When comparing hemodialysis and peritoneal dialysis, it can be said that
A. hemodialysis takes longer than peritoneal dialysis.
B. peritoneal dialysis involves the removal of blood from the patient.
C. hemodialysis is a step closer to the need for transplantation compared with
peritoneal dialysis.
D. peritoneal dialysis doesn’t need a dialyzer to work, whereas hemodialysis does.
Just not real sure about this question I'm thinking A?
To compare hemodialysis and peritoneal dialysis and determine the correct answer to the question, we need to understand the process of each type of dialysis.
1. Hemodialysis:
Hemodialysis is a renal replacement therapy that filters blood through an artificial kidney machine, called a dialyzer. During hemodialysis, the patient's blood is withdrawn via a vascular access (such as an arteriovenous fistula or a central venous catheter) and circulated through the dialyzer. The dialyzer removes waste products and excess fluid from the blood, and the cleaned blood is then returned to the patient's body.
2. Peritoneal Dialysis:
Peritoneal dialysis uses the peritoneal membrane in the abdominal cavity (peritoneum) as a natural filter. A special dialysis solution, called dialysate, is infused into the peritoneal cavity through a surgically placed catheter. The dialysate draws waste products, toxins, and excess fluid from the bloodstream through the peritoneum. After a specific dwell time, the used dialysate, containing waste products, is drained out, and fresh dialysate is infused.
Now, let's analyze each option:
A. Hemodialysis takes longer than peritoneal dialysis:
This statement is not accurate. The duration of hemodialysis and peritoneal dialysis sessions may vary based on individual needs and prescribed treatment plans. Typical hemodialysis sessions can range from 3 to 5 hours, whereas peritoneal dialysis is usually performed continuously throughout the day or during specific periods, often referred to as automated peritoneal dialysis (APD) or continuous ambulatory peritoneal dialysis (CAPD).
B. Peritoneal dialysis involves the removal of blood from the patient:
This statement is incorrect. Unlike hemodialysis, where the patient's blood is externally circulated through a dialyzer, peritoneal dialysis uses the body's own peritoneal membrane to filter waste products and excess fluid. Blood is not removed from the patient during peritoneal dialysis.
C. Hemodialysis is a step closer to the need for transplantation compared with peritoneal dialysis:
This statement requires further clarification. Both hemodialysis and peritoneal dialysis are forms of renal replacement therapy used to treat end-stage kidney disease. The need for transplantation is determined by the patient's overall health condition and the response to dialysis, rather than the specific modality. It is incorrect to claim that one modality is inherently closer to the need for transplantation than the other.
D. Peritoneal dialysis doesn't need a dialyzer to work, whereas hemodialysis does:
This statement is accurate. In peritoneal dialysis, the peritoneal membrane acts as the dialyzer. The dialysate solution that is infused into the peritoneal cavity in peritoneal dialysis allows for the exchange of waste products and excess fluid across the peritoneum. In contrast, hemodialysis requires the use of an external dialyzer machine to filter the blood. The dialyzer in hemodialysis serves as an artificial kidney, performing the filtration function required to remove waste products and excess fluid from the bloodstream.
Therefore, the correct answer to the question is D. Peritoneal dialysis doesn't need a dialyzer to work, whereas hemodialysis does.