Problem 135 - Objective Biology for NEET

Question

Which of the following is true about renal transplantation? (a) Kidney transplantation is the ultimate method at the stage where drug or dialysis do not help. (b) Immunosuppressive agent are used in kidney transplant patient. (c) Close relatives are often used as kidney donors to minimise the risk of rejection. (d) All the above

Step-by-Step Solution

Answer

(d) All of the above

Step 1: Identify the nature of Kidney Transplantation

Understand that Kidney transplantation is often the ultimate method when other treatments such as drugs or dialysis do not help. This falls in line with statement (a).

Step 2: Recognize the use of Immunosuppressive agents.

Understand that individuals who undergo kidney transplantation require immunosuppressive agents to prevent their body from rejecting the new organ. This corresponds with statement (b).

Step 3: Understand the preference for donors.

Recognize the common practice of using close relatives as kidney donors. This is done to increase the chances of the body accepting the donor organ and minimize the risk of rejection. This is related to statement (c).

Key Concepts

Kidney Transplantation

Kidney transplantation is a life-saving procedure for patients with end-stage renal disease, a condition where the kidneys can no longer function on their own. For those for whom dialysis, which is a treatment that artificially removes waste products and excess fluid from the blood, is no longer effective or sustainable, transplantation offers a chance at a longer and improved quality of life.

During the surgical procedure, a healthy kidney from a donor is placed into the body of the receiver. The transplanted organ takes over the function of the failing kidneys. However, this is a complex treatment option that requires careful consideration of medical, psychological, and lifestyle factors. The success of the transplant depends on several factors, including the compatibility between donor and recipient and the recipient's ability to follow the lifelong regimen of medication and healthcare supervision.

Immunosuppressive Agents

Immunosuppressive agents play a crucial role in the success of a kidney transplant. These medications are designed to suppress the immune system's natural response to what it sees as a foreign invader — in this case, the new kidney. Without these agents, the body's immune defenses would likely attack the transplanted organ, leading to rejection.

To strike a balance, a regimen of immunosuppressive drugs is tailored for each patient to prevent rejection while also minimizing side effects. These drugs need to be taken for the life of the transplanted organ. It's a delicate balance; too much immunosuppression can leave a patient vulnerable to infections and other health issues, while too little increases the risk of organ rejection.

Organ Rejection

Organ rejection is a constant concern following kidney transplantation. It occurs when the recipient's immune system identifies the transplanted kidney as foreign and mounts an attack against it. Clinicians differentiate between different types of rejection: hyperacute, acute, and chronic rejection, based on when they occur post-transplant.

Signs of rejection

Recognizing the signs of organ rejection early is vital, including tenderness at the transplant site, fever, a decrease in urine output, and elevated creatinine levels in the blood. Routine follow-ups and monitoring are necessary so that adjustments to immunosuppressive medication can be made swiftly to treat or prevent rejection.

Donor Compatibility

Donor compatibility is a make-or-break factor in the success of kidney transplantation. It includes blood type compatibility and tissue typing. A close match between the donor and recipient's human leukocyte antigen (HLA) tissue markers is ideal, as it makes it less likely for the body to reject the kidney.

Family Donors

Typically, close relatives often make suitable donors as they are more likely to share similar genetic markers; however, non-relatives can also be excellent matches. As mentioned, close relatives are often used as kidney donors to minimize the risk of rejection. Finding the most compatible donor possible is key to the long-term functioning of the transplant kidneys and requires meticulous testing and matching.