumen catheter in the subclavian or internal jugular vein
- Used on a short-term basis (in patients with AKI requiring intermittent HD OR when waiting to secure long-term access)
- High risk of infection
Arteriovenous (AV) fistula (most common)
- Created by surgical anastomosis of an artery and vein (usually radial artery and cephalic vein) in the nondominant arm
- Fistula must “mature” prior to being suitable for dialysis, which can take several weeks
- Will usually use a central line while the AV is maturing
- Has a bulging and tortuous appearance under the skin
Arteriovenous (AV) graft
- A prosthetic graft is inserted between an artery and vein in the nondominant arm
- May be used more quickly than AV fistulas, but do not last as long and are more prone to infection
Hemodiaylsis
Process
Uses diffusion and filtration to remove waste products, electrolytes, and excess water from the body
Usually completed 3 times/week (M/W/F or T/Th/Sa) for 3-5 hours/session
Hemodialysis
Complications and treatments
Hypotension
- Due to the rapid removal of fluid from the vascular compartment
- Signs: light-headedness, nausea/vomiting, seizures, vision changes, chest pain r/t cardiac ischemia
- Treatment: decrease rate of fluid removal and replace fluid with IV NS
Muscle cramps (hypokalemia), Headache, Nausea, Dizziness, and Malaise
- Due to the rapid removal of electrolytes and water
- Treatment: reduce filtration rate or infuse NS bolus
Bleeding
- Due to altered platelet function associated with uremia and the use of heparin during the procedure
Systemic infection
- Higher risk of developing Hepatitis B, Hepatitis C, cytomegalovirus, and HIV
Dialysis-associated dementia
- Progressive, potentially incurable neurologic complication
- Thought to be due to aluminum present phosphate binders found in the dialysate solution as well as in oral phosphate binders
Dialysis disequilibrium syndrome
- Due to the very rapid changes in the composition of the extracellular fluid, causing a shift of fluid into the brain
- Signs of increased ICP: nausea/vomiting, confusion, restlessness, headaches, twitching, seizures
- Treatment: slow rate of dialysis and infuse hypertonic saline solution, albumin, or mannitol to draw fluid from the brain cells
Localized Complications
- Localized infection of the AV fistula or graft, can lead to systemic septicemia
- Clotting of AV fistula or graft, can lead to embolization
Nursing Assessment for Hemodialysis**
- Assess central venous double lumen catheter for evidence of bleeding or infection
- Monitor for drainage, surrounding erythema or edema, excessive pain
- Functional AV fistulas and grafts should have a palpable pulsation (“thrill”) and a bruit noted on auscultation
- Neurological assessment (dialysis disequilibrium syndrome)
- Systems assessment post-dialysis
- Monitor for muscle cramps, headache, nausea, dizziness, and malaise
Peritoneal Dialysis (PD)
Indications
Contraindications**
Indicated for patients who desire more control, who have had vascular access problems or who respond poorly to HD with hemodynamic instability
Contraindications
- History of multiple abdominal surgeries or chronic abdominal conditions (Crohns)
- Recurrent abdominal wall or inguinal hernias (increased abdominal pressure)
- Obesity with a large abdominal wall (lots more space for catheter to become dislodged or kinked)
- Pre-existing back problems or vertebral disease (weight of fluid will make back problems worse)
- Severe COPD (fluid filled cavity will push up lungs)
Peritoneal Dialysis (PD)
Access
Process
Access
- Permanent indwelling PD catheter
Process
- The membrane of the peritoneal cavity is used as a dialyzing layer
- Three Phases
1. Fill Phase
- Room-temperature sterile dialysate is instilled into the peritoneal cavity via the catheter
2. Dwell Phase
- Metabolic waste products and excess electrolytes diffuse into the dialysate while in remains in the abdomen
3. Drain Phase
- Gravity drains fluid out of the peritoneal cavity into a sterile bag
Three Forms of Peritoneal Dialysis
Continuous Ambulatory Peritoneal Dialysis (CAPD)
- Dialysate is infused into the abdomen 4-5 times per day with a dwell time of 4-6 hours
- Patients may be ambulatory during the dwell phase
Does not require machines
- If they skip it, it’s the equivalent of missing hemodialysis treatments
Automated Peritoneal Dialysis
- Uses a cycler to perform multiple overnight exchanges
- Machine is programmed to meet individual patient needs
- Allows patient to be dialysis-free during the day
Intermittent Peritoneal Dialysis
- Multiple short dwells utilizing automated technology
- 30-40 exchanges per week (30–60-minute exchanges)
Peritoneal Dialysis
Complications
Peritonitis**
- May result from contamination of the dialysate or tubing OR from bacteria in the intestine migrating into the peritoneal cavity
- Cloudy peritoneal effluent (or yellow/purulent) with an increased WBC count
- Severe abdominal pain, rigid abd pain, fever
- Treatment: antibiotics; may be given orally, IV, or intraperitoneally
- Repeated infections warrant removal of the PD catheter and a switch to HD
Catheter Infection
- Catheter site redness, tenderness, or drainage
- May result in abscess formation (and peritonitis) if not treated promptly and correctly
- Treatment: antibiotics
Abdominal Pain (causes)
- Intraperitoneal irritation from the low pH of the dialysate solution
- Tip of the catheter resting against the bladder, blow or peritoneum
- Accidental infusions of air
- Infusing dialysate too rapidly
- Infusing the dialysate at less than room temperature (cold)
Hyperglycemia and Increased Triglyceride Levels
- Glucose in the dialysate can be absorbed into the bloodstream causing hyperglycemia
- Insulin secreted in response to this hyperglycemia stimulates hepatic production of triglycerides
Outflow Problems (causes)
- Kinks in the catheter
- A fold in the abdomen compressing the catheter
- Migration of the catheter outside the peritoneal cavity
- Constipation or a full colon
Respiratory Compromise
- Repeated upward displacement of the diaphragm may cause atelectasis, pneumonia, and bronchitis
Protein Loss
- Peritoneal membrane is permeable to plasma proteins, amino acids and polypeptides which may result in excess protein loss
Nursing Assessment for Peritoneal Dialysis**
Monitor for complications
Monitor/Measure Abdominal girth
Monitor outflow
- Amount and COLOR
- Look for signs of infection (discolored/purulent outflow)
Acute Glomerulonephritis
Etiology
Patho
Inflammation of the glomeruli in the kidney* *Caused by autoimmune disorders or INFECTION
- Infection: Group A Beta-Hemolytic Streptococcus
- Throat (Strep Throat) or Skin (Impetigo)
*Occurs approximately 10 days after symptoms of infection present
*Most often seen in children and young adults
*Most patients fully recover if treated early
Patho
*Triggered by an immunologic mechanism
- Circulating antigens provoke the development of an antibody response
- Antigen-antibody complexes are deposited in the glomerular capillary walls
- Inflammatory changes in the glomeruli
- Vasoconstriction and decrease in plasma flow
*Glomeruli swell and glomerular capillaries are destroyed, increasing the permeability of the glomerulus basement membrane
- Blood and proteins leak into the urine
Acute Glomerulonephritis
Assessment, Clinical Presentation
- Edema/Fluid retention** (secondary to protein loss)
- Decreased urine output
- Cola colored urine (due to hematuria)**
- Mild hypertension (due to fluid retention)
- Fatigue, HA, pitting edema
Acute Glomerulonephritis
Lab Evaluations
Diagnosis
Lab Evaluation
*Urinalysis
- Protein (+)**
- WBC (+)
- Blood (+)**
* CMP
- Increased BUN
- Increased Creatinine
- Decreased GFR**
- Decreased Albumin
CBC
- Increased WBC
Diagnosis
- Based on history, physical exam, and lab findings
Acute Glomerulonephritis
Complications
Actual
- Fluid overload
- Hypertension
Potential
- If untreated or unresponsive to treatment, may develop acute or chronic kidney disease
Acute Glomeruloenphritis
Treatment
Based on the cause of the disease and the presenting symptoms
*Management of Infection: Antibiotics
- Penicillin**
*Treatment/Prevention of Complications
- Diuretics to treat HTN
- Fluid and sodium restriction
- Low protein diet (to prevent buildup of metabolic waste)
*Modulation of immune response
- Steroids
*Plasmapheresis
- Extracorporeal separation of the blood components to filter out immune complexes
- Filtered plasma is discarded while the RBCs and donor plasma are returned to the patient
*REST!!
Acute Glomeruloenphritis
Nursing Management
Nursing Management
- Monitor VS, Daily Weight, I&O
- Monitor dietary intake
- Administer medications as directed
Patient and Family Teaching
- Disease process
- Use of prescribed medications
- Emphasize medication adherence and completion of antibiotic regimen
- Dietary restrictions
- Infection prevention
Polycystic Kidney Disease
Etiology, Patho
Progressive disorder causing excessive growth of fluid-filled cysts in the kidneys, leading to complications over time!!
*Childhood: Autosomal recessive disorder
- May lead to ESRD as well as severe lung and liver dysfunction
*Adult: Autosomal dominant disorder
- Relatively common
- Lives dormant for many years – usually appears between the ages of 30-40
- Cysts not limited to kidneys – may also be present in liver, spleen, and pancreas
*Often found during workup of hypertension
Pathophysiology
- Genetic disorder that manifests in the cortex and medulla of both kidneys
- Large, thin-walled cysts develop as a result of repeated cell division
- Cysts become large and compress surrounding tissue, destroying underlying renal tissue
- Blood flow and nutrient supply to the kidneys is reduced
Polycystic Kidney Disease
Clinical Presentation, Assessment
- No clinical manifestations in the early stages
- First Symptom: Hypertension** (result of damage to the renal structures)
- Hematuria (due to rupture of cysts)
- Low back or flank pain
- Abdominal pain
- Headache
- Symptoms of obstruction to urinary flow
*UTI
*Increase in urinary frequency
*Urinary calculi - Positive CVA tenderness
Polycystic Kidney Disease
Lab evaluation, Radiologic evaluation, Diagnosis
*Urinalysis
- Blood (+)
- Bacteria (+)
*CBC
- Decreased H/H
CMP
- Increased BUN
- Increased Creatinine
- Increased Potassium
- Decreased Calcium
- Increased Phosphorus
*Genetic Testing
Radiology Evaluation
- Renal Ultrasound: used to evaluate for renal cysts
Inexpensive, non-invasive
- Abdominal CT scan: used visualize renal cysts and to evaluated for other complications related to PKD (i.e., cysts on the liver or other abdominal organs)
Diagnosis
- Often based on family history and presenting symptoms
- Confirmed with imaging (US, CT, etc.)
Polycystic Kidney Disease
Complications
Actual
- Hypertension
- Hematuria (if cysts have ruptured)
Potential
- Renal calculi and recurrent UTIs
- Heart valve abnormalities
- High risk for development of abdominal or cerebral aneurysms
- Liver and other GI organ/tract cysts
- Renal failure!!
Polycystic Kidney Disease
Medical Treatment
HTN Management
- ACE Inhibitors or ARBs
Pain Management
- Non-narcotic medications (Acetaminophen), no NSAIDs, Ibuprofen
- Narcotic medications
- Palliative nephrectomy if pain is too severe
UTI Management
- Antibiotics (rocpehin)
Renal Transplant considered the only curative measure