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.
Assistance needed.
http://en.wikipedia.org/wiki/Dialysis
To determine the correct answer, let's break down each option and analyze it:
A. Hemodialysis takes longer than peritoneal dialysis: To answer this, we need to understand the process of each type of dialysis. Hemodialysis involves removing blood from the patient's body and passing it through a dialyzer machine that performs the filtration process. This procedure typically takes around 3-4 hours and is usually done three times a week. On the other hand, peritoneal dialysis involves the insertion of a catheter into the patient's abdomen, which allows the lining of the abdominal cavity to act as the filtration membrane. Peritoneal dialysis is done at home and can be performed continuously throughout the day or overnight. Although it requires more frequent sessions, each session takes less time compared to hemodialysis. Therefore, option A is incorrect.
B. Peritoneal dialysis involves the removal of blood from the patient: This statement is incorrect. Peritoneal dialysis does not involve the removal of blood from the patient's body. In peritoneal dialysis, a special fluid called dialysate is infused into the abdominal cavity, and waste products and excess fluids are removed through the peritoneal membrane. The blood remains inside the patient's body during peritoneal dialysis. Therefore, option B is incorrect.
C. Hemodialysis is a step closer to the need for transplantation compared with peritoneal dialysis: Both hemodialysis and peritoneal dialysis are forms of renal replacement therapy, which means they are used when the kidneys are no longer functioning properly. Neither of the two methods can cure kidney failure or reverse its progression. The need for transplantation is determined by various factors, such as the patient's overall health, suitability for transplantation, availability of a compatible donor, and preference of the patient. So, option C is incorrect.
D. Peritoneal dialysis doesn't need a dialyzer to work, whereas hemodialysis does: This statement is correct. In peritoneal dialysis, the peritoneal membrane acts as the filtration membrane, eliminating the need for a dialyzer machine. However, in hemodialysis, a dialyzer is used to remove waste products and excess fluid from the blood. The blood is pumped through the dialyzer, which contains a semipermeable membrane, allowing for the exchange of waste products and fluids. Therefore, option D is correct.
In conclusion, the correct answer is option D: Peritoneal dialysis doesn't need a dialyzer to work, whereas hemodialysis does.