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Biomedical subjects

C K Aaron

Publications and source records attributed to C K Aaron.

6 recordsLinked to original sources

Sympathomimetics.

Sympathomimetics have a long history of abuse. Initially amphetamines were abused for their adrenergic "rush"; now more sophisticated chemists have developed compounds that add a hallucinogenic component. Since the advent of crack and now "ice," the physician needs to recognize and treat appropriately those patients who present with the signs and symptoms of sympathetic hyperactivity.

Ambulatory Care

Efficacy of charcoal cathartic versus ipecac in reducing serum acetaminophen in a simulated overdose.

The traditional role of gastric emptying as the initial step in the management of the poisoned patient has recently been questioned; immediate activated charcoal administration has been recommended by some. In the setting of acetaminophen overdose, ipecac-induced emesis may interfere with subsequent oral antidotal therapy. Therefore, we conducted a study to compare the efficacy of initial therapy with ipecac with therapy with activated charcoal-cathartic in a simulated acetaminophen overdosage. Ten healthy volunteers participated in a randomized, crossover trial. Subjects ingested 3.0 g acetaminophen, followed by either no intervention, 30 mL syrup of ipecac, or 50 g activated charcoal-sorbitol solution at one hour. Serial acetaminophen levels were determined at intervals over eight hours. Both interventions significantly reduced the area under the curve compared with control (P less than .05). When comparing ipecac with activated charcoal-cathartic, no significant difference was noted among these groups.

Acetaminophen

Sorbitol catharsis does not enhance efficacy of charcoal in a simulated acetaminophen overdose.

The use of a 70% sorbitol solution has recently been advocated as an adjunct to activated charcoal. This results in rapid and profuse catharsis that could possibly cause fluid and electrolyte imbalance. An investigation was undertaken to determine if sorbitol catharsis enhanced the antidotal efficacy of activated charcoal. Eight healthy volunteers participated in a randomized, crossover trial. Subjects ingested 3 g of acetaminophen followed by either no intervention, 50 g of plain activated charcoal at one hour, or 50 g activated charcoal-sorbitol solution at one hour. Serial acetaminophen levels were determined at intervals over eight hours and side effects noted. Both interventions significantly reduced the area under the curve versus control (P less than .05). The addition of sorbitol did not enhance the efficacy of activated charcoal but did increase the side effects noted. Sorbitol has not been proven effective in enhancing drug removal and has side effects that can be significant in a poisoned patient. Current data do not warrant its use, and further investigations should be carried out with other ingested drugs.

Acetaminophen

Endotracheal diazepam: absorption and pulmonary pathologic effects.

We conducted a study to evaluate the absorption of endotracheally administered diazepam and the pulmonary pathologic changes induced by its administration. Six cats received diazepam and five cats received saline endotracheally. Serial blood gases and serum diazepam levels were drawn at intervals for 90 minutes after the administration of diazepam. The cats were sacrificed after two days and their lungs were examined by a pathologist. Mean diazepam levels reached a peak two minutes after the administration of diazepam and remained elevated above therapeutic levels for 90 minutes. There was no significant change in pH, PO2, or PCO2 for either group. Histologic examination of the lungs showed a significantly increased incidence of pneumonitis in the diazepam group as compared to the saline group. This study demonstrates that although diazepam is well absorbed when administered endotracheally, it has adverse effects on the lungs that may preclude endotracheal use in the currently available commercial form.

Absorption

A clinical evaluation of the QBCII centrifugal hematology analyzer in the emergency department.

As part of an effort to reduce patient waiting time for laboratory results, the QBCII desktop CBC analyzer was evaluated in an emergency department. CBCs were performed by the emergency department staff (multiple observers) on 498 patients and by a single observer on 250 patients. Time required by the emergency department staff to obtain a CBC was 10.1 minutes compared with 47.8 minutes for the hospital laboratory. Correlation coefficients between hospital laboratory and QBCII were WBC 0.94, hematocrit 0.92, platelets 0.88, lymphocytes/monocytes 0.92, and granulocytes 0.90.

Adult