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Ch.9 Solutions
Chapter 9, Problem 101

Research information related to dialysis and answer the following questions: What is the difference between hemodialysis and peritoneal dialysis?

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1
Understand that dialysis is a medical process used to remove waste products and excess fluid from the blood when the kidneys are not functioning properly.
Recognize that there are two main types of dialysis: hemodialysis and peritoneal dialysis.
Hemodialysis involves filtering the blood through a machine called a dialyzer, which acts as an artificial kidney. Blood is drawn out of the body, cleaned in the machine, and then returned to the body.
Peritoneal dialysis uses the lining of the abdomen, called the peritoneum, as a natural filter. A special fluid is introduced into the abdominal cavity, which absorbs waste products and excess fluids, and is then drained away.
Compare the two methods: Hemodialysis typically requires visits to a dialysis center and is done several times a week, while peritoneal dialysis can often be done at home and on a more flexible schedule.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Hemodialysis

Hemodialysis is a medical procedure that uses a machine to filter waste and excess fluids from the blood when the kidneys are unable to perform this function. During the process, blood is drawn from the body, passed through a dialyzer (artificial kidney), and then returned to the body. This treatment typically occurs in a clinic or hospital setting and usually requires sessions lasting about three to five hours, three times a week.

Peritoneal Dialysis

Peritoneal dialysis is a home-based treatment that uses the lining of the abdomen, known as the peritoneum, as a natural filter to remove waste and excess fluids. A sterile solution is introduced into the abdominal cavity through a catheter, allowing waste products to diffuse into the solution, which is then drained away. This method can be performed manually or with a machine and offers greater flexibility and independence for patients.

Dialysis Differences

The primary differences between hemodialysis and peritoneal dialysis lie in their methods and settings. Hemodialysis requires a machine and is typically done in a clinical environment, while peritoneal dialysis can be performed at home and utilizes the body's own peritoneal membrane. Additionally, hemodialysis is generally more time-intensive per session, whereas peritoneal dialysis allows for continuous treatment throughout the day or night.
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