CN2333350Y - Test tube type bloodletting syringe - Google Patents

Abstract

The utility model discloses a test tube type bloodletting syringe, which is composed of a needle tube, a needle head, a front puling rod and a rear pulling rod. The utility model is characterized in that a sleeve tube of the needle head is connected with the needle head and a small sleeve pipe for bottom sealing; the needle tube is provided with a rubber sealing ring inside; a small hole arranged on the rubber sealing ring is connected with the front pulling rod; the front pulling rod is mutually engaged with the rear pulling rod; the small sleeve tube for bottom sealing is provided with a rubber pad inside, and the head part of the needle tube is provided with a spiral thread, which is corresponding to the small sleeve tube for bottom sealing. The utility model has the advantages of simple structure, convenient operation, low cost, and convenient conveyance and storage of the sampled blood samples.

Description

Test-tube type's syringe of drawing blood

This utility model relates to a kind of test-tube type syringe of drawing blood, and is particularly useful for specimen clinical, that laboratory extracts blood.

The chemical examination of clinical patient blood drawing at present mainly contains following two kinds: a kind of is with the ordinary syringe of carrying out the medicine injection clinically, and earlier with patient blood sucking-off from blood vessel, seasoning in reinject glass and the plastic test tube is transferred to laboratory and tested.This syringe is made up of needle guard, syringe needle, syringe outer tube and interior several parts of push-and-pull plug (pole), and this operating procedure is many, and more complicated need other test tube storage blood after the blood drawing again, thereby use is inconvenient, and cost is higher relatively.In addition, the inconvenience of test tube storage blood is carried, spill easily, and blood vulnerable to pollution, haemolysis, preserve problems such as inconvenience.Another is: will have rubber closure teat glass be pumped into negative pressure in advance, reuse two has of metal needle plastic flexible pipe, thrust patient's blood vessel, thrust in the negative pressure glass tubing other end again, utilize the interior negative pressure of pipe that patient blood is sucked test tube, after blood drawing is finished, transfer to syringe needle, the problem that this operating procedure exists is: one, preparation technology is complicated, and cost is high relatively; Two, do not meet medical worker's use habit, make it to feel inconvenient; Three, there is the feared state of mind in patient, and this blood drawing method is had the sense of conflict; Four, be syringe needle when thrusting test tube, might cause rubber grain to fall in vitro, testing instruments are stopped up damage by rubber closure; Five, utilize negative pressure control blood drawing amount, inaccurate, easily cause problems such as blood volume is inaccurate.

The purpose of this utility model has provided a kind of test-tube type syringe of drawing blood, and has on the needle tubing head and the corresponding spiral screw thread of back cover small casing, and is simple in structure, easy to operate.

For achieving the above object, this utility model by the following technical solutions:

Test-tube type's syringe of drawing blood draws pole to constitute by back cover small casing, needle sleeve, syringe needle, needle tubing, front and back, syringe needle tube is a column type, the length thickness can be provided with as required, one of cylindrical needle tubing has a truncated cone-shaped hollow tubule, one of the round platform pipe is associated on the socket, adds the helical form screw thread above it.Simultaneously back cover has correspondingly helical form screw thread with the small casing inwall, coincide each other, the back cover small casing is an important actor shape, the bottom is an enclosed shape, liner is a valve rubber, after screw thread coincide on itself and the needle tubing head, can stop the outflow of syringe inner blood, the socket that blood is housed so can not come off when centrifugal, water-bath, plays firm storage blood effect.In the syringe pipe draw pole adopt before and after two parts, also be connected mutually with the spiral screw thread, the pole that draws that is associated in one during blood drawing can be negative pressure with taking out in the syringe, by syringe needle with in the vessel inner blood inspiration syringe.During storage blood, syringe needle is taken off, screw on the back cover small casing, will draw pole to pull to the syringe upper end simultaneously, the post-tensioning pole is taken off in derotation, and front pulling rod plays the effect of stopper.

Fig. 1 is test-tube type's syringe construction sketch map of drawing blood

Fig. 2 is the cooperation sketch map of Fig. 1

With reference to the accompanying drawings this utility model is described in further detail below:

According to Fig. 1, Fig. 2 as can be known, needle sleeve 2 links to each other with syringe needle 3, back cover small casing 1, back cover small casing 1 inwall has the spiral screw thread, valve rubber 10 is housed in back cover small casing 1, spiral screw thread and needle tubing head 5 screw fixing mutually, but its valve rubber 10 shutoff entry needle pores, not allowing, suction pipe inner blood outflows.Needle sleeve 2 is enclosed within on the syringe needle 3, is beneficial to protection syringe needle 3, in order to avoid the puncture outer package.Needle tubing head 4 links to each other with needle tubing 6, has on needle tubing head 4 and back cover small casing 1 corresponding spiral screw thread 5, can screw with back cover small casing 1 securely.Rubber sealing ring 7 is housed in the needle tubing 6, rubber sealing ring 7 links to each other with front pulling rod 8, it is engaged that front pulling rod 8 one ends are that a hollow has the aperture and the screw thread on the post-tensioning pole 9A of spiral, pull by the post-tensioning pole 9B that spins together, make needle tubing form negative pressure, blood is pumped in the needle tubing 6 by the syringe needle that thrusts blood vessel 3 that connects.

The utility model compared with prior art has the following advantages and effect:

Simple in structure, easy to operate, meet the blood drawing custom, medical personnel and patient are easy to accept the blood drawing amount Be easy to grasp, tailored version is furnished with corresponding anti-coagulants, saves time and saves trouble, convenient being suitable for. With existing blood drawing method phase Ratio, step is few, once finishes, need not aspirate back and forth, the specimen transfer of being convenient to draw blood and preservation, cost is low, Has widely social and economic effects.

Claims (4)

1, a kind of test-tube type syringe of drawing blood, it comprises that needle tubing (6), syringe needle (3), front and back draw pole (8), (9A), (9B) to constitute, it is characterized in that needle sleeve (2) links to each other with syringe needle (3), back cover small casing (1), rubber sealing ring (7) is housed in the needle tubing (6), has aperture to link to each other on the rubber sealing ring (7) with front pulling rod (8).

2, a kind of test-tube type according to claim 1 syringe of drawing blood is characterized in that back cover small casing (1) inwall has the spiral screw thread, is equipped with valve rubber (10) in back cover small casing (1).

3, a kind of test-tube type according to claim 1 syringe of drawing blood is characterized in that front pulling rod (8) one ends are that threaded aperture of a hollow belt and post-tensioning pole (9A) are engaged.

4, a kind of test-tube type according to claim 1 syringe of drawing blood is characterized in that having on the needle tubing head (4) and the corresponding spiral screw thread (5) of back cover small casing (1).