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Biomedical subjects

J Dewar

Publications and source records attributed to J Dewar.

49 records · Page 3Linked to original sources
PubMed1981

Granular cell myoblastoma of the common bile duct treated by biliary drainage and surgery.

A young Caucasian woman is described in whom obstructive jaundice was caused by a granular cell myoblastoma of the common bile duct. She was treated by percutaneous transhepatic biliary drainage for 10 days, before radical removal. Granular cell myoblastomas are benign lesions of disputed histogenesis, rare among biliary neoplasms, the excision of which is curative.

Adult↗
PubMed1977

The need and use of a phosphate-enriched dialysate during regular hemodialysis.

A disabling osteomalacic syndrome seen only during regular hemodialysis is described. Its features include skeletal fractures, pain, suppression of pre-existing hyperparathyroidism, and failure to improve with any of the vitamin-D metabolites. Phosphate depletion may be an important etiological factor but this could not explain all cases. A trial with phosphate-enriched dialysate and 1alphaOHD3 resulted in sustained clinical improvement in 54% of the patients and healing of fractures in 33%. Other etiological factors independent of 1,25(OH)2D3 deficiency and phosphate depletion must be considered. Current, indirect evidence suggests that accumulation of water toxins including aluminium may be important.

Adolescent↗
PubMed1977

Ionised calcium during haemodialysis.

In spite of the popularity of high calcium dialysate internationally, most centres in the United Kingdom continue to use a dialysate calcium of 1.5 to 1.6 mmol/L. In eleven patients studied throughout dialysis against such dialysate we conclude that it is sufficient to raise ionised calcium. Patients so treated have little elevation of PTH pre-dialysis and it is further suppressed during dialysis.

Adult↗
PubMed1975

Post-natal developmental changes in the length-tension relationship of cat papillary muscles.

The length-tension relationship and the effect of paired electrical stimulation were studied in right ventricular papillary muscles obtained from cats. The animals were divided into three age groups: neonatal kittens, less than 24 hr of age; infant kittens, 16--18 days of age; and adult cats. 2. The muscles were electrically driven to contract isometrically using field stimulation at 10--20% above the threshold valus. 3. At Lmax the neonatal preparations produced significantly less developed (active) tension than did the adult preparations. The resting tension at Lmax was significantly greater in the neonatal preparations than in the adult ones. The infant group occupied an intermediate position between the two other groups. 4. The response to paired electrical stimulation was less in the neonatal group than in either the infants or the adults. 5. It is concluded that post-natal developmental changes occur in the contractile properties of the myocardium of the cat.

Age Factors↗