Disposable blood handling cassette device for measuring haemostasis
First Claim
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1. A device for measuring haemostasis properties of a blood sample comprising:
- a blood sample reservoir for receiving a blood sample through an inlet, and for receiving a displacing material forcing said blood sample through an outlet;
a blood sample tube connected to said outlet and connected to a collection chamber for receiving displaced blood; and
,a punching station located along said blood sample tube for punching a hole in said tube, whereby blood exits said hole, simulating bleeding, said punching station including a drain tube having a top end centered with respect to said hole collecting said exiting blood, said drain tube being tapered from said top end to a narrower discharge end connected to a compartment of said collection chamber, said narrow end permitting detection of blood droplets formed from said simulated bleeding.
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Abstract
A disposable blood holding cassette for haemostatic measurements. A single unit is provided having a blood sample container with three separate pressurized blood sample reservoirs. A waste blood collection reservoir is connected to the blood sample container, and connected thereto via first, second and third blood sample tubes. A punching station is provided to accurately punch first and second of the blood sample tubes, simulating haemostasis function in vitro. Measurements may be made of the haemostatic and thrombolytic function of recently sampled blood. The entire device is disposable, isolating any contaminated blood from clinical personnel.
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Citations
18 Claims
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1. A device for measuring haemostasis properties of a blood sample comprising:
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a blood sample reservoir for receiving a blood sample through an inlet, and for receiving a displacing material forcing said blood sample through an outlet; a blood sample tube connected to said outlet and connected to a collection chamber for receiving displaced blood; and
,a punching station located along said blood sample tube for punching a hole in said tube, whereby blood exits said hole, simulating bleeding, said punching station including a drain tube having a top end centered with respect to said hole collecting said exiting blood, said drain tube being tapered from said top end to a narrower discharge end connected to a compartment of said collection chamber, said narrow end permitting detection of blood droplets formed from said simulated bleeding. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A disposable blood cassette for a haemostasis measuring device comprising:
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a plurality of blood sample containers supported in a saline solution jacket, said blood sample containers having a sealable inlet and vents permitting individual blood samples to be introduced, and each having a paraffin oil supply line for forcing blood through a respective outlet; a blood waste receptacle fixed to said blood sample containers having a plurality of chambers connected to said outlets via individual blood sample tubes; and
,a blood sample tube punching station supported on an exterior of said surface of said blood waste receptacle including at least one tapered drain tube having one end traversed by one of said blood sample tubes, and the remaining end connected to a compartment in said waste receptacle, said punching station including a punching means for punching a hole in said blood sample tube, whereby blood droplets form in said drain tube providing a detectable indication of bleeding. - View Dependent Claims (8, 9, 10, 11)
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12. A disposable blood holding cassette for a haemostasis measuring device comprising:
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a blood sample reservoir having three separate pressurized blood sample containers, said blood sample reservoirs being surrounded by a liquid-tight jacket which receives a recirculated heating media; a waste blood collection reservoir having three separate pressurized chambers supported on a base, and a separate compartment in said base having first and second openings for storing waste blood; first, second and third blood sample tubes connecting each of said blood sample containers with a respective pressurized chamber, permitting flow of blood from said blood sample reservoirs to each pressurized chamber; and
,a punching station comprising first and second drain tubes having an open end traversed by said first and second sample tubes, and having a second end connected to said first and second openings of said compartment, and first and second punching plungers which accurately locate first and second punching needles with respect to said traversing portions of said sample tubes, and subsequently puncture said traversing portions with said needles simulating bleeding, droplets of blood flowing towards said second ends of said drain tubes into said base. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification