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Biomedical subjects

P Mishra

Publications and source records attributed to P Mishra.

At least 73 records · Page 4Linked to original sources
PubMed1987

Alterations in fatty acyl composition can selectively affect amino acid transport in Saccharomyces cerevisiae.

The fatty acid composition of yeast lipid was manipulated by using auxotrophic strain of S.cerevisiae, KD115, which requires unsaturated fatty acid (UFA) for its growth. It was possible to specifically enrich the yeast with different fatty acyl residues. As compared to wild type strain (S288C), the uptake of amino acids viz., L-alanine, glycine, L-glutamic acid, L-valine in KD115 was drastically reduced, however, the uptake of L-leucine and L-lysine was not affected by the change in lipid unsaturation. Kinetic studies revealed that KT and Jmax values for L-alanine were altered whereas for L-lysine they remained unaffected by UFA modification. Furthermore, unsaturation index for wild type cells was found to be fairly constant while it was variable in KD115 supplemented with different UFAs. It is observed that the variation in amino acid permeases activity which was affected by fluctuations in fatty acyl composition corresponds more to degree of unsaturation rather than growth stage of KD115.

Alanine↗
PubMed1985

Buccal morphine--a new route for analgesia?

The analgesic effects of buccal and intramuscular morphine were compared in a prospective, double-blind, double-dummy study in forty patients who experienced pain after elective orthopaedic operations. Each patient simultaneously received a buccal tablet and an intramuscular injection, only one of which contained morphine sulphate (13.3 mg); the patients were randomly allocated to two equal groups so twenty patients received each active preparation. The two preparations produced a similar degree of postoperative analgesia, assessed by the mean reduction in pain score and the pain relief score. Peak plasma morphine concentrations were slightly lower after buccal than after intramuscular administration but they declined more slowly; consequently, the drug's bioavailability was 40-50% greater after buccal than after intramuscular administration. The adverse effects of buccal morphine were generally less than those of intramuscular morphine.

Administration, Oral↗
PubMed1983

Intraoperative bradycardia and hypotension associated with timolol and pilocarpine eye drops.

A 69-yr-old man, who was concurrently being treated with pilocarpine nitrate and timolol maleate eye drops, developed a bradycardia and became hypotensive during halothane anaesthesia. Both timolol and pilocarpine were subsequently identified in a 24-h collection of urine. Timolol (but not pilocarpine) was detected in a sample of plasma removed during surgery; the plasma concentration of timolol (2.6 ng ml-1) was consistent with partial beta-adrenoceptor blockade. It is postulated that this action may have been enhanced during halothane anaesthesia with resultant bradycardia and hypotension. Pilocarpine may have had a contributory effect.

Aged↗
PubMedDate not supplied

Intensive care unit drug utilization in a teaching hospital in Nepal.

OBJECTIVES: The intensive care unit (ICU) is a setting where a large number of drugs are administered to patients and the costs of hospitalization and drug treatment are high. Information on drug utilization in intensive care units (ICUs) are lacking in western Nepal. The present study was carried out to obtain information on the basic demographic pattern of the respondents, drug utilization during the study period, the antibiotic sensitivity patterns of isolated microorganisms and measure drug consumption in defined daily dose (DDD)/ 100 bed-days. METHODS: A retrospective analysis of patients admitted to the ICU of the Manipal Teaching hospital, Pokhara, Nepal during the time period from 01/02/2002 to 31/05/2002 was carried out. The ICU mortality rate, length of stay greater than 7 days and median length of stay were calculated. RESULTS: A total of 259 individuals were admitted. The ICU mortality rate was 15.4%; median length of stay was 4 days. E.coli, H.influenzae, K.pneumoniae, S.aureus and P.aeruginosa were the common organisms isolated and were found to be resistant to some of the commonly used antibiotics. Mean +/- SD number of drugs and cost of drugs were 5.1 +/- 2.7 and 1958.5 +/- 1267.8 Nepalese rupees (25.1 +/- 16.2 US dollars). Total drug consumption was 356.4 DDD/100 bed-days. Consumption of intravenous fluids was 25.8 litres/100 bed-days. CONCLUSIONS: An antibiotic use policy should be framed. Formation of a multidisciplinary team to oversee drug use and periodically review microbial sensitivity patterns will be helpful. Longitudinal surveillance of ICU drug use should be carried out.

Anti-Bacterial Agents↗
PubMedDate not supplied

Ocular side effects of antitubercular drugs - a focus on prevention, early detection and management.

Given the increasing prevalence of tuberculosis, antitubercular drugs frequently used are also associated with ocular toxicity. Ethambutol is the most commonly implicated drug. It is generally well tolerated, but known to cause optic neuritis, more specifically retro bulbar neuritis causing blurred vision, decreased visual acuity, central scotomas, and loss of red-green color vision. The exact mechanism of toxicity is not understood. Though optic neuritis due to ethmabutol is generally considered to be reversible upon prompt discontinuation of the drug, there are reports of reversible toxicity, particularly in the elderly population. Isoniazid can rarely cause retro bulbar neuritis. Dose relationship is usually not seen. Streptomycin is known to cause pseudo tumorcerebri. Thiacetazone can produce severe cutaneous reactions including Steven Johnson Syndrome affecting the skin and mucosa including conjunctiva. Educating the patients for early detection of the ocular manifestations and regular follow-ups are very essential.

Antitubercular Agents↗
PubMedDate not supplied

Medication counseling center in a teaching hospital.

Patient compliance is often not achieved during drug therapy. Many reasons including lack of patients' understanding regarding medication and disease, poor socioeconomic pattern, unavailability of drugs are attributed to this situation. Providing counseling to patients can improve their understanding regarding medication, disease and life style modifications which in turn improves compliance. Medication counseling centers are one of the means to counsel the patients. The study was conducted to analyze the performance of such a center at Manipal Teaching Hospital, a teaching hospital in Western Nepal. Patients were counseled as per the Omnibus Budget Reconciliation Act-1990 guidelines and data were collected from the documentation form of the center and analyzed. Results indicated that 84.5% of the patients were directed to the medication counseling center by the pharmacists. Nearly one quarter of the population was either asthmatic or chronic obstructive pulmonary disease patients. Bronchodilators were found to be the major therapeutic category of drugs and were found in 26.7% of the patients. Among the various counseling aids, placebo inhalers were used in 45.1% of the patients. The counseling pharmacists dedicated an average time period of 6-10 minutes in about 42.1% of the patients. Language was found to be the major barrier while counseling 16.5% of the patients. The study concluded that the medication counseling center can play a definite role in enhancing patients' understanding about medications and disease pattern, which in turn may improve patient compliance.

Adolescent↗
PubMedDate not supplied

Contribution of the regional drug information center towards drug safety.

Drug related complications may lead to huge economic impact and cause significant morbidity and mortality. The present study analyzed the services provided by our Drug Information Center (DIC) in relation to drug safety. Over a period of one year, the DIC received 336 drug related queries. Among these 127 queries were related to drug safety. Medical doctors asked 78% of queries and patient care was the purpose behind 64.6% of them. Half (50%) of the enquirers submitted their queries to the center personally or contacted the DIC staff. Forty one percentage of the queries were related to the causality of particular drug towards adverse drug reactions and 10 % regarding drug use in pregnancy and lactation. Centrally acting drugs accounted for 21% of the queries. Twenty two percentage of the enquirers required an immediate answer. DICs by providing unbiased and objective information can reduce the occurrences of drug related complications.

Adverse Drug Reaction Reporting Systems↗