CN219050093U

CN219050093U - Injector for radiopharmaceuticals

Info

Publication number: CN219050093U
Application number: CN202222719202.4U
Authority: CN
Inventors: 章素丹; 李嘉; 朱宏辉; 李晓红; 陈佳佳; 魏惠娇
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-05-23
Anticipated expiration: 2032-10-14

Abstract

The utility model discloses a radioactive medicine injector, which comprises a needle cylinder, wherein push rods and needles are respectively sleeved at two ends of the needle cylinder in a sliding way, a lead sleeve is sleeved at the outer side of the needle cylinder, an injection hole structure capable of being opened and closed for the needles to penetrate out is arranged at the far end of the lead sleeve, and a retraction mechanism capable of retracting the needles into the lead sleeve is arranged in the needle cylinder. The utility model has the advantages of effectively shielding radiation and reducing occupational injury to staff.

Description

Injector for radiopharmaceuticals

Technical Field

The utility model relates to the field of medical instruments, in particular to a syringe for radiopharmaceuticals.

Background

The radioactive drug is a radioactive nuclide preparation or a labeled compound thereof for clinical diagnosis or treatment, and the radioactive nuclide contained in the radioactive drug can emit rays, so that the radioactive drug can cause radiation injury to staff in the operation process, and serious influence can reach occupational injury.

In order to reduce the radiation damage to medical staff, the utility model patent with the publication number of CN213192109U discloses an auxiliary mechanism for a radioactive injector, and the auxiliary mechanism can effectively shield rays emitted from the injector by medicines by sleeving a radiation shielding cylinder made of lead material on the periphery of an injection cylinder, reduce the radiation quantity of the radioactive isotope to the medical staff and play a role in radiation protection for the staff. However, after the end of the injection of the radiopharmaceutical, the injection needle is still exposed to the outside of the radiation shielding barrel, and the residual radiopharmaceutical in the injection needle releases radiation, and after the needle is pulled out of the body, the residual radiopharmaceutical may flow out over time and remain outside, causing continuous occupational injury to staff.

How to solve the problems is a technical problem to be solved.

Disclosure of Invention

The utility model aims to provide a radiopharmaceutical syringe which can effectively shield radiation and reduce occupational injury to staff.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a radioactive medicine injector, which comprises a needle cylinder, wherein push rods and needles are respectively sleeved at two ends of the needle cylinder in a sliding way, a lead sleeve is sleeved at the outer side of the needle cylinder, an injection hole structure capable of being opened and closed for the needles to penetrate out is arranged at the far end of the lead sleeve, and a retraction mechanism capable of retracting the needles into the lead sleeve is arranged in the needle cylinder.

Further, the lead sleeve comprises a barrel, the injection hole structure is arranged at the far end of the barrel, the near end of the barrel is an open end, the end is detachably connected with an end cover, the far end of the end cover abuts against the near end of the needle cylinder, and a first through hole for the near end of the push rod to penetrate out is formed in the end cover.

Further, the injection hole structure comprises an end plate, a second through hole for a needle to penetrate is formed in the end plate, which is arranged at the far end of the cylinder, a plate cavity communicated with the second through hole is formed in the end plate, a sealing plate is sleeved in the plate cavity in a sliding mode, one end of the sealing plate is connected with the plate cavity through at least one closed hole spring, the other end of the sealing plate is in interference fit with the needle, a strip-shaped opening is formed in one side, far away from the needle cylinder, of the end plate, the strip-shaped opening is communicated with the plate cavity, a pushing handle is sleeved in the strip-shaped opening in a sliding mode, and the proximal end of the pushing handle stretches into the plate cavity to be connected with the sealing plate.

Further, the syringe needle includes the needle body, the distal end of needle cylinder is located to the one end slip cap of needle body and the other end of this needle body is worn out outside the plumbous cover and this end and shrouding interference fit through distal end, the second through-hole of needle cylinder in proper order to and, the both ends of above-mentioned needle body are provided with needle tubing, annular needle file respectively, the needle cylinder communicates with the external world through needle body, needle tubing in proper order.

Further, the retraction mechanism comprises a retraction spring and a plurality of elastic cards distributed in an annular array, wherein the retraction spring is sleeved on the outer side of the needle body, the distal end of the retraction spring is connected with the needle cylinder, the proximal end of the retraction spring abuts against the distal end face of the needle seat, one end of each elastic card is connected with the inner wall of the needle cylinder, the other end of each elastic card inclines towards the direction close to the needle head, and the end abuts against the proximal end face of the needle seat.

Further, the push rod comprises a rod body, the proximal end of the rod body penetrates out of the cylinder body through the first through hole, the distal end of the rod body is provided with a piston head, the distal end of the rod body is provided with an inserting ring, the rod body is internally provided with a containing cavity, the proximal end of the inserting ring is communicated with the containing cavity, the proximal end of the inserting ring penetrates out of the piston head and is in sliding sleeve joint with the needle head, and a rubber plug is movably sleeved in the inserting ring.

The proximal end of the cylinder body is provided with a positioning ring which is in sliding fit with the needle cylinder.

Due to the adoption of the structure, the utility model has the following beneficial effects:

according to the utility model, the lead sleeve is sleeved outside the needle cylinder, so that radiation of the radioactive drug can be effectively shielded, and the retraction mechanism is arranged, so that after drug injection is completed, the needle head is controlled to retract into the lead sleeve through the injection hole structure by the retraction mechanism, and the injection hole structure is closed, so that the needle head is prevented from being exposed to the outside, and occupational injury to workers caused by radiation released by the residual drug in the needle head and even dropped on the ground is avoided.

The utility model will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate embodiments of the utility model.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of the needle of the present utility model when extended;

FIG. 2 is a schematic view of the overall structure of the needle of the present utility model when retracted;

fig. 3 is a schematic view of an injection hole structure of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 3, the syringe for radiopharmaceuticals provided by the utility model comprises a syringe 1, wherein push rods 2 and needles 3 are respectively sleeved at two ends of the syringe 1 in a sliding manner, a lead sleeve 4 is sleeved at the outer side of the syringe 1, an injection hole structure 5 capable of being opened and closed for the needles 3 to penetrate out is arranged at the far end of the lead sleeve 4, and a retraction mechanism 6 capable of retracting the needles 3 into the lead sleeve 4 is arranged in the syringe 1. When in use, the needle cylinder 1 is sleeved in the lead sleeve 4, so that radiation can be effectively reduced, and the needle head 2 extends out of the lead sleeve 4 from the injection hole structure 5, so that normal injection of medicines is not influenced; when the injection of the drug is completed, the retraction mechanism 6 controls the needle 3 to retract into the lead sheath 4 and the injection aperture structure 5 is closed, thereby avoiding the radioactive drug remaining in the external environment.

In the present utility model, the lead sheath 4 includes a barrel 41, the injection hole structure 5 is disposed at a distal end of the barrel 41, and a proximal end of the barrel 41 is an open end and is detachably connected with an end cover 42, the distal end of the end cover 42 abuts against the proximal end of the syringe 1, and a first through hole 43 for the proximal end of the push rod 2 to pass through is formed in the end cover 42. The end cover 42 is in threaded connection with the proximal end of the barrel 41, and when the injection is finished, the end cover 42 can be opened in a rotating way to take the syringe 1 out of the lead sleeve 4, so that the lead sleeve 4 can be reused.

In the utility model, the injection hole structure 5 comprises an end plate 51, the end plate 51 is arranged at the far end of the cylinder 41, a second through hole 52 for the needle 3 to penetrate is formed in the end plate 51, a plate cavity 53 communicated with the second through hole 52 is formed in the end plate 51, a sealing plate 54 is sleeved in the plate cavity 53 in a sliding manner, one end of the sealing plate 54 is connected with the plate cavity 53 through at least one closed hole spring 57, the other end of the sealing plate 54 is in interference fit with the needle 3, when the retraction mechanism 6 controls the needle 3 to retract into the lead sleeve 4 until the sealing plate 54 is not contacted with the needle 3, the closed hole spring 57 pushes the sealing plate 54 to slide towards the extending direction of the closed hole spring 57, so that the second through hole 52 is covered, and leakage of liquid medicine and radiation from the second through hole 52 to the outside is prevented; and a strip-shaped opening 55 is formed in one side, far away from the needle cylinder 1, of the end plate 51, the strip-shaped opening 55 is communicated with the plate cavity 53, a push handle 56 is sleeved in the strip-shaped opening 55 in a sliding manner, the proximal end of the push handle 56 stretches into the plate cavity 53 to be connected with the sealing plate 54, the push handle 56 is pushed to slide along the strip-shaped opening 55, and the opening and closing of the sealing plate 54 can be manually controlled. In the present utility model, the number of the closed springs 57 is two, and the closed springs are symmetrically disposed on two sides of the end surface of the sealing plate 54 away from the second through hole 52.

In the utility model, the needle 3 comprises a needle body 31, and the needle body 31 is in sliding fit with the second through hole 52; one end of the needle body 31 is slidably sleeved at the distal end of the needle cylinder 1, the other end of the needle body 31 sequentially passes through the distal end of the needle cylinder 1 and the second through hole 52 to penetrate out of the lead sleeve 4 and is in interference fit with the sealing plate 54, the needle tube 32 and the annular needle seat 33 are respectively arranged at two ends of the needle body 31, the needle cylinder 1 sequentially passes through the needle body 31 and the needle tube 32 to be communicated with the outside, and medicines in the needle cylinder 1 can be sequentially injected into a human body through the needle body 31 and the needle tube 32.

In the utility model, the retraction mechanism 6 comprises a retraction spring 61 and a plurality of elastic cards 62 distributed in an annular array, wherein the retraction spring 61 is sleeved on the outer side of the needle body 31, the distal end of the retraction spring 61 is connected with the needle cylinder 1, the proximal end of the retraction spring 61 abuts against the distal end face of the needle seat 33, and after injection is finished, the needle head 3 can be pushed to move towards the direction close to the push rod 2 by the retraction spring 61, so that the purpose of retracting the needle head 3 is achieved; one end of each elastic card 62 is connected with the inner wall of the syringe 1, the other end of each elastic card 62 is inclined towards the direction approaching the needle 3, and the end abuts against the proximal end face of the needle seat 33, so that the retraction spring 61 can be kept in a compressed state between the injection of the medicine and the displacement of the needle 3 is limited.

In the present utility model, the push rod 2 includes a rod 21, a proximal end of the rod 21 passes through the first through hole 43 and out of the cylinder 41, a piston head 22 is disposed at a distal end of the rod 21, an insert ring 23 is disposed at the distal end of the rod 21, and a receiving cavity 24 is disposed in the rod 21 for receiving the retracted needle 3; the inner diameter of the insertion ring 23 is larger than the outer diameter of the needle seat 33, and the outer diameter of the insertion ring 23 is smaller than the inner diameter of a circle formed by connecting one end of each elastic card 62 with the inner wall of the needle cylinder 1; the proximal end of the insertion ring 23 is communicated with the accommodating cavity 24, the proximal end of the insertion ring 23 penetrates out of the piston head 22 to be in sliding sleeve joint with the needle head 3, and a rubber plug 25 is movably sleeved in the insertion ring 23. The rubber plug 25 is fixed in the insertion ring 23 by friction force to prevent the medicine in the syringe 1 from flowing into the accommodating cavity 24; when the push rod 2 is pushed to inject, the insert ring 23 moves towards the direction approaching the needle 3 until the insert ring 23 is inserted between the elastic clamping pieces 62, so that each elastic clamping piece 62 is propped up, one end of each elastic clamping piece 62, which is propped against the needle seat 33, is deflected towards the direction approaching the inner wall of the needle cylinder 1 until each elastic clamping piece 62 is not contacted with the needle seat 33, and the retraction spring 61 can extend towards the direction approaching the rod body 21 at the moment, so that the needle 3 is pushed to retract.

In the present utility model, the proximal end of the barrel 41 is provided with a positioning ring 411, and the positioning ring 411 is slidably engaged with the syringe 1, so that the syringe 1 can be kept coaxial with the barrel 41.

When the radioactive drug syringe is used, firstly, the syringe 1 filled with radioactive drug is placed in the cylinder 41, the pushing handle 56 is pushed to slide towards the compression direction of the closed hole spring 57 to open the second through hole 52, after one end of the needle tube 32 and the needle body 31 far away from the syringe 1 extends out of the cylinder 41, the pushing handle 56 is released, the closed hole spring 57 pushes the sealing plate 54 to slide towards the extension direction of the closed hole spring 57 until the sealing plate 54 abuts against the needle body 31, and then the end cover 42 is screwed in a rotating way; when the medicine is injected, the rod body 21 drives the inserting ring 23 to move towards the direction close to the needle head 3 until the inserting ring 23 is inserted between the elastic clamping pieces 62, the elastic clamping pieces 62 are propped up by the inserting ring 23, one end of each elastic clamping piece 62, which is propped against the needle seat 33, deflects towards the direction close to the inner wall of the syringe 1 until the elastic clamping pieces 62 are not contacted with the needle seat 33, the retraction spring 61 is separated from a limiting state and stretches, the needle head 3 is pushed to move towards the direction close to the push rod 2, and when the needle head 3 is completely rebounded into the lead sleeve 4, the sealing plate 54 is not contacted with the needle head 3, the closed hole spring 57 can continuously push the sealing plate 54 to slide towards the stretching direction of the closed hole spring 57 until the second through hole 52 is sealed by the sealing plate 54, and therefore leakage of medicine liquid medicine and radiation from the second through hole 52 to the outside can be prevented.

The preferred embodiments of the present utility model have been described above. It is to be understood that the utility model is not limited to the specific embodiments described above, wherein devices and structures not described in detail are to be understood as being implemented in a manner common in the art; any person skilled in the art can make many possible variations and modifications to the technical solution of the present utility model or modifications to equivalent embodiments without departing from the scope of the technical solution of the present utility model, using the methods and technical contents disclosed above, without affecting the essential content of the present utility model. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A syringe for radiopharmaceuticals, comprising a barrel (1); the method is characterized in that: the needle cylinder is characterized in that push rods (2) and needles (3) are respectively sleeved at two ends of the needle cylinder (1) in a sliding mode, a lead sleeve (4) is sleeved on the outer side of the needle cylinder (1), an injection hole structure (5) capable of being opened and closed and used for allowing the needles (3) to penetrate out is arranged at the far end of the lead sleeve (4), and a retraction mechanism (6) capable of enabling the needles (3) to retract into the lead sleeve (4) is arranged in the needle cylinder (1).

2. A radiopharmaceutical syringe according to claim 1, wherein: the lead sleeve (4) comprises a barrel body (41), the injection hole structure (5) is arranged at the far end of the barrel body (41), the near end of the barrel body (41) is an open end, the end is detachably connected with an end cover (42), the far end of the end cover (42) abuts against the near end of the needle cylinder (1), and a first through hole (43) for the near end of the push rod (2) to penetrate out is formed in the end cover (42).

3. A radiopharmaceutical syringe according to claim 2, wherein: the injection hole structure (5) comprises an end plate (51), a second through hole (52) for a needle (3) to penetrate is formed in the end plate (51) at the far end of the cylinder body (41) and in the end plate (51), a plate cavity (53) communicated with the second through hole (52) is formed in the end plate (51), a sealing plate (54) is sleeved in the plate cavity (53) in a sliding mode, one end of the sealing plate (54) is connected with the plate cavity (53) through at least one closed hole spring (57), the other end of the sealing plate (54) is in interference fit with the needle (3), a strip-shaped opening (55) is formed in one side, far away from the cylinder (1), of the end plate (51), the strip-shaped opening (55) is communicated with the plate cavity (53), a pushing handle (56) is sleeved in the strip-shaped opening (55), and the proximal end of the pushing handle (56) stretches into the plate cavity (53) to be connected with the sealing plate (54).

4. A radiopharmaceutical syringe according to claim 3, wherein: the needle head (3) comprises a needle body (31), one end of the needle body (31) is slidably sleeved at the far end of the needle cylinder (1), the other end of the needle body (31) sequentially passes through the far end of the needle cylinder (1), the second through hole (52) and penetrates out of the lead sleeve (4) to be in abutting fit with the sealing plate (54), needle tubes (32) and annular needle seats (33) are respectively arranged at two ends of the needle body (31), and the needle cylinder (1) is sequentially communicated with the outside through the needle body (31) and the needle tubes (32).

5. A radiopharmaceutical syringe according to claim 4, wherein: the retraction mechanism (6) comprises a retraction spring (61) and a plurality of elastic cards (62) distributed in an annular array, wherein the retraction spring (61) is sleeved on the outer side of the needle body (31), the far end of the retraction spring (61) is connected with the needle cylinder (1), the near end of the retraction spring (61) abuts against the far end face of the needle seat (33), one end of each elastic card (62) is connected with the inner wall of the needle cylinder (1), and the other end of each elastic card (62) is inclined towards the direction close to the needle head (3) and abuts against the near end face of the needle seat (33).

6. A radiopharmaceutical syringe according to claim 5, wherein: push rod (2) include body of rod (21), the proximal end of body of rod (21) wears out outside barrel (41) and the distal end of this body of rod (21) is provided with piston head (22) through first through-hole (43), and, the distal end of above-mentioned body of rod (21) is provided with inserts ring (23) and has seted up in this body of rod (21) and hold chamber (24), insert the proximal end and hold chamber (24) intercommunication of ring (23) and this insert the proximal end of ring (23) wear out outside piston head (22) with needle (3) slip socket cooperation, and insert ring (23) interior movable sleeve and be equipped with rubber stopper (25).

7. A radiopharmaceutical syringe according to any one of claims 2 to 6, wherein: the proximal end of the cylinder body (41) is provided with a positioning ring (411), and the positioning ring (411) is in sliding fit with the needle cylinder (1).