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The common indications of liver transplant in children include cholestatic liver disease (most common of which is biliary atresia) and metabolic liver disease followed by acute liver failure. Occasionally it is indicated for liver tumor and certain rare condition.
Certain rare condition such as factor VII deficiency, Protein C and Protein S deficiency and familial hypercholesterolemia.
Willing, family donor with matching blood group. The donor should provide an informed consent and also must undergo psychological evaluation. The donor should be 18-55 years old, weighing 55 – 85kg but not fat, should be healthy with normal liver and kidney functions, HBsAg, HCV and HIV negative. It is very important that the donor liver is not fatty therefore a plain CT scan is performed first to calculate the LAI (liver attenuation index). This should normally be more than 6. One would accept a liver with a positive LAI (as compared to spleen). Occasionally a liver biopsy may be done to rule out fatty liver. The donor undergoes complete evaluation of heart, lungs, kidney and other organs., besides a psychiatric evaluation. A CT scan is carried out on the donor to evaluate vascular anatomy and graft volume. MRI (MRCP) provides information of the biliary ducts.
A CT scan triphasic angiography provides information on the vascular anatomy which is important for the surgeon to know and volumetry is performed on donor liver by using special software which calculates the volume of various parts of the liver.
At least 35% of the liver is left behind with the donor. For this volume calculation CT volumetry is very important.
Most units including ours consider live vaccines to be contraindicated after liver transplant because of the risk of dissemination secondary to immunosuppression. It is therefore better to complete normal immunizations before transplant. These include – BCG, DPT + Hib, Hepatitis B, Measles, MMR. Its suggested to give even optional vaccine such as Hepatitis A, Typhoid, chickenpox, influenza rotavirus and pneumococcal vaccines.The vaccination schedule may be expedited and may differ from the normal recommendations
It is important to ensure that specific hepatic complications are appropriately managed while the patient waits for transplant. These include portal hypertension, oesophageal varices, ascities, hypoproteinemia etc.
It has been demonstrated in several studies that nutritional status at liver transplant is an important prognostic factor in survival, that is better outcome is seen in patients with good nutritional status. The patient needs to be on a high calorie diet (150- 200% calories with good protein intake) with two times the RDA of multi vitamins and in patients with cholestasis supplementation with fat soluble vitamins like vitamin A,D,E,K is done. In patients with cholestasis,MCT oil as in coconut oil is used for cooking. If a child is not able to feed well orally then tube feed supplementation is done, which could be for overnight feeds or during the day as per the need.
The surgery takes 8-10 hours.
The donor operation is started first and soon the recipient operation is started. Both surgeries are going on simultaneously in 2 parallel operating theatres. A part of the liver of the donor (usually the left lobe or the left lateral lobe is used in case of a child and right lobe is used in adolescents / adults). The deceased / bad liver of the patient is removed and the part of donor liver is placed in its place. Three important ligations include that of artery vein and duct and in those with previous Kasai’s portoenterostomy, and small children roux-en-Y-jejunostomy is carried out instead of duct to duct anastomosis.
Following liver transplant the patient requires immunosuppression usually for life long (according to the present consensus). There are 3 drugs, tacrolimus, mycophenolate mofetil and steroids. Steroids are discontinued first followed by mycophenolate mofetil. Thereafter patient is on 1 immunosuppressive drug, usually tacrolimus, which needs to be taken twice a day daily. The patient needs to undergo regular blood tests to monitor the liver functions, kidney functions and immunosuppressive drug levels.
Children who survive liver transplant will usually achieve a normal lifestyle despite the necessity for continuous monitoring of immunosuppressive drug levels. They attend normal school sports, activities etc.
We have completed >200 Pediatric Liver Transplants in small children and are the busiest center in India with success rate of 92% at 1 year and overall success rate of over 90% on a median follow up of >4 years.
Dr. Neelam Mohan is one of the few women doctors in India who has balanced the various pillars of medical profession and is appreciated as an astute clinician/ healer, bright teacher, researcher, efficient leader/ administrator and for her contribution in social work. She has to her credit many achievements that has put the country on the global medical map.
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