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Biomedical subjects

J King

Publications and source records attributed to J King.

At least 505 records · Page 28Linked to original sources
PubMedDate not supplied

Effect of hepatic artery chemotherapy on survival of patients with hepatic metastases from colorectal carcinoma treated with cryotherapy.

Thirty-eight patients with unresectable multiple liver metastases from colorectal carcinoma were treated with either hepatic artery chemotherapy (HAC) and cryotherapy (n = 27) or cryotherapy alone (n = 11). Follow-up survival data were summarized using Cox regression. Allowing for the effect of the pathology of the primary tumor and the preoperative carcinoembryonic antigen (CEA) level, those patients who did not receive HAC after cytoreduction were three times as likely to die as those given HAC (RR 3.3, 95%; CI 1.2-9.3). The estimated median survival of patients treated with cryotherapy alone was 245 days, whereas for those given more than 3 months of HAC plus cytoreduction therapy it was 570 days. It is recommended that all patients who receive cryotherapy for multiple liver metastases from colorectal rectal carcinoma be given subsequent hepatic artery chemotherapy.

Adult↗
PubMedDate not supplied

Effects of oxygen on recombinant protein expression.

Efforts to increase cell growth and protein yields need to be complemented by the maintenance of the quality of the protein produced. Elevated oxygen pressure or rapid increases in oxygen content can cause oxidative stress within the cells, leading to oxidation of specific proteins and nucleotide sequences. In addition, transient or steady-state anoxic conditions can cause limitations in amino acid production and plasmid stability. Major pathways and mechanisms of oxidative damage to proteins expressed in bacteria are reviewed. Damage to nucleic acids involved in gene expression also is considered. The methodologies for identifying oxidative damage to macromolecules are improving but are not yet adequate for on-line feedback. This limits our ability to integrate information about these phenomena and the cellular responses into a quantitative model. Enough information is available, however, to consider changes in the time profile of dissolved oxygen as a cause for poor process performance.

Amino Acids↗
PubMedDate not supplied

Results of spinal fusion for radiation scoliosis.

There were 150 children with neuroblastoma and 183 children with Wilms' tumor who received radiation therapy, orthovoltage up to 1967, and cobalt therapy thereafter. In all except two cases, radiation therapy crossed the midline. Of all of the children treated, 13 required spinal fusion. There were six with Wilms' tumor; three had kyphosis; and three had scoliosis. Nine fusions were done with three pseudoarthroses, one broken rod, and two hook pullouts. There were seven with neuroblastoma, of whom five had kyphosis and two had scoliosis. Nineteen spinal fusions were done on these seven patients for neuroblastoma; two developed paraplegia; seven had pseudoarthroses; two had broken rods; and one had infection. Complications were attributed to laminectomies (five of seven) and high orthovoltage dosage (3680 rad), causing bone death and destroyed bone growth, with resultant infantile-size spines. The authors continue to follow up postradiation patients and observe rapid deterioration of kyphosis and scoliosis during the adolescent growth spurt. The authors now recommend early and extensive combined two-stage, long anterior and posterior fusions for kyphosis of 35 degrees and over, and a posterior fusion with Harrington rod instrumentation with extensive bone grafting is done for early (35 degrees) pure scoliosis. Postoperative immobilization is much longer than for regular spine fusions--at least one year.

Child↗
PubMedDate not supplied

Conventional and sprinkler needle injection of magnesium insulin.

Currently available short-acting insulin preparations fail to mimic the postprandial insulin profile of non-diabetic individuals. The activity of a novel insulin designed for faster absorption has been tested after subcutaneous injection. Magnesium insulin (50 U ml-1) given by sprinkler needle was compared with unmodified human insulin (100 U ml-1) given by conventional needle and unmodified human insulin (50 U ml-1) given by sprinkler needle in normal volunteers using a euglycaemic clamp. Magnesium insulin had a significantly faster onset of action resulting in a higher exogenous insulin level by 15 min, peak level was reached after 60 min compared with 75 min for the unmodified insulins, and duration of action was significantly shorter than both unmodified insulins. No significant differences were observed between the unmodified insulins for the first 5 h after injection, indicating that the observed differences to magnesium insulin could not be attributed to the insulin concentration or the type of needle used for insulin administration. Injection of magnesium insulin prior to a test breakfast in people with Type 2 diabetes resulted in significantly lower total and 0 to 120 min areas under the glucose curve, an earlier rise in exogenous insulin levels and a higher area under the insulin curve from 0 to 120 min compared with unmodified 100 U ml-1 human insulin.

Adult↗
PubMedDate not supplied

A retrospective study of 77 cats with severe hepatic lipidosis: 1975-1990.

The physical, clinicopathologic, and survival rates of 77 cats with severe spontaneous hepatic lipidosis are detailed in this report. Cats were subdivided into groups designated as idiopathic lipidosis if no other disease process was recognized, or secondary lipidosis if another disease process was diagnosed. Cats were also subdivided into groups designated as survivors or nonsurvivors on the basis of successful recuperation at 4 months after initial diagnosis. Differences between disease and survival groups were evaluated for significance. Overall, more female cats and middle-aged cats were affected. Presenting complaints of vomiting, anorexia, weakness, and weight loss were common. Physical assessment of most cats showed obvious hepatomegaly, jaundice, dehydration, and a weight loss > or = 25% of usual body weight. Neurobehavioral signs indicative of hepatic encephalopathy, other than ptyalism and depression, were rare. Clinicopathologic features are characterized by hyperbilirubinemia and increased activities of serum ALT, AST, and ALP, with only small if any increase in gamma GT activity. Clinical features distinguishing cats with hepatic lipidosis from those with other serious cholestatic disorders include absence of hyperglobulinemia and low gamma GT activity relative to ALP activity. Although coagulation tests were abnormal in 45% of cats tested (n = 44), few cats showed clinical bleeding tendencies. Most cats received prophylactic vitamin K1 therapy. Forty two cats received aggressive nutritional and supportive care and of these 55% survived. Cats with idiopathic disease were significantly younger, had significantly higher ALP activity and bilirubin concentration, and had a slightly better survival rate than cats with secondary lipidosis. Low PCV, hypokalemia, and an older age were significantly related to nonsurvival. Because of the variety of diets and food supplements used in case management, the influence of nutritional factors on survival could not be evaluated.

Animals↗
PubMedDate not supplied

Open and closed kinetic chain exercises in the early period after anterior cruciate ligament reconstruction. Improvements in level walking, stair ascent, and stair descent.

Thirty-seven patients who had undergone anterior cruciate ligament reconstruction were tested in a gait analysis laboratory at 2 and 6 weeks after surgery. Between test sessions, patients were randomly assigned to a course of either closed or open kinetic chain resistance exercises (3 sessions per week for 4 weeks). Gait analysis consisted of bilateral calculations of knee joint angle, moment, and power during level walking, stair ascent, and stair descent. An analysis of variance on the effects of training group and test session indicated that the only variable to be significantly affected by the type of exercise program was the amount of knee flexion at the beginning of step-up (P < 0.05). All other measures of knee angle, moment, and power (16 total variables) showed no significant difference between the exercise groups. All variables measured on the injured side showed significant improvement from test 1 to test 2 (P < 0.05), but the injured leg remained functionally deficient when compared with the uninjured leg. These data suggest that there are no clinically significant differences in the functional improvement resulting from the choice of open or closed kinetic chain exercises in the early period after this surgery.

Analysis of Variance↗
PubMedDate not supplied

The effects of methylprednisolone on the complications of coronary artery surgery.

Complications of coronary artery surgery were analyzed in a prospective controlled study of 150 patients, one group receiving methylprednisolone before temporary cardiopulmonary bypass. The patient population was comparable in both the groups. The number of deaths were the same in both the groups, myocardial infarction and cardiac arrhythmias were definitely lower in the Solu-Medrol group. Cerebral vascular accidents were higher in the control group and there were none in the drug treated group. Incidences of pulmonary embolism was reduced by the drug. Oxygen consumption by the tissues was higher in the Solu-Medrol treated group. There were no known complications of the drug, such as stress ulcer and infection. One patient did receive prophylactic antibiotics. Solu-Medrol was deliberately given in patients who were known to have uncomplicated duodenal ulcer. Post-operative bleeding in patients with duodenal ulcer was not noted. This could be explained due to the short acting nature of Solu-Medrol. We feel that Solu-Medrol does minimize serious sequelae of heart-lung machine in coronary artery surgery.

Arrhythmias, Cardiac↗
PubMedDate not supplied

Diabetes microvascular complications in prepubertal children.

These are the baseline findings of a group of 68 prepubertal children enrolled in a longitudinal study of the development of early diabetes microvascular complications prior to gonadarche. The median age of the children was 9.8 years, the median diabetes duration 3.6 years and the mean HbA1c 8.4%. Mild nonproliferative retinopathy was present in 6 of 67 (9%) children, assessed by 7-field stereoscopic fundus photography. Those with retinopathy had higher total cholesterol (p < 0.05) and lower DHEAS (p < 0.01). Albumin excretion rate (AER) was calculated as the mean of three overnight consecutive urine collections. AER > 7.5 micrograms/min was present in 5 of 64 (8%), and one boy had a mean AER > 15 micrograms/min. Those with AER > 7.5 micrograms/min had higher diastolic blood pressure and diastolic blood pressure percentiles (p < 0.05). Longitudinal study of this cohort will establish which factors in the prepubertal years are important for the development of diabetes microvascular complications.

Albuminuria↗