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Biomedical subjects

R Andrews

Publications and source records attributed to R Andrews.

At least 109 records · Page 6Linked to original sources
PubMed1981

Monitoring heparin anticoagulation and its neutralization.

Heparin anticoagulation and its neutralization were monitored by three different techniques: a manual protamine titration, an automated activated coagulation time, and an automated protamine titration. All three techniques provided satisfactory information. The decision of which to use must be based on other considerations such as available manpower and cost of equipment. The effect of using the automated protamine titration test on heparin and protamine requirements, and on blood loss measured intraoperatively after bypass and in overnight chest bottle drainage in two groups of comparable patients undergoing coronary artery bypass operation was studied. The heparin requirements were similar (24,420 +/- 584 units, control group; 23,550 +/- 849 units, treatment group), but the protamine requirements were markedly different (429 +/- 14.7 mg, control; 258 +/- 10.4 mg, treatment; p < 0.05). There was no statistical difference in intraoperative blood loss or overnight chest bottle drainage.

Autoanalysis↗
PubMed1980

Behavior of Down syndrome infants in a strange situation.

The responses of 18 Down syndrome infants in a modified "strange" situation were recorded. The results indicated that these infants were aware of the exits and entrances of both mother and stranger. They cried and showed non-crying distress significantly more when their mothers were absent and showed awareness of the focal point of the room by looking at the door more in appropriate experimental episodes. They also showed increased looking at mother and physical contact on reunion with her. Concluded that the behavior Down syndrome infants is qualitatively similar to nonretarded children and that they indicate their levels of social awareness in these experimental situations.

Anxiety, Separation↗
PubMed1979

Vocalization and looking behaviour of Down's syndrome infants.

The effect of contingent and non-contingent vocal stimulation on vocalization and looking behaviour was investigated for 10 Down's syndrome infants. There were two experimental sessions consisting of four stages, namely 1 min base-line, 1 min experimental condition, a further 1 min base-line and a final 2 min experimental condition. Maternal vocal stimulation was contingent upon infant vocalization for the experimental conditions of one session and was presented every 10 s independent of infant vocalization for the experimental conditions of the other session. Neither condition increased infant vocalization but there was a significant decrease in looking at mother during the base-line stages which followed maternal vocalization (F = 5.07, d.f. = 4, 28, P less than 0.01). It is suggested that looking behaviour may be an important indication of competence in pre-linguistic social communication for developmentally delayed infants.

Child Behavior↗
PubMed1979

Gastro-intestinal helminths in white-tailed deer (Odocoileus virginianus) of Illinois.

Two deer populations, one in northern Illinois the other in southern Illinois, were examined by necropsy (n = 44 and 40 respectively) for helminth parasites of the gastro-intestinal tract and abdominal cavity. Both herds were parasitized by Apteragia odocoilei, Haemonchus contortus, Gongylonema pulchrum, Setaria yehi, Trichuris ovis, and Moniezia benedeni. Nematodirus sp. was found only in deer of northern Illinois. Ostertagia mossi, Capillaria sp., Cooperia sp., and Oesophagostomum sp. were found only in deer of southern Illinois.

Animals↗
PubMed1978

Effects of ultrasound on the corneal endothelium: I. The acute lesion.

The ultrasonic radiation utilised in phacoemulsification procedures for the removal of cataractous lenses results in the widespread production of discrete lesions in the corneal endothelium. The morphology of this induced damage has been examined in rabbit and man using both scanning and transmission electron microscopy. The illustrated results are related to both the duration of the ultrasonic exposure and to the mechanisms of damage.

Animals↗
PubMed1978

Effects of ultrasound on the corneal endothelium: II. The endothelial repair process.

The responses of corneal endothelium to a 2-minute exposure of ultrasound from a clinical phacoemulsification device have been studied by specular microscopy and both scanning and transmission electron microscope. Healing of lesions occurred in two ways, and these were related to lesion size. Small lesions healed by a process of rosette formation, and large lesions were repaired by a process of endothelial dedifferentiation and migration. All damaged areas were re-covered with endothelial cells within 24 hours of exposure, and at this time corneal thickness had returned to control levels. The implications are discussed in relation to the phacoemulsification procedure.

Animals↗
PubMed1977

Effect of lysolecithin on gastric mucosal structure and potential difference.

The effect of lysolecithin (100 mg%) on the guinea-pig gastric mucosa was studied by instilling a solution for 30 minutes, preceded and followed by 100 MN HCl into 10 total gastric pouches. Ten control animals had HCl throughout. Lysolecithin produced a significant change in transmucosal potential difference, macroscopic erosions, and mucosal damage on histology and electron scanning microscopy. None of these changes was seen in the control animals. This is further evidence that the reflux of lysolecithin from the duodenum is an important factor in causing active gastritis and gastric erosions.

Animals↗
PubMedDate not supplied

The case for national health data standards.

The Health Insurance Portability and Accountability Act of 1996 (HIPAA) contains groundbreaking provisions to encourage the development of a national health information system through the establishment of standards. This paper compares statewide inpatient data systems to one standard--the Uniform Bill (UB)--to understand how standards have been used and how they can be improved. We recommend changes to the UB, note the need for better compliance, and suggest new standards for common, derived elements.

Computer Communication Networks↗