Search PubMed⌕ Search

Biomedical subjects

D Kumar

Publications and source records attributed to D Kumar.

At least 451 records · Page 25Linked to original sources
PubMedDate not supplied

Toxicity evaluation of two treatment regimens for cyanide poisoning.

Toxicological evaluation of two recently reported treatment protocols for cyanide--SN (sodium nitrite) + DMAP (4-dimethylaminophenol) and SN + HA (hydroxylamine)--was carried out in male rats. Both treatments produced transient hyperammonaemia and decreased mean arterial pressure. Heart rate decreased and respiratory rate increased, but these changes reached the level of significance only after SN + HA. Histopathological lesions in lung, liver (SN+HA) and kidney (SN+DMAP) were predominantly in the vicinity of blood vessels. The results indicate toxic effects in both treatment groups at a dose known to induce methaemoglobin concentration to the level of antidotal efficiency in cyanide intoxication.

Aminophenols↗
PubMedDate not supplied

Acute toxicity studies of alpha-ketoglutarate: a promising antidote for cyanide poisoning.

Recently we have shown that cyanide poisoning by the oral (p.o.) route could be antagonized significantly by pretreatment or simultaneous treatment of alpha-ketoglutarate (alpha-KG), administered p.o. in rodents. The protective effect of alpha-KG was dose dependent (0.125-2.0 g kg(-1)) and the effect was significant at a dose above 1.0 g kg(-1). In order to establish the safety of alpha-KG, various haematological, biochemical and histological parameters were studied following p.o. administration of 2.0 g kg(-1)alpha-KG in female rats, and various physiological parameters were studied following p.o. administration of 2.0 or 4.0 g kg(-1)alpha-KG in anaesthetized male rats. The p.o. LD(50) of alpha-KG in male and female rats was >5.0 g kg(-1) and no toxic signs were observed in the surviving animals. Except for an increase in plasma alkaline phosphatase and urea levels after 1 h and a decrease in inorganic phosphorus levels after 7 days of treatment, no significant change in haematology, biochemistry or histology of the vital organs were observed. Mean arterial pressure and neuromuscular transmission were decreased at 4.0 g kg(-1)alpha-KG but other physiological variables such as heart rate, respiratory rate, rectal temperature, left ventricular pressure (systolic), arterial pressure (systolic) and arterial pressure (diastolic) were not altered. The changes observed at 4.0 g kg(-1)alpha-KG are unlikely to be of toxicological concern. The results indicate that alpha-KG at 2.0 g kg(-1) (p.o.)-a dose offering maximum antidotal efficacy-is non-toxic and therefore can be considered suitable for cyanide poisoning.

Administration, Oral↗
PubMedDate not supplied

Patterns of fluid accumulation in splenic trauma: demonstration by CT.

Detection of hemoperitoneum in splenic trauma is as important as detection of the visceral injury itself. Observation of a consistent spectrum of fluid accumulation in patients with splenic trauma prompted us to investigate the patterns in more detail. Twenty-three computed tomographic (CT) scans in 20 patients were evaluated with respect to presence of fluid collections in various peritoneal and retroperitoneal compartments. These were correlated with severity of injury and operative and pathologic findings. Hemoperitoneum was detected in the pelvis (65%), paracolic gutters (52%), left subphrenic space (48%), perihepatic space (48%), Morison's pouch (17%) and in the lesser sac (9%). In addition to free fluid, pleural fluid (39%) and retroperitoneal hematoma in the left anterior pararenal space (13%) were also encountered. These ancillary findings may help to substantiate the diagnosis of splenic trauma in equivocal cases, particularly when the spleen itself is obscured by artifacts. Early detection may reduce mortality and morbidity associated with splenic trauma.

Hemoperitoneum↗
PubMedDate not supplied

Lymphoepithelial cyst of the pancreas.

Lymphoepithelial cyst of the pancreas is a rare lesion which may mimic a pancreatic pseudocyst or mucinous cystic neoplasm. To our knowledge, this lesion has never been reported in the radiologic literature. We present a patient with lymphoepithelial cyst of the pancreas, and we discuss the radiographic and pathologic findings.

Aged↗
PubMedDate not supplied

Recognition and management of ARI--a KAP study on private medical practitioners.

We interviewed 113 private medical practitioners (PMPs) of all system of medicine in Ambedkar Nagar area of South Delhi to determine as to how they recognise and treat Acute Respiratory tract Infections (ARI) in children, in particular, pneumonia. Allopathic PMPs reported viruses and bacteria as causes of ARI as compared to PMPs of other system of medicine who often reported exposure to cold, change in weather and dietary habits as a cause of ARI. Sixty-eight PMPs out of 113 did not count the respiratory rate (RR) in children with ARI and among those who counted, only 19.5% PMPs could correctly tell the normal RR in children aged less than two months. In children aged 2-12 months, the percentage of PMPs responding correctly was 15.0%. Relatively greater proportion of PMPs (31.8%) could correctly tell the normal respiratory rate in children aged 1-5 years. X-ray to diagnose pneumonia was suggested by 102 (90.3%) PMPs. Majority of PMPs prescribed some form of medication including antibiotics for the treatment of cough and cold. Eighty-seven (77%) PMPs prescribed antibiotics, 53 (46.9%) antihistaminics and 49 (43.4%) prescribed allopathic cough syrups to treat cough and cold. For pneumonia, 108 (96.4%) PMPs prescribed antibiotics and 31 (27.7%) PMPs prescribed steroids among other things.

Adrenal Cortex Hormones↗