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Biomedical subjects

J Kendrick

Publications and source records attributed to J Kendrick.

17 recordsLinked to original sources
PubMed1998

Standardising health outcome measurements in general practice.

BACKGROUND: Outcome measures are gaining importance especially in areas such as divisions of general practice. The plethora of outcome measurements and the rhetoric surrounding this may make it difficult for doctors to decide the place of such measures in daily practice. An understanding of outcomes and their indicators is emerging as an essential requirement for good practice. OBJECTIVE: The aim of this paper is to propose a practical framework for describing health outcome measurements that may be applied to general practice. METHODS: This paper outlines the key features of outcomes measurements and proposes a model for understanding health outcome indicators using a set of indicators relevant to clinical practice. RESULTS: Pertinent to developing outcome terminology for use with patients in general practice are the four key features: a clear description of the indicator utility in practice comparability between practices endurance over time. CONCLUSION: To have reliability and validity and be able to deliver outcomes with practical and clinical significance, we need to be sure that the instruments we use are precisely defined. It is also important that the meaning is universally understood by all who might want to use the instruments. The product should also have cultural applicability beyond English. In clinical practice, the definition of the instrument aims not only to give the general practitioner a clear understanding of what is being measured but how it is used and the implications for its future use.

Family Practice↗
PubMed1996

Locums. A guide on how to use them.

This article outlines a range of issues that should be resolved with each locum before placement in a general practice. It also provides some measures by which the service provided to the practice can be evaluated. Through a series of checklists, general practitioners can prepare their practice for locums and assess the impact of the service.

Australia↗
PubMed1991

Calculation and display of electrostatic potentials.

A general methodology is developed for incorporating accurate electrostatic information from ab initio molecular orbital calculations into molecular mechanics calculations. Examples are given of the method applied to simple aromatic organic molecules. A program has been developed for displaying the results of the ab initio calculations on a Silicon Graphics workstation. The technique developed here provides an alternative method for including electrostatic interactions in molecular mechanics calculations and is compared with other methods for determining atomic charges.

Computer Graphics↗
PubMed1986

A general approach to the optimization of the conformation of ring molecules with an application to valinomycin.

A general and efficient methodology is presented which allows molecules containing one or many rings of any size to be manipulated within energy minimization procedures. Variables describing the conformation of the molecules concerned are limited to dihedral and ring valence angles and the ring closure conditions are treated as equality constraints. An application is made to the ion transporter valinomycin and its complexes with K+ and Na+ which illustrates the possibilities of the approach and leads to results which allow a better understanding of the conformational mechanics of this important ionophore.

Mathematics↗
PubMed1981

Arterial embolectomy in the leg. Results in a referral hospital.

The clinical characteristics and course of 90 patients in whom 121 arterial emboli occurred from 1968 to 1978 were reviewed. The factor that correlated most significantly with a favorable outcome was the interval from onset of symptoms until arterial embolectomy was performed. The results of embolectomy were excellent in the patients operated on within 6 hours of symptoms (amputation rate 4 percent, mortality rate 15 percent), but less favorable in the patients operated on within 6 to 12 hours of onset of symptoms (amputation rate 27 percent, mortality 40 percent). Mortality (48 percent) and amputation (52 percent) rates in the patients operated on 12 to 48 hours after onset of symptoms were excessive. It is recommended that immediate embolectomy be performed in all potentially viable extremities in patients who present within 12 hours of symptoms, but that after 12 hours only those limbs with obvious viability (not paralyzed or anesthetic) should be operated on. Alternatives for the remainder are high dose intravenous heparinization or expedient amputation. In patients who present greater than 60 hours after the onset of symptoms, embolectomy can be performed with low morbidity and mortality.

Amputation, Surgical↗
PubMed1976

Epithelial lesions induced by N-nitrosoheptamethyleneimine in host and transplanted rat tracheas.

N-Nitrosoheptamethyleneimine (NHMI) was given by gastric intubation, at a dosage of 10 mg/kg body weight twice weekly for 5-20 weeks, to F344 rats bearing subcutaneous tracheal transplants. Groups of 5 rats were killed at 5, 10, 15, and 20 weeks, and 1 group was killed at week 33 of the experiment (13 weeks after the last NHMI dose). Sequential changes in host tracheas consisted of hyperplasia with complete loss of mucociliary epithelium, squamous metaplasia, intense mononuclear infiltration, reestablishment of mucocillary epithelium (during the course of NHMI administration) except for focal areas of hyperkeratotic squamous metaplasia or marked dystrophic changes, and finally, papillomas, polyps, and invasive squamous cell carcinomas. Lesions in tracheal transplants consisted mostly of atrophic and dystrophic changes, with only a few small foci of squamous metaplasia and no neoplastic changes.

Animals↗
PubMedDate not supplied

Respiratory tract deposition of smoke particles using a nasal bypass device.

In order to avoid nasal absorption, an intralaryngeal cannula was tested as a device for bypassing the nose in delivering smoke into the lungs of hamsters. The intralaryngeal cannula increased lung deposition of radiolabeled smoke particles twofold to threefold over that in nose-breathing controls. Stabilization of respiration (absence of avoidance reaction), rather than prevention of nasal absorption of smoke, was demonstrated to be the cannula's major mechanism of action. Although suitable for acute exposures, the device is of limited use for chronic exposures that require daily insertion of the cannula during an extended period of time.

Animals↗
PubMedDate not supplied

A tobacco smoke inhalation exposure device for rodents.

A system which utilizes a piston pump to generate cigarette smoke under standard conditions, and expose rodents to the inhalation of diluted smoke for controlled periods of time is described. Variations of the basic system have been employed to exposure groups of ten to twenty hamsters or rats, and should allow exposures of up to forty mice. The system has been in use for approximately 24 months in routine chronic exposures of rats. Data are presented to define the operating characteristics and typical dosimetry. Animal containment peculiar to this apparatus is described.

Animals↗