Arterial blood extraction device

Claim 1

A device for extracting blood from a vessel utilizing a cannula or needle, comprising: (a) a container member under vacuum having a closed and an open end; (b) a valve body member having a first end affixed to said open end of said container member and a second end sized to receive the cannula, said valve body member having a first axial passageway therethrough providing fluid communication between the cannula and said container member, and a recess intersecting said first axial passageway and aligned generally transverse with respect to the axis of said first axial passageway; and (c) valve means affixed to said valve body member for regulating the flow of blood through said axial passageway, said valve means including a tubular member having first and second ends and a continuous flexible side wall therebetween defining a second axial passageway, said second axial passageway defining a portion of said first axial passageway through said valve body member and means for selectively pinching said flexible side wall upon itself transverse to said second axial passageway, said pinching means normally biased to a first position wherein said flexible side wall is pinched upon itself completely closing said second axial passageway, said pinching means comprising: (i) a lever arm affixed to said valve body member and mounted for pivotal movement between said first position wherein said axial passageway is completely closed and a second position wherein said axial passageway is fully open; (ii) a pinching member affixed to said lever arm and mounted for reciprocal movement within said recess, said pinching member having an aperture therein in which is received said tubular member, said pinching member in said first position collapsing said side wall of said tubular member upon itself, said pinching member in said second position permitting said tubular member to regain its tubular shape so that said axial passageway is fully open.

Claim 2

A device for extracting blood from a vessel utilizing a cannula or needle, comprising: (a) a container member under vacuum having a closed and an open end; (b) a valve body member having a first end affixed to said open end of said container member and a second end sized to receive the cannula, said valve body member having a first axial passageway therethrough providing fluid communication between the cannula and said container member, and a recess intersecting said first axial passageway and aligned generally transverse with respect to the axis of said first axial passageway; and (c) valve means affixed to said valve body member for regulating the flow of blood through said axial passageway, said valve means including a tubular member having first and second ends and a continuous flexible side wall therebetween defining a second axial passageway, said second axial passageway defining a portion of said first axial passageway through said valve body member and means for selectively pinching said flexible side wall upon itself transverse to said second axial passageway, said pinching means normally biased to a first position wherein said flexible side wall is pinched upon itself completely closing said second axial passageway, said pinching means comprising: (i) a lever arm affixed to said valve body member and mounted for pivotal movement between said first position wherein said axial passageway is completely closed and a second position wherein said axial passageway is fully open; (ii) a pinching member affixed to said lever arm and mounted for reciprocal movement within said recess, said pinching member having an aperture therein in which is received said tubular member, said pinching member in said first position collapsing said side wall of said tubular member upon itself, said pinching member in said second position permitting said tubular member to regain its tubular shape so that said axial passageway is fully open.

Claim 3

A device for extracting blood from a vessel utilizing a cannula or needle, comprising: (a) a container member under vacuum having a closed end with a removable closure member and an open end; (b) a valve body member having a first end affixed to said open end of said container member and a second end sized to receive the cannula, said valve body member having a first axial passageway therethrough providing fluid communication between the cannula and said container member; (c) valve means affixed to said valve body member for regulating the flow of blood through said axil passageway, said valve means adjustable to any position between fully open wherein said axial passageway is unrestricted and fully closed wherein said axial passageway is blocked, said valve means normally biased toward a first position wherein said axial passageway is blocked; (d) a free floating piston mounted for reciprocal movement within said container member, said piston disposed proximate said open end of said container member prior to beginning blood extraction; and (e) plunger means sized to engage said free floating piston for driving said piston toward said open end of said container member whereby extracted blood may be expelled from said container member.

Claim 4

A device for extracting blood from a vessel utilizing a cannula or needle, comprising: (a) a container member under vacuum having a closed end with a removable closure member and an open end; (b) a valve body member having a first end affixed to said open end of said container member and a second end sized to receive the cannula, said valve body member having a first axial passageway therethrough providing fluid communication between the cannula and said container member; (c) valve means affixed to said valve body member for regulating the flow of blood through said axil passageway, said valve means adjustable to any position between fully open wherein said axial passageway is unrestricted and fully closed wherein said axial passageway is blocked, said valve means normally biased toward a first position wherein said axial passageway is blocked; (d) a free floating piston mounted for reciprocal movement within said container member, said piston disposed proximate said open end of said container member prior to beginning blood extraction; and (e) plunger means sized to engage said free floating piston for driving said piston toward said open end of said container member whereby extracted blood may be expelled from said container member.

Claim 5

A device for extracting arterial blood utilizing a cannula or needle comprising: (a) a container member under vacuum and having a closed end and an open end; (b) a valve body member having a first end affixed to said open end of said container member and a second end sized to receive the cannula, said valve body member having a first axial passageway therethrough providing fluid communication between the cannula and said container member; (c) valve means affixed to said valve body member for regulating the flow of blood through said first axial passageway, said valve means normally biased to a first position wherein said first axial passageway is closed, said valve means including (i) a lever arm affixed to said valve body member and mounted for pivotal movement between said first and a second position wherein said axial passageway is open; (ii) constriction means affixed to said lever arm for selectively constricting flow through said axial passageway, said constriction means in said first lever arm position completely closing said axial passageway and said constriction means in said second lever arm position fully opening said axial passageway; and (iii) resilient means for biasing said lever arm toward said first position; and (d) means for visually detecting arterial blood pulsations regardless of arterial blood pressure prior to selectively opening said axial passageway by moving said lever arm to said second position.

Claim 6

A device for extracting arterial blood utilizing a cannula or needle comprising: (a) a container member under vacuum and having a closed end and an open end; (b) a valve body member having a first end affixed to said open end of said container member and a second end sized to receive the cannula, said valve body member having a first axial passageway therethrough providing fluid communication between the cannula and said container member; (c) valve means affixed to said valve body member for regulating the flow of blood through said first axial passageway, said valve means normally biased to a first position wherein said first axial passageway is closed, said valve means including (i) a lever arm affixed to said valve body member and mounted for pivotal movement between said first and a second position wherein said axial passageway is open; (ii) constriction means affixed to said lever arm for selectively constricting flow through said axial passageway, said constriction means in said first lever arm position completely closing said axial passageway and said constriction means in said second lever arm position fully opening said axial passageway; and (iii) resilient means for biasing said lever arm toward said first position; and (d) means for visually detecting arterial blood pulsations regardless of arterial blood pressure prior to selectively opening said axial passageway by moving said lever arm to said second position.

Claim 10

A device for extracting arterial blood utilizing a cannula or needle comprising: (a) a container member under vacuum having a closed end and an open end; (b) a valve body member having a first end sized to receive the cannula and the second end affixed to said open end of said container member, said valve body member having a first axial passageway therethrough, said axial passageway including a first portion proximate said first end of said valve body member and a second portion proximate said second end of said valve body member, said first and second portions having first and second inside diameters, respectively, said second inside diameter larger than said first inside diameter; (c) a tubular member received within said second portion of said first axial passageway, said tubular member having a continuous side wall of flexible material, said side wall defining a second axial passageway aligned with said first portion of said first axial passageway thereby providing fluid communication between said first portion and said second end of said valve body member; (d) means for selectively pinching said side wall of said tubular member upon itself to open and close said second axial passageway, said pinching means normally biased to a first position wherein said second axial passageway is completely closed; and (e) means for visual detection of arterial blood pulsations.

Claim 11

A device for extracting arterial blood utilizing a cannula or needle comprising: (a) a container member under vacuum having a closed end and an open end; (b) a valve body member having a first end sized to receive the cannula and the second end affixed to said open end of said container member, said valve body member having a first axial passageway therethrough, said axial passageway including a first portion proximate said first end of said valve body member and a second portion proximate said second end of said valve body member, said first and second portions having first and second inside diameters, respectively, said second inside diameter larger than said first inside diameter; (c) a tubular member received within said second portion of said first axial passageway, said tubular member having a continuous side wall of flexible material, said side wall defining a second axial passageway aligned with said first portion of said first axial passageway thereby providing fluid communication between said first portion and said second end of said valve body member; (d) means for selectively pinching said side wall of said tubular member upon itself to open and close said second axial passageway, said pinching means normally biased to a first position wherein said second axial passageway is completely closed; and (e) means for visual detection of arterial blood pulsations.