Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1989-03-08
1991-11-19
Rosenbaum, C. Fred
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604 27, 128762, A61M 100
Patent
active
050662830
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a device for withdrawing body fluids such as blood urine, and tissue fluid, which includes a withdrawal unit and a suction unit.
DESCRIPTION OF THE PRIOR ART
For withdrawing body fluids, such as blood, tissue fluid, fluid from body cavities, or urine, various medical devices are known, the most common being piston-fitted syringes, pipettes, and cannulas and catheters remaining at the site of withdrawal.
In many instances the parameter or parameters of the body fluid relevant for the particular test must be measured or monitored for a given period of time; in view of the rapid changes that often occur in parameters, it is frequently necessary to draw and analyze a sample of the body fluid at short intervals.
In certain hormone tests, for instance, blood samples must be taken every hour, which is extremely unpleasant for both patient and doctor, especially during the night. Examples in which blood sampling is required in order to obtain diurnal variation profiles include a number of hormone disorders, such as morbus cushing with disturbances in the diurnal cortison rhythm disturbances of growth and pubescence characterized by an absence of the nocturnal peaks of growth and sex hormones, and many others.
Another important application is the pharmaceutical industry, in which blood and tissue levels of drugs or their effects must be registered over a period of 24 hours.
In some instances it is possible to take blood samples via permanent arterial or venous access paths, which will at least avoid repeated puncturing several times a day; the patient still has to put up with unpleasant manipulations, however.
SUMMARY OF THE INVENTION
It is the object of this invention to propose a device for withdrawing body fluids which will relieve the patient from unpleasant manipulations and limit the work load of the medical staff, while permitting the parameters to be analyzed as well as their variations over time to be determined with adequate precision and identified with regard to their time of withdrawal.
According to the invention this is achieved by providing a storage system between the withdrawal unit and the suction unit, which is designed for receiving the body fluid and contains individual areas which may be separated from each other and hold the fluid fractions gathered at certain intervals, and which permit these individual fluid fractions to be clearly identified with regard to their time of withdrawal. In all tests in which an on-line analysis of the body fluid gathered is not possible for various reasons, the device described by the invention permits an analysis of the individual parameters of interest linked to the time of fluid removal, even at the end of an extended sampling process. A suitable withdrawal device is either a needle inserted in the blood stream, or a catheter, or a cannula in the catheter or as a branch-off--for instance, if urine is to be sampled. Suitable suction devices are all pumps generating a constant negative pressure, such as a roll diaphragm pump or other devices, for example vacuum connections.
A first variant of the invention may provide that the storage system be configured as a flexible tube connecting the withdrawal unit and the suction unit, and that a control unit be located at the inlet end of the tube in order to separate the individual fluid fractions, via which control unit a gaseous medium separating the individual fluid fractions can be introduced into the tube at given time intervals. This control unit may be configured as a valve connecting the storage system to the outside air after given periods of time, such that an air bubble can be sucked into the tube of the storage system, thus separating the individual fluid fractions.
Another variant of the invention provides that the withdrawal unit be connected to a distributor, and that parallel branch lines from this distributor be provided for the individual separable areas of the storage system, a control unit connecting these branch lines to the withdrawal u
REFERENCES:
patent: 3429313 (1969-02-01), Romonelli
patent: 3616789 (1971-11-01), Grabhorn
patent: 3674011 (1972-07-01), Michel et al.
patent: 3765402 (1973-10-01), Grabhorn
patent: 4077395 (1978-03-01), Woolner
patent: 4705500 (1987-11-01), Reimels et al.
AVL AG
Maglione Corrine
Rosenbaum C. Fred
LandOfFree
Device for the withdrawal and storage of individual fluid fracti does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for the withdrawal and storage of individual fluid fracti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for the withdrawal and storage of individual fluid fracti will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1367518