ckd dialysis Flashcards
Dialysis works through?
Osmosis
Diffusion
What is Dialysis?
Substances move from blood through a semipermeable membrane and into a dialysis solution
What is the dialysis solution called?
Dialysate
What percentage of people get Hemodialysis?
90%
What percentage of people get Continuous Ambulatory Peritoneal Dialysis?
10%
Where is the membrane located for Hemodialysis?
Outside of body
Where is the membrane located for Peritoneal Dialysis?
Peritoneum
What is needed for Hemodialysis?
An access
Types of Accesses
AV Fistula
External Devices
The AV Fistula is…
permanent
Most common placement for AV Fistula?
Forearm
What happens to the vein and artery where the AV Fistula is placed?
It is anastomosed
An anastomosis requires how long to “mature” before using?
Months
Nursing Implications for the AV Fistula?
Assess for a thrill and a bruit every shift
Avoid BPs, IV sticks in affected arm
Assess peripheral perfusion distal to site
Who does an anastomosis?
OR surgeon
An AV Fistula should last up to ___ ___with dialysis, if it used and does well its first ___ ___.
20 years; 6 months
Thrills and bruits are ______ findings?
expected
A _____ and _____ confirms patency
thrill; bruit
If no thrill or bruit is heard…
notify the provider
Assess peripheral perfusion by:
checking cap refill, radial and ulnar pulses, numbness/tingling, motor dexterity, pain
AV graft is made of…
synthetic material
Advantage of AV Graft…
matures or can be used quicker than AV Fistula
Disadvantage if AV Graft…
body recognizes it as a foreign object and it can become infected
AV Graft used for…
small weak veins or if need to use quicker than when a AV Fistula can be used use
External devices for Hemodialysis are:
Right IJ, Femoral, “Udall” catheter
External devices are:
temporary
Characteristics of Right IJ?
Tunneled, cuffed catheter
Placed by HCP
Lasts 1-3 weeks
How long does a femoral external device last?
1 week
Patient will be…. when they have a femoral external device?
on bedrest with minimal leg movement
What can be used in place of AV Fistula while waiting for it to mature?
External devices: Right IJ, Femoral
A Udall catheter is used for….
patient with AKI
needing dialysis short term (7-10 days)
How often is Hemodialysis done?
4hrs, 3x a week
rest of life
NO MATTER WHAT
What is needed for Peritoneal Dialysis?
A catheter
Most common type of Peritoneal Dialysis catheter?
Tenckhoff
How often is Peritoneal Dialysis done?
4x a day, rest of life
What does a Peritoneal Dialysis “cycle” consist of?
Inflow or “Fill”
Dwell
Drain
What happens during inflow or “fill” phase?
2L dialysate into abdomen
Takes about 10 minutes
What happens during dwell phase?
Diffusion and osmosis takes place
Dwell time varies (prescribed)
Patient can ambulate during this time
What happen during drain phase?
Emptying of used dialysate
By gravity flow
Takes about 15-30 minutes
Advantages of Peritoneal Dialysis?
No going to dialysis clinic Autonomy Increased Mobility Less CV stress Less complicated
Disadvantages of Peritoneal Dialysis?
Done a lot more often then Hemodialysis
Body image issues
Requires high motivation
Risk for peritonitis
Automated Peritoneal Dialysis…
Automatically cycles times and controls fill, dwell and drain phases
Automated Peritoneal Dialysis uses…
A cycler
When is APD primarily used?
At night
How many exchanges per night using APD?
About 4 or so exchanges at about 1hr per exchange
Characteristics of Continuous Ambulatory Peritoneal Dialysis…
Manual exchanges
At least 4x/ day
Dwell times vary
May be able to disconnect bag during dwell period
Can use Tenckhoff catheter after how many weeks?
1-2 weeks
Caring for a Tenckhoff catheter
Shower and pat dry
Requires daily catheter care: antiseptic solution, remove dressing once healed, examine site for S/S for infection
What is the MAJOR complication of Peritoneal Dialysis?
Peritonitis
Why is peritonitis a major risk of Peritoneal Dialysis?
Constant contact of site with less-than-meticulous aseptic technique
Complications of Hemodialysis…
Infection Decreased Cardiac Output Cardiac Dysrhythmias Disequilibrium Syndrome (disorientation, seizures, HA, agitation, N/V) ***unique to Hemodialysis*** Air Embolism
Complications of Peritoneal Dialysis…
Infection Decreased Cardiac Output Fluid Overload Respiratory Insufficiency Abdominal Pain
Advantages of Hemodialysis?
Rapid removal of fluid, urea/ creatinine, K+
Disadvantage if Hemodialysis?
Requires vascular access, may require heparin
Dietary/ Fluid restrictions more strict
Hypotension during dialysis
Does NOT mimic a normal urine output
What are Nursing Considerations for Dialysis?
Monitor VS I&Os, weigh daily Monitor S/S complications Monitor lab values Daily catheter/fistula care
PD:
Turn side to side to facilitate drainage
Observe color of dialysate
HD:
No BP, injections, IVs on affected limb
Dark, cloudy dialysate could indicate what?
Peritonitis
Patient who are on dialysis may have _____ levels of drugs due to drugs not being ______?
toxic; excreted
*Particularly drug that are excreted by way of kidneys
Some drugs are lost during dialysis, this causes….
post-dialysis subtherapeutic levels
Drug therapy and Hemodialysis
Be aware of which drugs are dialyzed out
Administer those AFTER dialysis
Dosing may need to be altered to reduce chance of toxicity