Showing papers by "Qatar Airways published in 1997"
TL;DR: High proportion of small muscular ventricular septal defects discovered before the time of their spontaneous closure, referral to and follow up by a single group of pediatric cardiologists, location of the pediatric cardiology service in the same setting where nearly all of the deliveries took place, freely available health care service, and echocardiographic examination of every child with a clinical diagnosis of congenital heart disease.
67 citations
TL;DR: Thirty-seven episodes of hospital-acquired candidaemia, which occurred over a two-year period, were reviewed and the predominant risk factors were previous antibiotic therapy, indwelling central venous catheter, and preceding surgery.
26 citations
TL;DR: It may be concluded that among the contributing factors, for the improvement in the incidence and sequelae of a rheumatic episode, are an advantaged socioeconomic environment and accessibility to unlimited medical care.
Abstract: An eleven-year study of the incidence and consequences of acute rheumatic fever was carried out in a country in which a uniform climate together with national characteristics of insularity, wealth, and unrestricted access to free medical care contribute prominently to the epidemiologic milieu Study subjects were 86 children, aged four to fourteen years, satisfying criteria for acute rheumatic fever Study methods included clinical evaluation, standard laboratory studies, and echocardiography A declining incidence of rheumatic episodes, ranging from 106 to 186/100,000 population (average 112/100,000), was identified The course of the episode was generally mild Arthritic findings predominated (92%), followed by carditis identified clinically in 43% and, with the addition of echocardiography, in 71% Residual valvular regurgitation, as a longer term consequence, persisted in 46% of those with auscultatory confirmation of valvulitis No recurrences were identified Comparison with countries of similar socioeconomic status revealed relatively unimportant differences Comparison with nearby disadvantaged countries identified striking contrast It may be concluded that among the contributing factors, for the improvement in the incidence and sequelae of a rheumatic episode, are an advantaged socioeconomic environment and accessibility to unlimited medical care
19 citations
TL;DR: Genotype and allele frequencies of HLA DQα locus were determined in a Qatari population sample using polymerase chain reaction (PCR) amplified DNA fragment and hybridization to allele specific oligonucleoid probes in a reversed dot blot format to provide a complete fit to the Hardy–Weinberg equilibrium.
6 citations
1 Jan 1997
TL;DR: In this article, the authors describe the wellbore and equipment design concepts utilized, the equipment innovations made, equipment installation philosophy and results, and the equipment performance realized to date for the monobore completions in Qatar's offshore North Field.
Abstract: Producing gas from the Khuff formation in Qatar's offshore North Field presents several completion design challenges. The North Field Khuff formation is a competent limestone / dolomite that is estimated to contain a GIIP of 504 x 10 12 scf (504 TCF), which makes it the largest single accumulation of natural gas in the world. The North Field Khuff gas contains hydrogen sulfide and carbon dioxide concentrations of approximately 5,000 ppm and 2.5 mole percent, respectively. Initial condensate yields exceed 40 bbl/MMscf. For design purposes, brine water production was taken into account when making the metallurgical choices for the completion equipment. The producing interval, Khuff K-4 at a datum of 9,400 ft. subsea has a bottom hole temperature of 222°F, and an initial shut-in bottom hole pressure of 5,265 psi. Actual well deviations range from vertical to slightly over 60° from vertical, but all completion equipment was designed and tested to function properly in horizontal wells. The monobore completions have also been designed to accommodate high rate and high volume HCI acid stimulations that are performed during initial completions, and that may be needed throughout the life of the field. Qatar's North Field monobore completions have been designed to accommodate all of the above well conditions under all expected wellbore load cases, while providing years of trouble free service. This paper describes the wellbore and equipment design concepts utilized, the equipment innovations made, the equipment installation philosophy and results, and the equipment performance realized to date for the monobore completions in Qatar's offshore North Field.
5 citations
1 citations