Chairs and seats – Movable bottom – Tiltable
Patent
1989-06-01
1990-07-17
Aschenbrenner, Peter A.
Chairs and seats
Movable bottom
Tiltable
297311, A47C 102
Patent
active
049417096
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a chair for placing a patient in desired positions for e.g. radiological examination, especially of the lungs and pleurae, comprising a preferably wheel-mounted underframe carrying the seat and back-rest assembly of the chair by means of two parallel, rigidly interconnected circular arc sections which are longitudinally displaceably mounted in holders connected to the underframe and can be locked in the adjusted position.
All too few physicians are aware that the examination routines during pneumonography of old, seriously ill, newly operated etc. patients are time-consuming and difficult both for the patient and for the staff. About 40% of pneumonography patients in a general hospital are over 70 years of age. A patient who cannot stand up by himself--as is usually is the case--is admitted sitting in a wheel chair or bed and is first lifted over to the conventional pneumonography frame to sit on a stool for standard images, i.e. frontal and lateral images. In many cases the patient must then wait until the radiologist has approved the images, and if pleural effusion is suspected, the radiologist often requires special images to supplement the images already taken. Then the patient is transferred, frequently by being lifted, to a different place of examination, perhaps in another room, for examination in the lateral position on an examination table. The disposition is often primitive and varies from one hospital to another. Normally, the patient is positioned on two cushions, one underneath the hip and another cushion underneath the shoulder, thereby to project from the examination table the lowest part of the chest where the fluid collects; in other words, the radiation is horizontal. First one side is examined, and then the patient must be lifted and turned over on his other side and the cushions repositioned. After this laborious examination, the patient is left lying on the table until the examination has been approved by the radiologist. This means that the laboratory in question is blocked so that other patient who are in turn must wait. The lateral positioning procedure is so laborious that those most seriously ill, about 1/3 of the patients, cannot at all be examined in the lateral position. This unfortunate state of things affects about 1/4 of all pneumonography patients in the hospital, which must be regarded as highly unsatisfactory.
However, I have now developed a quick and more convenient technique for examining pleural effusion. The technique was published in the American Periodical Radiology in January, 1984, Vol. 150, No. 1, pages 245 -249. The new technique can cope with all categories of patients. The patient rests comfortably in the semi-supine position in a chair, slightly inclined to the right, and in this manner both pleurae are simultaneously visualised upon radiological examination in the conventional lung frame while the standard images are being obtained. The entire procedure now is quick and easy, and the old lateral position is seldom required. However, it is somewhat irrational to have, for example, one chair for pneunomography in the sitting position, and another chair for the semi-supine position, and a third arrangement for the lateral position, and to repeatedly lift ill and heavy patients from one place to another. The above-mentioned example of pleural effusion is one aspect and the one which is most common. However, there are also other aspects in which different positions of the body may be involved in pneumonography, and also outside the field of radiologogy, there is a need for positioning patients in different positions, for example for draining pleural fluid and for ultrasonic pleural examination, transillumination checks, and other medical aspects concerning the lungs.
The present invention has several objects which are more or less related to one another, viz. laboratory; pneumonography by means of the new semi-supine projection; which may be needed in pneumonography, but which are not mentioned here;
To sum up, it should be possib
REFERENCES:
patent: 2770286 (1956-11-01), Weller
patent: 3999799 (1976-12-01), Daswick
patent: 4173372 (1979-04-01), Norris
patent: 4383714 (1983-05-01), Ishida
patent: 4709960 (1987-12-01), Launes
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