Massive obstetrics haemorrhage: our experience

Background: The aim of the study was to analyze the clinical profile, treatment modalities and outcome of patients with massive obstetric haemorrhage.Methods: All patients who delivered in the department of Obstetrics and Gynaecology PSG Institute of Medical Sciences, Coimbatore between Jan 2012 to Dec 2012 were analyzed. There were 2339 deliveries in this period. Of these there were 17 patients with serious obstetric haemorrhage who required blood transfusion giving an incidence of 0.73%. All the patients who fulfilled the criteria of massive obstetric haemorrhage were analyzed.Results: Past Of the 2339 deliveries from Jan 2012 to Dec 2012 there were 17 patients with serious haemorrhage. Out of these four patients who had massive obstetric haemorrhage are presented in this study.Conclusions: Obstetric haemorrhage continues to be the leading cause of maternal mortality in India. Initial resuscitation with simultaneous identification of the cause and definitive treatment is important

The MVA Priority Approximation

A Mean Value Analysis (MVA) approximation is presented for computing the average performance measures of closed-, open-, and mixed-type multiclass queuing networks containing Preemptive Resume (PR) and nonpreemptive Head-Of-Line (HOL) priority service centers. The approximation has essentially the same storage and computational requirements as MVA, thus allowing computationally efficient solutions of large priority queuing networks. The accuracy of the MVA approximation is systematically investigated and presented. It is shown that the approximation can compute the average performance measures of priority networks to within an accuracy of 5 percent for a large range of network parameter values. Accuracy of the method is shown to be superior to that of Sevcik's shadow approximation

On the occurrence of Decapterus macrosoma in trawl catches at fisheries harbour, Cochin

The scads (Decapterus spp.) locally known as 'Thiriyan' forms an important carangid fishery in 'trawls' at Fisheries Harbour, Cochin contributing about 45.09 and 60.67 % of the carangids caught in trawls during 1987 and 1988 respectively. D. macrosoma contributed upto 50% of the catches with the maximum catch per effort of 44.50 kg. This species represented by an abundant catch of juveniles and sub adults also contributing upto an estimated catch of 2,941 kg (catch/effort: 17 kg)

Detection of virulence determinants and its association with drug resistance in clinical isolates of Pseudomonas aeruginosa

Background: Pseudomonas aeruginosa is most commonly noted significant nosocomial pathogen, because of its distribution, of multi drug resistance and expression of various virulence factors. This study was aimed to detect various resistance mechanism and virulence factors of Pseudomonas aeruginosa and to determine the significant association between them.Methods: A total of 203 clinical isolates of Pseudomonas aeruginosa were included in this study. All isolates were detected for various virulence factors like Phospholipase, Hemolysin, Gelatinase and DNAse. Screening of β-lactamase like extended spectrum beta-lactamase (ESBL), AmpC beta-lactamase and Metallo β-lactamase (MBL) of Pseudomonas aeruginosa were also done.Results: Of total 203 isolates of Pseudomonas aeruginosa studied, 103 were from pus, 50 each from urine and respiratory samples. Virulence factors distribution of Pseudomonas aeruginosa showed 80.3% ,70% , 71.4% , 44.8% and 34% were positive for hemolysin, phospholipase, gelatinase, DNAse and biofilm production respectively. Study on prevalence of various β-lactamase in Pseudomonas aeruginosa isolated showed 25.6%, 24.1% and 10.3% were ESBL, MBL and AmpC producers respectively.Conclusions: This study suggests that production of virulence factors may not be significantly associated with antibiotic resistance. However, expression of certain virulence factors, most notably hemolysin and DNAse activity were significantly associated with β-lactamase production. Hence forth, future trends in clinical microbiology laboratories should focus on development of tests for the rapid detection of the most important virulence markers in addition to identification of pathogens and susceptibility pattern

Search for optical bursts from the gamma ray burst source GBS 0526-66

Attempts were made to detect optical bursts from the gamma-ray burst source GBS 0526-66 during Dec. 31, 1984 to Jan. 2, 1985 and Feb. 23 to Feb. 24, 1985, using the one meter reflector of the Kavalur Observatory. Jan. 1, 1985 coincided with the zero phase of the predicted 164 day period of burst activity from the source (Rothschild and Lingenfelter, 1984). A new optical burst photon counting system with adjustable trigger threshold was used in parallel with a high speed photometer for the observations. The best time resolution was 1 ms and maximum count rate capability was 255,000 counts s(-1). Details of the instrumentation and observational results are presented

X-ray variability of GRS 1915+105 during the low-hard state observed with the Indian X-ray astronomy experiment (IXAE)

The galactic superluminal transient X-ray source GRS 1915+105 was observed with the pointed proportional counters (PPCs) onboard the Indian satellite IRS-P3 during 1996 July 23-27. We report here details of the behavior of this source during the relatively quiet and low luminosity state. Large intensity variations by a factor of 2 to 3, generally seen in black-hole candidates, are observed at a time scale of 100 ms to few seconds. No significant variation is detected over larger time scale of minute or more. The intensity variations are described as sum of shots in the light curve, and the number distribution of the shots are found to be exponential function of the fluence and duration of the shots. The cross correlation spectrum between 6-18 keV and 2-6 keV X-rays is found to have asymmetry signifying a delay of the hard X-rays by about 0.2 to 0.4 sec. This supports the idea of hard X-rays being generated by Compton up-scattering from high energy clouds near the source of soft X-rays. Very strong and narrow quasi periodic oscillations in the frequency range 0.62 to 0.82 Hz are observed. We discuss about a model which explains a gradual change in the QPO frequencies with corresponding changes in the mass accretion rate of the disk.Comment: 14 pages including 6 figures. To appear in Astronomy and Astrophysics Supplement Serie

Serial polygyny in Ropalidia marginata: implications for the evolution of eusociality

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