DISPOSABLE PEN-TYPE BLOOD-RETURN-VISIBLE AND ANTI-REFLUX VENOUS BLOOD COLLECTION NEEDLE

Abstract

The present invention relates to the field of medical appliances, and specifically, to a disposable pen-type blood-return-visible and anti-reflux venous blood collection needle, comprising a venous puncture needle and a transparent needle seat. A one-way valve fixation seat is arranged in a cavity of the transparent needle seat, and an anti-reflux one-way valve is mounted on the one-way valve fixation seat. The one-way valve fixation seat is plugged from a front end of the needle seat and mounted in the cavity of the needle seat. A tail end of the venous puncture needle is plugged and mounted in a blood inlet of the one-way valve fixation seat. A tail end of a puncture-end protective cover is sleeved over an outer wall of a front portion of the needle seat. A tube-plug puncture needle is plugged and mounted in a blood outlet on a tail portion of the needle seat, and a latex sheath is sleeved over the tube-plug puncture needle. An abutting-end protective cover is sleeved over the latex sheath, and a front end of the abutting-end protective cover is sleeved over an outer wall of the tail end of the puncture-end protective cover. The present invention can prevent blood in a negative-pressure blood collection container from suddenly flowing back to the human body, and can greatly reduce waste of a blood sample as the blood sample directly enters the needle seat through the venous puncture needle.

Claims

1. A disposable pen-type blood-return-visible and anti-reflux venous blood collection needle, comprising a venous puncture needle (6), wherein a puncture-end protective cover (5) is sleeved over a needle body of the venous puncture needle (6); and further comprising a needle seat (4), wherein a one-way valve fixation seat (7) is arranged in a cavity of the needle seat (4), and an anti-reflux one-way valve (8) is mounted on the one-way valve fixation seat (7); the one-way valve fixation seat (7) is plugged from a front end of the needle seat (4) and mounted in the cavity of the needle seat (4); a tail end of the venous puncture needle (6) is plugged and mounted in a blood inlet of the one-way valve fixation seat (7); a tail end of the puncture-end protective cover (5) is sleeved over an outer wall of a front portion of the needle seat (4); a tube-plug puncture needle (1) for connecting to a negative-pressure blood collection container is plugged and mounted in a blood outlet on a tail portion of the needle seat (4), and a latex sheath (3) is sleeved over the tube-plug puncture needle (1); and an abutting-end protective cover (2) is sleeved over the latex sheath (3), and a front end of the abutting-end protective cover (2) is sleeved over an outer wall of the tail end of the puncture-end protective cover (5).

Description

BRIEF DESCRIPTION OF THE DRAWING

[0008] FIG. 1 is a schematic structural diagram according to an embodiment of the present invention; and

[0009] FIG. 2 is a schematic explosive structural diagram according to an embodiment of the present invention.

DETAILED DESCRIPTION

[0010] The following describes the present invention in further detail with reference to the accompanying drawings and specific embodiments.

[0011] Referring to FIG. 1 and FIG. 2, the disposable pen-type blood-return-visible and anti-reflux venous blood collection needle in the present invention comprises a venous puncture needle 6 and a needle seat 4. A puncture-end protective cover 5 is sleeved over a needle body of the venous puncture needle 6. A one-way valve fixation seat 7 is arranged in a cavity of the needle seat 4, and an anti-reflux one-way valve 8 is mounted on the one-way valve fixation seat 7. The one-way valve fixation seat 7 is plugged from a front end of the needle seat 4 and mounted in the cavity of the needle seat 4. A tail end of the venous puncture needle 6 is plugged and mounted in a blood inlet of the one-way valve fixation seat 7. A tail end of the puncture-end protective cover 5 is sleeved over an outer wall of a front portion of the needle seat 4. A tube-plug puncture needle 1 for connecting to a negative-pressure blood collection container is plugged and mounted in a blood outlet on a tail portion of the needle seat 4, and a latex sheath 3 is sleeved over the tube-plug puncture needle 1. An abutting-end protective cover 2 is sleeved over the latex sheath 3, and a front end of the abutting-end protective cover 2 is sleeved over an outer wall of the tail end of the puncture-end protective cover 5.

[0012] During venous blood collection from the human body, the puncture-end protective cover 5 is taken off first, a vein is punctured by using the venous puncture needle 6, blood enters the transparent needle seat 4 through the one-way valve fixation seat 7, the anti-reflux one-way valve 8 is opened, and the blood enters the tube-plug puncture needle 1 from the blood outlet of the needle seat 4 and enters the negative-pressure blood collection container through the tube-plug puncture needle 1. After blood collection is completed, the negative-pressure blood collection container is pulled out and the anti-reflux one-way valve 8 is closed immediately, thereby preventing the blood in the negative-pressure blood collection container from suddenly flowing back to the human body. In this way, the negative-pressure blood collection container is totally isolated from the human body, that is, no damage would be caused to the human body even if the negative-pressure blood collection container is not sterile, and whether blood flows out during blood collection can be clearly seen.

[0013] The foregoing shows and describes the basic principle, main features, and technical advantages of the present invention. A person skilled in the art should understand that the described embodiments are merely for describing the principle of the present invention, various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and all such changes and improvements shall fall into the protection scope of the present invention. The protection scope of the present invention is subject to the appended claims and equivalents thereof.