Capillary blood drawing device
First Claim
1. A capillary blood drawing device comprising:
- means by which to puncture the tissue of a patient so as to draw blood therefrom;
flexible blood collecting means adapted to be in either a compressed or expanded condition, said blood collecting means being in a compressed condition while the patient'"'"'s tissue is being punctured, said blood collecting means being in an expanded condition after the tissue is punctured so as to be infused with a blood sample by means of suction, and said blood collecting means being in a compressed condition after being infused with said blood sample so as to expulse the sample therefrom for medical examination and diagnostic purposes; and
means engaging said blood collecting means and movable therewith for successively compressing and expanding said blood collecting means to cause said blood collecting means to be infused with or expulse the patient'"'"'s blood sample.
1 Assignment
0 Petitions
Accused Products
Abstract
A compact, efficient and disposable capillary blood drawing device by which a patient'"'"'s tissue can be punctured and a blood sample collected by the same reliable device. The blood drawing device includes the integral connection of a solid core needle and a spring in which potential energy is initially stored. A release of the potential energy from the spring correspondingly causes the needle to be driven into contact with the patient'"'"'s tissue to make a puncture therein. When the spring assumes an at rest position, the needle will be safely withdrawn in and shielded by the blood drawing device to avoid an accidental needle stick and the possible spread of disease. The blood drawing device also includes a flexible bladder in which blood from the puncture can be collected, under suction, and selectively expulsed, under compression, for medical examination and diagnostic purposes.
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Citations
20 Claims
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1. A capillary blood drawing device comprising:
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means by which to puncture the tissue of a patient so as to draw blood therefrom; flexible blood collecting means adapted to be in either a compressed or expanded condition, said blood collecting means being in a compressed condition while the patient'"'"'s tissue is being punctured, said blood collecting means being in an expanded condition after the tissue is punctured so as to be infused with a blood sample by means of suction, and said blood collecting means being in a compressed condition after being infused with said blood sample so as to expulse the sample therefrom for medical examination and diagnostic purposes; and means engaging said blood collecting means and movable therewith for successively compressing and expanding said blood collecting means to cause said blood collecting means to be infused with or expulse the patient'"'"'s blood sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A capillary blood drawing device to puncture a patient'"'"'s tissue and collect a sample of the blood drawn from the puncture, said blood collector comprising:
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needle means movable towards the patient'"'"'s tissue to make the puncture therein; spring means to control the movement of said needle means; flexible bladder means in which to collect the patient'"'"'s blood by means of suction; and means by which to successively expand and compress said bladder to cause said bladder to be infused with or expulse the patient'"'"'s blood. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A capillary blood drawing device comprising:
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needle means by which to puncture the tissue of a patient so as to draw blood therefrom, said needle means being movable between shielded and unshielded locations; locking means by which to retain said needle means at said shielded location so as to avoid contact with the patient'"'"'s tissue; inflatable blood collecting means adapted to be in either a compressed or expanded condition, said blood collecting means being in the compressed condition while the patient'"'"'s tissue is being punctured, and said blood collecting means being in the expanded condition after the tissue is punctured so as to be infused with a blood sample by means of suction; means for compressing and expanding said blood collecting means to cause said blood collecting means to be evacuated or infused with the patient'"'"'s blood; and needle releasing means movable into engagement with said locking means when said blood collecting means is compressed so as to release said needle means from said shielded location for movement to said unshielded location at which to puncture the patient'"'"'s tissue. - View Dependent Claims (17, 18, 19, 20)
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Specification