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Biomedical subjects

K M Reynolds

Publications and source records attributed to K M Reynolds.

15 recordsLinked to original sources
PubMed2001

A pear-derived kairomone with pheromonal potency that attracts male and female codling moth, Cydia pomonella (L.).

Ethyl (2E, 4Z)-2,4-decadienoate, a pear-derived volatile, is a species-specific, durable, and highly potent attractant to the codling moth (CM), Cydia pomonella (L.), a serious pest of walnuts, apples, and pears worldwide. This kairomone attracts both CM males and virgin and mated females. It is highly attractive to CM in both walnut and apple orchard contexts, but has shown limited effectiveness in a pear orchard context. Rubber septa lures loaded with ethyl (2E, 4Z)-2,4-decadienoate remained attractive for several months under field conditions. At the same low microgram load rates on septa, the combined gender capture of CM in kairomone-baited traps was similar to the capture rate of males in traps baited with codlemone, the major sex pheromone component. The particular attribute of attracting CM females renders this kairomone a novel tool for monitoring population flight and mating-ovipositional status, and potentially a major new weapon for directly controlling CM populations.

Animals↗
PubMed1998

The Diatek Arkive "Organizer" patient information management system: experience at a university hospital.

OBJECTIVE: To install and successfully use early commercial automatic anesthesia recordkeepers, the Diatek Arkive "Organizer" units, in the operating rooms at a major university medical center. METHODS: Because of the history of previous academic attempts at automatic anesthesia recordkeeping, the units were installed on a "surprise" basis, with hardly any discussion of the devices beforehand. RESULTS: The devices themselves had a number of minor difficulties at the start, most of which were promptly corrected. Eventually the units were in use in all non-cardiac general operating rooms. At one point, usage reached over 90% of possible cases. Continued opposition to the device on the part of certain individuals, coupled with the obsolescence of the present devices in light of new technology, led to the eventual abandonment of the system and removal of the devices from service. DISCUSSION: Total resistance to the new devices on the part of a few vocal faculty members was a major factor in the ultimate downfall of the system. The method of introduction, and especially the lack of involvement of faculty, residents, surgeons, operating room personnel, hospital computer personnel, and the hospital administration in the installation also played a role in the failure of the system. Lack of a workable training mechanism for new residents prevented that user group from rapidly gaining comfort with the systems.

Anesthesia Department, Hospital↗
PubMed1996

Pre-operative oximetry and capnometry: potential respiratory screening tools.

The growing number of patients admitted for outpatient surgery or for same-day admission makes it difficult to obtain thorough pulmonary evaluation. We wanted to evaluate the applicability of pre-operative pulse oximetry and capnography as possible pulmonary screening tools. In this preliminary study, 200 unselected, unmedicated adult patients who were being admitted for surgery were connected to a dual parameter patient monitor (Capnomac Ultima, Datex). A standard adult clip-on finger probe was used for pulse oximetric oxygen saturation. Sidestream capnometry documented the end-tidal carbon dioxide and the capnogram which was recorded for further analysis. In these unmedicated patients, the oxygen saturation ranged from 91 to 99% and was found to be 94% or less in five percent (N = 10) of the cases. The end-tidal carbon dioxide ranged from 21 to 48 mmHg. In five percent of the cases (N = 10) it was found to be 45 mmHg or higher, reflecting elevated arterial CO2. When the shape of the capnogram was rated, it was found normal in 54% of the cases. Slow rising capnogram, indicating mild (N = 84) or moderate (N = 8) airway obstruction was detected in 42% or 4% of the cases respectively. Since pulse oximeter and end-tidal carbon dioxide values are often not measured until after sedation or after induction of anesthesia, patients with pre-operative abnormalities might escape pre-operative detection. In unmedicated patients, routine pre-operative or pre-admission determination of oxygen saturation, end-tidal carbon dioxide and the capnogram may be a valuable screening tool.

Adult↗
PubMed1995

An expert system to teach troubleshooting of common problems associated with the automated anesthesia recordkeeper.

Automated anesthesia recordkeepers have been used to monitor patients during surgery in up to 90% of cases at The Ohio State University. The record-keeping devices are complex and can be difficult to troubleshoot. The 1st-CLASS Fusion Program, an expert system "shell-program," has been programmed to allow the resident or nurse anesthetist to solve the two most common types of problems associated with the recordkeeper: printer problems and patient monitor problems. Use of this program allows the resident or nurse anesthetist to troubleshoot the recordkeeper quickly and accurately and promotes in the user a sense of competence and control over the technology.

Anesthesia↗
PubMed1995

Pyrimethamine analysis by enzyme inhibition and HPLC assays.

Pyrimethamine is an antiparasitic agent currently used for therapy of central nervous system toxoplasmosis, a disease seen with increasing frequency in association with the AIDS epidemic. Monitoring of pyrimethamine levels may be particularly important because patients may be treated with high doses of the drug for extended periods of time. The authors have developed and validated both a new enzyme inhibition assay that can be run on an automated analyzer and an improved high performance liquid chromatography (HPLC) method. The calibration range of both methods is 100 to 3,000 micrograms/L. Both demonstrate good linearity, specificity, and precision, and correlate well with one another (r = 0.99). The CVs of the enzyme inhibition assay were < or = 8.6% and those of the HPLC method were < or = 5.4%. No interference was noted for a variety of drugs likely to be used concomitantly with or in lieu of pyrimethamine with the exception of a minor interference from trimethoprim in the enzyme inhibition assay. The major advantage of the enzyme inhibition assay is its ease of automation. The major advantages of the HPLC assay are its precision and relative simplicity. These methods should facilitate therapeutic monitoring of pyrimethamine.

Calibration↗
PubMed1993

Screening for early familial ovarian cancer with transvaginal ultrasonography and colour blood flow imaging.

OBJECTIVE: To assess the value of transvaginal ultrasonography with colour blood flow imaging in detecting early ovarian cancer in women with a family history of the disease. DESIGN: Study of self referred symptomless women with a close relative who had developed the disease. Each woman was screened to detect persistent lesions and defined changes in ovarian volume. Morphological score and pulsatility index were recorded. SETTING: Ovarian screening clinic. SUBJECTS: 1601 self referred women. INTERVENTIONS: Women with a positive screening result were recommended to have further investigations. MAIN OUTCOME MEASURES: Findings at surgery and histology of abnormal ovaries. Morphological score > or = 5 and pulsatility index < 1.0 at last scan. RESULTS: Women were aged 17 to 79 (mean 47) years; 959 (60%) were premenopausal, 469 (29%) were naturally postmenopausal, and 173 (11%) had had a hysterectomy. 157 women had a pedigree suggestive of the site specific ovarian cancer syndrome and 288 of multiple site cancers. 61 women had a positive screening result (3.8%, 95% confidence interval 2.9 to 4.9%), six of whom had primary ovarian cancer detected at surgery (five stage Ia, one stage III). Use of a high morphological score or a low pulsatility index increased the odds of finding ovarian cancer from 1:9 to about 2:5 (1:1 in the highest risk groups). Five interval cancers were reported (three ovarian and two peritoneal). Eight of the 11 cancers developed in women with pedigrees suggestive of inherited cancer. CONCLUSIONS: Transvaginal ultrasonography with colour flow imaging can effectively detect early ovarian cancer in women with a family history of the disease. The screening interval should be less than two years.

Adolescent↗
PubMed1993

Transvaginal color blood flow imaging of the periovulatory follicle.

OBJECTIVE: To assess intrafollicular blood flow in relation to ovarian morphology and function during the periovulatory period. DESIGN: A prospective, longitudinal study of random, natural ovarian cycles. SETTING: The Ovarian Screening Clinic and Endocrine Laboratory of the Department of Obstetrics and Gynaecology, King's College Hospital, London, United Kingdom. PATIENTS: Women with apparently normal ovarian function awaiting treatment for infertility by IVF-ET during subsequent natural cycles. INTERVENTIONS: All women were examined by transvaginal ultrasonography with color flow imaging and had a sample of peripheral venous blood taken at each scan for hormone analysis. MAIN OUTCOME MEASURES: The minimum pulsatility index (PI) and maximum peak systolic velocity from vessels within the dominant follicle; the maximum follicular diameters (and hence volume); serum FSH, E2, LH, and P. RESULTS: The dominant follicle ruptured in 10 of 11 women. The median interval between the two scans that delineated the time of follicular rupture was 9.5 hours (range, 0.0 to 24.5 hours). These cycles appeared to be morphologically and endocrinologically normal. There was an apparent increase in intrafollicular blood flow over the periovulatory period with an insignificant trend toward lower values for the mean PI and a significant increase in the peak systolic velocity. These changes appeared to follow the rise in circulating LH. CONCLUSION: Indexes of blood flow at a given site within the leading follicle can be monitored by transvaginal ultrasonography with color Doppler imaging over the periovulatory period. The increase in the peak systolic velocity and the relatively constant PI suggest a marked increase in blood flow at this time during the ovarian cycle.

Adult↗
PubMed1991

The effects of cadmium on ethanol self-administration using a sucrose-fading procedure.

Rats were exposed for 70 days to either a diet containing 100 ppm cadmium (Group Cadmium) or a control diet with no additives (Group Control). Subsequently, all animals were trained to lever press for a 20% sucrose solution. Across several phases, sucrose was faded out as the reinforcer and gradually replaced with a 10% ethanol solution. A subsequent operant choice (concurrent) test, during which pressing one lever resulted in a dipper presentation of ethanol and the other lever provided water, was followed by a single-lever test where sucrose was reinstated as the reinforcer. The results showed that although cadmium-treated rats lever pressed more than controls during the early phases of the sucrose-fading procedure, animals exposed to cadmium lever pressed at lower rats than controls for ethanol during the concurrent test. There were no group differences on the final sucrose test. The possibility that cadmium may alter sensitivity to ethanol is discussed.

Animals↗
PubMed1979

Skin and gonadal dose reduction during hip radiography of the bull.

Radiology is being used to an increasing extent in the clinical diagnosis of hip lameness in bulls. Consequent gonadal doses may have important implications in later breeding programmes. Skin and gonadal doses were recorded during hip radiography of 18 bulls. An additional 0.13 mm copper filtration reduced skin dose by more than one third, but had no effect on gonadal dose. The average radiation dose to the gonads was approximately halved by completely surrounding the scrotum with lead sheeting 0.95 mm in thickness.

Animals↗
PubMed1977

Gonadal dosage during hip dysplasia radiography in the dog.

Thermoluminescent dosemeters were used to estimate gonadal dosage during hip dysplasia radiography of labrador retriever dogs. The mean radiation dose to the unshielded testes was 100 millirad (mrad) and the estimated dose to the shielded testes was 9 mrad. It was considered unnecessary to shield the ovaries.

Animals↗