Drug reactions. XVII. Cutaneous reactions to barbiturates, chloral hydrate and its derivatives.
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Tranquilizers, analgetics and antidepressants are applied in different ranges in the treatment of patients on hemodialysis. Due to many different pharmacokinetic properties, no perfect rules for dosage in acute or chronic hemodialysis exist. Adequate applicable drugs without adaptation disregarding different states of renal failure are such with predominate hepatic metabolism and elimination or with inactive metabolites. In the management of acute renal failure, usually in connection with multiple organic disorders, a nonschematic, individually adapted therapy is indicated. In some substances, therapy can be determined by control of plasma concentration levels, in other drugs dosage is possible exclusively according to clinical effects. Substances with side effects on coagulation or acid-base equilibrium should be avoided. It is recommendable to get well acquainted with one substance out of each group in order to avoid polypragmasy.
A portable radioisotopic technique was developed to demonstrate cerebral circulatory deficit, as part of a collaborative study to define and diagnose cerebral death simply and rapidly, in comatose, apneic patients with electrocerebral silence. The method involves an intravenous injection of 2mCi of 99mTcO4, and recording time/activity curves over the cranial cavity and a femoral artery simultaneously, using twin probe radioisotope detector equipment. Eight comatose, apneic patients had 142 studies in conjunction with clinical electroencephalographic and other laboratory evaluations. The results indicate that the absence of a bolus tracing from the head, as contrasted to the usual bolus seen is indicative of significant circulatory deficit to the cerebrum. This test may be used as an adjunct in confirming the diagnosis of cerebral death. A normal bolus tracing should be simultaneously observed over a femoral artery and this is used as a control. The method is safe and simple and offers significant information about the irreversibility of cerebral blood flow. Although further studies are indicated, the method appears to be most promising as a fundamental bedside laboratory test in the diagnosis of cerebral death in conjunction with other clinical and laboratory criteria.
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Thirty patients complaining of insomnia were studied in a double-blind trial with crossover of Finorgal, nitrazepam and triclofos sodium. Finorgal given as a hypnotic produced similar results to nitrazepam and triclofos sodium in terms of induction of sleep, duration and quality of sleep, dream recall and morning 'hangover'. Reported side-effects were not serious and occurred less frequently in association with Finorgal treatment than with nitrazepam or triclofos sodium. Laboratory investigations gave no indication of the development of any drug toxicity during the three-week period of the trial.
Flexor and extensor postural reflexes are most commonly seen in coma after structural brain lesions, but may also occur in metabolic coma. We report 10 patients who exhibited flexor or extensor posturing as an early and transient feature of coma resulting from sedative drug ingestion. In comatose patients with normal pupillary reactivity but no ocular movements, these postural responses suggest sedative drug overdose.
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Of 415 adult patients treated for acute drug intoxications in a university hospital emergency room, 64 (15.4%) required admission to the medical service for intensive care. A significantly larger proportion of patients over 40 years of age required hospitalization. Forty-eight of the episodes requiring hospitalization were identified as intentional drug intoxication. Women were admitted in 41 (64.0%) instances while men were admitted on 23 (36.0%) occasions. Non-barbiturate depressants, barbiturates, tranquilizers, and antidepressants were the drug classes most commonly incriminated. Almost one-half of all patients, however, had taken multiple drugs. Medical complications in these 64 patients included coma in 43 (67.2%), acute hypertension or hypotension in 21 (32.8%), and pneumonia in 16 (25%). Complications occurring less frequently were cardiac arrest in three (4.7%), anemia in two (3.2%), neuropathies, soft tissue necrosis, quadraplegia, renal failure, bullous dermatitis, and fetal death in one patient each. Two (3.2%) patients died as a result of drug ingestions. Forty per cent of patients had experienced previous episodes of acute drug intoxication.
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