DEVELOPMENT OF PERCUTANEOUS DEVICES MADE OF SINTERED HYDROXYAPATITE FOR THE DISABLE ELDERLY

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Percutaneous devices consisting sintered hydroxyapatite skin button and silastic connecting tubes were developed for improvement of daily activities of the disabled elderly mainly because of neurological diseases who cannot orally eat by themselves, or have urinal incontinence.Three patients having been fed through nasogastric tubing were operatively implanted with the percutaneous devices for enteric fistula. They all were successfully fed through the fistula but enteric feeding ended in interruption within 3 months because of the denuded skin button flange due to misadaptation to the overlying skinTwo young pigs were implanted in their neck with the percutaneous devices connecting the bladder with a silastic tube underlying the skin for cystic fistula. Urine drainage through the devices was failed in 2 and months later, respectively, because of occlusion of tube with urine stone formation.An intraperitoneal indwelling catheter consisting of blind-ended microporous PVA hollow fiber and PVC tubing and having the skin button was developed for daily injection site of insulin especially for the aged diabetics.In conclusion, improvement of the device design and development of new material resistant to urine stone formation in the bladder are necessary. Further research has to be carried out for better QOL of the disabled elderly.