CN215534856U

CN215534856U - Internal fistula needle

Info

Publication number: CN215534856U
Application number: CN202121110323.8U
Authority: CN
Inventors: 梁秀; 黄雪芳; 伍小燕
Original assignee: Guigang City People's Hospital
Current assignee: Guigang City People's Hospital
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2022-01-18
Anticipated expiration: 2031-05-21

Abstract

The utility model discloses an internal fistula needle, which comprises a hose, a needle seat, a puncture steel needle and a sleeve, wherein one end of the hose is connected with a connector, a detachable heparin cap is connected with the connector, the other end of the hose is connected with one end of the needle seat, the puncture steel needle is fixed at the other end of the needle seat and communicated with the hose, the sleeve comprises an outer sleeve and an inner sleeve, the inner sleeve is slidably and coaxially sleeved in the outer sleeve, the sleeve is coaxially sleeved outside the puncture steel needle and fixedly connected with the needle seat, two sides of the axial section of the outer sleeve are respectively provided with symmetrical needle wings, a limiting part capable of preventing the inner sleeve from being separated from the outer sleeve is arranged between the outer sleeve and the inner sleeve, and the puncture steel needle can be completely wrapped after the inner sleeve extends out of the outer sleeve. The blood sample collection device is convenient for collecting blood samples, and can effectively avoid that medical workers are easily injured by acupuncture when cleaning and discarding.

Description

Internal fistula needle

Technical Field

The utility model relates to a medical appliance, in particular to an internal fistula needle.

Background

Hemodialysis is the process of utilizing blood purifier to eliminate various toxins and excessive water from patient's blood and replenish various beneficial matters to reach the aim of purifying blood. An internal fistula needle is an indispensable medical instrument in hemodialysis treatment and mainly comprises a stainless steel puncture needle tube, needle wings, a tube body, a catheter clamp, a joint and the like. During hemodialysis treatment, an extracorporeal circulation passage of blood is formed by puncturing an arteriovenous internal fistula of a patient and connecting the arteriovenous internal fistula with an extracorporeal circulation pipeline and a dialyzer. The blood sample is required to be collected before hemodialysis treatment of a general hemodialysis patient, usually, an injector is connected to an internal fistula puncture needle, and then the blood in the injector is distributed and injected into each blood collection tube, so that the method is inconvenient and the blood collection amount is inaccurate; and usually, after one dialysis (about 4 hours), the dialysis is pulled out and discarded for use, and because no protection device is arranged, the puncture steel needle is exposed, so that medical staff is easy to be injured by the puncture needle during cleaning and discarding, and pollution and infection are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an internal fistula needle which is convenient for blood collection and high in safety in view of the defects in the prior art.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

the utility model provides an internal fistula needle, includes hose, needle file, puncture steel needle and sleeve, the one end of hose is connected with and is provided with the connector, connector department is connected with detachable heparin cap, the one end of needle file is connected to the other end of hose, puncture steel needle fixes on the needle file other end and hose intercommunication, the sleeve includes outer sleeve and inner skleeve, the coaxial cover of inner skleeve slidable ground is established in the outer sleeve, the coaxial cover of sleeve is established outside puncture steel needle and outer sleeve and needle file fixed connection, the both sides of outer sleeve axial cross-section are provided with symmetrical needle wing respectively, be provided with the locating part that can prevent that the inner skleeve from breaking away from the outer sleeve between outer sleeve and the inner skleeve, the outer skleeve can wrap up puncture steel needle completely after stretching out.

As a further improvement of the above technical solution:

the outer sleeve is provided with a needle seat, the needle seat is provided with a needle hole, the needle hole is communicated with the needle seat, and the needle hole is communicated with the needle seat; the needle wing is connected with the outer sleeve through a sliding block, and the sliding block is positioned in the sliding groove and can move along the sliding groove; the outer wall epirelief that the needle file one end was kept away from to the inner skleeve is equipped with two cardboards, and the cardboard is provided with the draw-in groove towards one side of needle file, the needle wing can with the draw-in groove joint of cardboard after sliding off the outer skleeve.

The inner sleeve includes an extendable fold.

The folding part is a corrugated pipe.

The locating part includes spacing groove and stopper, the spacing groove is the cell body that sets up along its length direction on the outer sleeve inner wall, the stopper is the protruding lug of establishing on the inner sleeve is close to needle file one end outer wall, the stopper is located the spacing inslot and can be at the gliding lug of spacing inslot.

The internal diameter of inner skleeve is greater than the diameter of puncture steel needle, the inner skleeve both ends all are provided with the closing plate of central trompil, and the closing plate inboard of keeping away from needle file one end is provided with the flexible glue.

Compared with the prior art, the utility model has the advantages that:

the internal fistula needle is provided with the detachable heparin cap at the connector, and can be directly inserted into a blood taking needle to take blood into a test tube by utilizing negative pressure during blood taking, and hemodialysis can be performed after the blood taking is finished; the inner skleeve can slide for the outer skleeve, can wrap up the puncture steel needle completely with the inner skleeve roll-off after accomplishing the dialysis, can effectually avoid medical personnel to receive the acupuncture injury easily when clearance, abandonment.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments or the related art will be briefly introduced below, and it is obvious that the drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

Fig. 1 is a schematic view of an internal fistula needle configuration.

Fig. 2 is a cross-sectional view of an internal fistula needle sleeve and a piercing steel needle.

Fig. 3 is a structural schematic diagram of the inner sleeve of the internal fistula needle slipping out.

Fig. 4 is an enlarged view of fig. 3 at a.

Fig. 5 is an enlarged view of fig. 3 at B.

Fig. 6 is a schematic view of a configuration of an inner fistula needle outer sleeve.

Reference numbers in the figures: 1. a hose; 11. a connector; 2. a needle seat; 3. puncturing a steel needle; 4. a sleeve; 41. an outer sleeve; 42. an inner sleeve; 421. a folding part; 422. a sealing plate; 423. soft gum is carried out; 5. a heparin cap; 6. a needle wing; 61. a slider; 7. a limiting member; 71. a limiting groove; 72. a limiting block; 8. a chute; 81. a limiting section; 82. a moving section; 9. clamping a plate; 91. a clamping groove.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, there will now be described in detail, with reference to the accompanying drawings, a non-limiting detailed description of the present invention.

As shown in fig. 1 to 6, the internal fistula needle of the present embodiment includes a flexible tube 1, a needle holder 2, a piercing steel needle 3, and a sleeve 4.

One end of the hose 1 is connected with a connector 11, the connector 11 is connected with a detachable heparin cap 5, a blood taking needle can be inserted after the heparin cap 5 is connected, blood is taken by negative pressure blood taking, the hose is not easy to pollute, and the blood volume container is controlled. Wherein, heparin cap 5 and extracorporeal circulation pipeline connector all adopt threaded connection's mode to be connected with connector 11, of course, also can set the connector into Y font structure, and different connectors are connected to heparin cap 5 and extracorporeal circulation pipeline. The other end of the hose 1 is connected with one end of the needle base 2, and the puncture steel needle 3 is fixed on the other end of the needle base 2 and communicated with the hose 1.

The sleeve 4 comprises an outer sleeve 41 and an inner sleeve 42, wherein the sum of the length of the outer sleeve 41 and the length of the inner sleeve 41 is larger than the length of the puncture steel needle 3. The outer sleeve 4 is coaxially sleeved outside the puncture steel needle 3, and one end of the outer sleeve 4 close to the needle base 2 is fixedly connected with the needle base 2. Symmetrical sliding grooves 81 are respectively arranged on two sides of the axial section of the outer wall of the outer sleeve 41, each sliding groove 8 comprises a limiting section 81 and a moving section 82, the limiting sections 81 are arranged along the circumferential direction of the outer wall, the moving sections 82 are arranged along the axial direction of the outer wall, one end of each moving section is communicated with the limiting sections 81, and the other end of each moving section is communicated with the end part, far away from the needle base 2, of the outer sleeve 41. The needle wing 6 is connected to the sliding groove 8, wherein the needle wing 6 is connected to the sliding groove of the outer sleeve 41 through the sliding block 61, wherein the sliding block 61 can only slide along the moving section 82 to the end and then slide away from the outer sleeve 41 by using the prior art. Moving the needle wing 6 along the slide groove 8 may slide the needle wing 6 away from the outer sleeve 41. The inner wall of the outer sleeve 41 is provided with a limiting groove 71 along the length direction.

The inner sleeve 42 is slidably and coaxially sleeved between the outer sleeve 41 and the puncture steel needle 3, the inner diameter of the inner sleeve 42 is larger than the diameter of the puncture steel needle 3, sealing plates 422 with holes at the central positions are arranged at two ends of the inner sleeve 42, and soft rubber 423 is arranged on the inner sides of the sealing plates 422 far away from the needle base. And the outer wall of the corresponding position of the limiting groove 71 is provided with a limiting block 72 in a protruding way, the limiting groove 71 and the limiting block 72 jointly form a limiting piece 7, and the inner sleeve 42 is prevented from being separated from the outer sleeve 41 when sliding. The inner sleeve 42 can fully wrap the puncture steel needle 3 after extending out of the outer sleeve 41. The outer wall of the inner sleeve 42 at the end far away from the needle base 2 is convexly provided with two clamping plates 9, one end of each clamping plate 9 facing the needle base 2 is provided with a clamping groove 91, and the needle wing 6 can be clamped with the clamping groove 91 of the clamping plate 9 after sliding away from the outer sleeve 41 along the sliding groove. The inner sleeve can be withdrawn and the puncture steel needle 3 can be wrapped by applying force towards the needle point direction to the needle wing 6, then the force is applied to the inner sleeve 42, the needle point of the puncture steel needle 3 is inserted into the soft rubber 423, the retraction phenomenon of the inner sleeve is avoided, and the safety is higher.

To reduce the length of the sleeve 4 and facilitate puncturing, the inner sleeve 42 comprises an expandable fold 421, the fold 421 being a bellows. Therefore, the puncture is prevented from being influenced by the overlong length of the sleeve 4, and the puncture steel needle 3 can be completely wrapped.

The internal fistula needle is provided with the detachable heparin cap 5 at the connector 11, and only a blood taking needle is directly inserted into a test tube to take blood by utilizing negative pressure during blood taking, so that the internal fistula needle is not easy to pollute, and a blood volume container is controlled; the inner skleeve can slide for the outer skleeve, can wrap up the puncture steel needle completely with the inner skleeve roll-off after accomplishing the dialysis, can effectually avoid medical personnel to receive the acupuncture injury easily when clearance, abandonment.

It should be noted that the above-mentioned preferred embodiments are merely illustrative of the technical concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. Internal fistula needle, its characterized in that: including hose (1), needle file (2), puncture steel needle (3) and sleeve (4), the one end of hose (1) is connected with and is provided with connector (11), connector (11) department is connected with detachable heparin cap (5), the one end of needle file (2) is connected to the other end of hose (1), puncture steel needle (3) are fixed on needle file (2) the other end and hose (1) intercommunication, sleeve (4) include outer sleeve (41) and inner skleeve (42), inner skleeve (42) slidable ground coaxial sleeve is established in outer sleeve (41), sleeve (4) coaxial sleeve is established outside puncture steel needle (3) and outer sleeve (41) and needle file (2) fixed connection, outer sleeve (41) axial cross-section's both sides are provided with symmetrical needle wing (6) respectively, be provided with locating part (7) that can prevent inner skleeve (42) from breaking away from outer sleeve (41) between outer sleeve (41) and inner skleeve (42) The puncture steel needle (3) can be completely wrapped after the inner sleeve (42) extends out of the outer sleeve (41).

2. The internal fistula needle of claim 1, wherein: a sliding groove (8) is formed in the outer wall of the outer sleeve (41), the sliding groove (8) comprises a limiting section (81) and a moving section (82), the limiting section (81) is arranged along the circumferential direction of the outer wall, the moving section (82) is arranged along the axial direction of the outer wall, one end of the moving section is communicated with the limiting section (81), and the other end of the moving section is communicated with the end part, far away from the needle seat (2), of the outer sleeve (41); the needle wing (6) is connected with the outer sleeve (41) through a sliding block (61), and the sliding block (61) is positioned in the sliding groove (8) and can move along the sliding groove (8); the outer wall of one end, far away from the needle seat (2), of the inner sleeve (42) is convexly provided with two clamping plates (9), one side, facing the needle seat (2), of each clamping plate (9) is provided with a clamping groove (91), and the needle wing (6) can be clamped with the clamping grooves (91) of the clamping plates (9) after sliding away from the outer sleeve (41).

3. The internal fistula needle of claim 1 or 2, wherein: the inner sleeve (42) includes an expandable fold (421).

4. The internal fistula needle of claim 3, wherein: the folding part (421) is a corrugated pipe.

5. The internal fistula needle of claim 1, wherein: the limiting piece (7) comprises a limiting groove (71) and a limiting block (72), the limiting groove (71) is a groove body formed in the inner wall of the outer sleeve (41) along the length direction of the limiting groove, the limiting block (72) is a protruding block formed in the outer wall of one end, close to the needle seat (2), of the inner sleeve (42), and the limiting block (72) is located in the limiting groove (71) and can slide in the limiting groove (71).

6. The internal fistula needle of claim 1, wherein: the inner diameter of inner skleeve (42) is greater than the diameter of puncture steel needle (3), inner skleeve (42) both ends all are provided with central point and put trompil closing plate (422), and closing plate (422) inboard of keeping away from needle file (2) one end is provided with flexible glue (423).