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Biomedical subjects

B Lindgren

Publications and source records attributed to B Lindgren.

87 records · Page 5Linked to original sources
PubMed1979

Changes in the costs of elective cholecystectomies, 1955-1965-1975.

The costs for elective cholecystectomies were measured 1955, 1965 and 1975. The average length of stay decreased by 25% between 1955 and 1965 and with the same amount between 1965 and 1975. In spite of these marked reductions in the average length of stay there was only a significant decrease in costs between 1955 and 1965 but not between 1965 and 1975.

Cholecystectomy↗
PubMedDate not supplied

Ultrasonographic screening for abdominal aortic aneurysm: analysis of surgical decisions for cost-effectiveness.

A mathematic model is created to determine the economic cost per year of anticipated prolongation of life that would result from a program of abdominal ultrasonographic (US) screening for abdominal aortic aneurysm. The protocol involves US screening at age 60, 67, and 74 years with additional annual follow-up US and examination if an aneurysm of less than 40 mm is detected. Larger aneurysms are assumed to be sent for early elective resection. The benefits and risks for a subset of men with symptoms of intermittent claudication (IC) as an additional risk factor of atherosclerosis is calculated for comparison. Many of the factors on which these calculated costs and benefits are based are approximations and inferences. These include operative mortality for elective and emergent cases, charges for each such condition, cost of US, and anticipated survival following successful aneurysmectomy both with and without concomitant IC. Sensitivity analysis is performed to show how variations in the major parameters alter the outcome of the calculated cost per year of anticipated extension of life.

Aged↗
PubMedDate not supplied

Monitoring progress after lung transplantation from home-patient adherence.

A paperless electronic spirometer/diary instrument has been employed in a home monitoring programme for lung and heart-lung transplant patients at the University of Minnesota. The monitoring programme is part of a long term study to develop a system which will detect the earliest signs of developing rejection or infection in the transplanted organs. It is based on patient daily self-measurements of standard spirometry, vital signs, and symptoms recorded at home and transmitted weekly to the study data center over the telephone using a modern built into the instrument. This report summarizes adherence behaviour for 41 subjects enrolled in the study over a 12 month period. The number of subjects from whom home data has been received each week was used to measure adherence at the subject level. The number of records received each week measured adherence at the daily recording level. A data record consists of a daily set of spirometry, vital signs, and symptom values from a given subject. Approximately 82% of subjects transmitted records each week, over the 52 week review period. There was an average of 4.5 records received each week from each subject. Transmitted records had missing vital sign or symptom items in less than 2% of cases, spirometry data was always present. This evaluation showed than lung transplant recipients are willing and able to use a home-monitoring instrument, and that basic spirometry, data entry, and data transmission can be performed satisfactorily.

Adolescent↗
PubMedDate not supplied

Routine operative cholangiography or pre-operative infusion cholangiography at elective cholecystectomy--a cost-effectiveness analysis.

Previous data from our surgical department suggests that routine operative cholangiography (strategy I) can be replaced by a combination of pre-operative intravenous infusion cholangiography and selective operative cholangiography (strategy II). The general clinical results with the two strategies were similar during a follow-up period of one year. The present study compares the costs for the two strategies through cost-effectiveness analysis. The calculated average total hospital costs with the two strategies did not differ significantly. The costs obtained were SEK 9,150 for strategy I and SEK 9,430 for strategy II. These findings support the opinion that strategy II is approximately as cost-effective as strategy I in the management of patients subjected to cholecystectomy.

Adolescent↗
PubMedDate not supplied

Liquid chromatographic determination of bromide ion in cereals, fruit, vegetables, and blood with a silver electrode in an electrochemical detector system.

A method is presented for rapid determination of bromide ion in commodities and blood by paired-ion liquid chromatography with electrochemical detection. The method involves extraction of samples with water and filtration. Blood is passed through a Sep-Pak C18 minicolumn. Recoveries are usually close to 100%, with satisfactory precision. The detection limit is 1 mg/kg. The method needs little labor and uses no noxious solvents or reagents.

Bromides↗
PubMedDate not supplied

Reliability and validity of spirometry measurements in a paperless home monitoring diary program for lung transplantation.

OBJECTIVE: To demonstrate that home spirometry measurements are reliable and valid and can be used as part of a home measurement monitoring system by lung transplant recipients. DESIGN: Longitudinal, observational. SETTING: University medical center. SUBJECTS: Eighteen patients who have undergone lung transplantation; age range was 24 to 63 years (mean of 49.5 years). OUTCOME MEASURES: Reliability and validity of forced expiratory volume at 1 second (FEV1) and forced vital capacity (FVC). INTERVENTION: Recording of spirometry, vital signs, and symptom measures at home each day by use of a paperless electronic diary/spirometer instrument. RESULTS: Day-to-day variability as measured by the standard deviation ranged from 0.013 L to 0.202 L for FVC and 0.015 L to 0.117 L for FEV1. The correlation between the two best forced expiratory maneuvers on any given day was 0.98 for both FVC and FEV1, with percent differences between the measurements of 2% for FVC and 3% for FEV1. The correlation between measurements performed in the pulmonary function laboratory and measurements done by the patient at home on the same day was 0.94 for FVC and 0.99 for FEV1. CONCLUSIONS: This evaluation demonstrated that home measurements are both reliable (i.e., repeatable) and valid when compared with the "gold standard" of the pulmonary function laboratory. The home monitoring program has been well accepted by patients, is easy to use, and provides data comparable to that collected during clinic visits.

Adult↗