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Biomedical subjects

K Ogle

Publications and source records attributed to K Ogle.

8 recordsLinked to original sources
PubMed2001

Hyaluronan modifies inflammatory response and peritoneal permeability during peritonitis in rats.

The effect of high-molecular-weight hyaluronan (HA) on peritoneal and systemic inflammation and peritoneal permeability to water and solutes was studied during endotoxin-induced peritonitis in rats. Acute peritonitis was induced by adding lipopolysaccharide (LPS) to the dialysis fluid (Dianeal 3.86; Baxter Healthcare, Ireland, Castlebar). HA was added to the dialysis solution in a concentration of 10 mg/dL. During 4- and 8-hour dwells of the dialysis fluid, we studied the intensity of peritoneal (dialysate) and systemic (blood) inflammation (dialysate cell count and differential, cytokine and HA levels), as well as the transperitoneal transport of solutes and water. In rats, the addition of LPS to the dialysis fluid induced changes in inflammatory reaction and transperitoneal transport similar to those seen in continuous ambulatory peritoneal dialysis patients with peritonitis. During peritonitis, the addition of HA to the dialysis fluid reduced the loss of ultrafiltration, which resulted in a greater peritoneal creatinine clearance during the 8 hours of dwell (29.9 +/- 6.7 mL/8 h in the HA-LPS group versus 19.7 +/- 7.8 mL/8 h in the LPS group; P < 0.05). Dialysate interferon-gamma (INF-gamma) levels during peritonitis were greater in HA-treated animals (536.8 +/- 296.6 pg/mL in the HA-LPS group versus 169.8 +/- 137.8 pg/mL in the LPS group; P < 0.05). Dialysate elastase activity increased during peritonitis (44.4 +/- 9.3 versus 14.2 +/- 4.1 U/mL in peritonitis-free rats); during peritonitis, the increase in dialysate elastase activity was less pronounced in the rats that had HA in the dialysate (27.3 +/- 4.1 U/mL versus the LPS group; P: < 0.01). We conclude that HA added to the dialysis fluid reduces loss of ultrafiltration during peritonitis in rats. In the presence of HA dialysate, INF-gamma levels during peritonitis increased, whereas elastase activity decreased; these changes might improve the peritoneal immune reaction during peritonitis and at the same time prevent peritoneal membrane injury.

Acute Disease↗
PubMed2000

Evaluation and validation of virus removal by ultrafiltration during the production of diaspirin crosslinked haemoglobin (DCLHb).

Virus retention during ultrafiltration through A/G Technology filter cartridges was investigated to characterize the removal process and validate the degree of virus titre reduction during the filtration of red blood cell haemolysates performed as part of the production of diaspirin crosslinked haemoglobin (DCLHb). When viruses were suspended in phosphate buffered saline solution, retention was greater with larger sized viruses and smaller filter pore size. Virus titre was maintained at starting levels in the filter retentate circuit during the course of filtration, suggesting that the virus removal mechanism is predominantly size exclusion. Evaluation of specific processing variables indicated that the retention of phiX174 virus was increased in the presence of red blood cell haemolysate or at high membrane crossflow rates and transmembrane pressures, while the retention of EMC virus was less sensitive to variations in these parameters. Using these results to design a validation protocol, log reduction values of >7.9 were demonstrated for the retention of human immunodeficiency virus, pseudorabies virus and bovine viral diarrhoea viruses, 7.6 for hepatitis A virus, and 4.2 for porcine parvovirus. It was also shown that the retention of viruses was maintained during repetitive use of the same filter cartridge.

Animals↗
PubMed1994

Patterns of predeath service use by dementia patients with a family caregiver.

OBJECTIVE: To describe site of death and patterns of predeath service use (hospital, nursing home, and in-home services) among persons with dementia who have a family caregiver. DESIGN: Family caregivers who experienced the death of their relative while participating in a 5-year longitudinal study were surveyed retrospectively about service use patterns in the 90 days before the death of their relative. SETTING: Community. SUBJECTS: Eighty-two family caregivers of a person with dementia who experienced the death of their relative while participating in a longitudinal study (n = 326) were included in this analysis. All participants were providing care to a relative with dementia in the home at entry into the study. MAIN OUTCOME MEASURES: Survey items were used to identify site of death and measure use of the following services in the 90 days before death: hospital, nursing home, skilled nursing services, home health aides, and physician home visits. RESULTS: Sixty-nine percent of the caregivers were spouses, and 28% were adult children. Family caregivers had been providing care for an average of 6 years (SD = 3.9) before the death of their relative. The most frequent setting for patient death was home (42%), followed by nursing home (32%) and hospital (26%). The average number of days spent at home in the 90 days before death by the sample was more than 60 days. Thirty-four percent of the dementia patients were cared for exclusively in the home in the 90 days before death, and 34% spent more than half of the 90 days before death at home. Hospital stays were brief, and less than one-fourth of the sample spent all of the 90 days before death in an institutional setting. Twenty-one percent of the sample used no in-home services in the 90 days before death, 48% of the sample did not use skilled nursing services, and only 27% received a physician home visit. CONCLUSIONS: The results of this study suggest that dementia patients who have a family caregiver receive a significant proportion of their care at home in the 90 days before death. A hospice approach may help address the needs for assistance of families who provide terminal care in the home for a relative with dementia.

Aged↗
PubMed1992

Osteoptysis: a complication of cervical spine surgery.

The case is described of a lady who developed dysphagia and dysphonia misdiagnosed first as hysteria, then as myasthenia gravis, one year after a Cloward's operation for cervical disc disease. After a bout of coughing the bony dowel was expelled and the correct diagnosis was made.

Adult↗