Lateral recess puncture remaining needle

Abstract

The invention discloses a lateral recess puncture remaining needle, and relates to the technical field of medical instruments, the lateral recess puncture remaining needle comprises a matching part, an abutting part and a control part, a pulsator is shifted by fingers, the pulsator can only rotate for half a circle under single control due to the fact that only the part of the pulsator on the outer side of a control frame can be shifted, and the pulsator can only rotate for half a circle due to the fact that the screw pitch of a screw is 2 mm. The screw rod is limited by the fixing plate in the square groove of the limiting column, the screw rod cannot rotate, finally, the screw rod moves upwards by 1 mm, the abutting ring moves upwards by 1 mm under the clamping connection of the sliding teeth and the fixing teeth, the pushing space of an indwelling needle by an operator is only 1 mm, puncture safety is guaranteed, and after back suction and pushing injection are not subjected to resistance any more, the screw rod cannot rotate, and the screw rod cannot move upwards by 1 mm. And medicine injection is carried out through the lateral recess puncture remaining needle.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a lateral recess puncture indwelling needle. Background Art

[0002] The lateral recess is located in the lateral spinal canal, with the front side being the posterior edge of the vertebral body, the back side being the junction of the front of the superior articular process with the lamina and pedicle, and the outside being the inner surface of the pedicle; the inner entrance is equivalent to the front edge of the superior articular process; the lateral recess is the outward-sunken part on both sides of the vertebral body foramen, forming a spinal nerve root channel outward and downward, which is continuous with the intervertebral foramen; the lateral recess is the narrowest part of the spinal canal, and as a channel for nerve roots, the smaller the sagittal diameter of the lateral recess and the larger the transverse diameter, the narrower and deeper the lateral recess. Lateral recess stenosis and compression of nerve roots are the main causes of low back and leg pain; in pain treatment, doctors can place a catheter near the lateral recess through puncture for continuous injection of drugs;

[0003] In summary, the following technical problems exist in the current lateral recess puncture for indwelling needle placement: Since some vertebral structures need to avoid the dura mater to prevent cerebrospinal fluid loss, the anesthesiologist performs epidural injection through the intervertebral foramen, usually through the posterior median approach, through the interspinous ligament and yellow ligament to reach between the vertebral bodies, or through the paramedian approach, breaking through the yellow ligament next to the interspinous ligament; the intervertebral foramen is a structure composed of the upper and lower articular processes and the upper and lower pedicles. The intervertebral foramen is divided into an inner hole and an outer hole on both sides according to the spatial position. The posterior median approach and the paramedian approach are usually used to inject epidural fluid between the vertebral bodies. The median approach targets the intervertebral foramen and enters the inner hole of the intervertebral foramen, but the lateral recess is blocked by bones in this direction. Therefore, the injection work of the lateral recess puncture and retention has the function of releasing the drug near the lateral recess at the inner hole. The drug flows into the lateral recess by releasing the direction of the drug, the lateral body position and gravity. Therefore, when puncturing the lateral recess, it is necessary to get as close to the lateral recess as possible. The vertebral body has a low front and high back structure at the inner hole. In order to avoid hitting the epidural, when puncturing the lateral recess, the needle tip is tilted on the side of the inner hole to the lower vertebra and reaches the lower vertebra. After the vertebral plate is placed, move along the vertebral plate to the edge of the vertebral plate, that is, the insertion point of the yellow ligament, which is 3-5mm thick. Push the drug for injection, so that the drug flows into the spinal canal and then reaches the lateral recess, or insert the needle into the articular process next to the spinous process, with the side hole of the needle tip close to the operator's side; finally, use the syringe to inhale a certain amount of air and connect it to the indwelling needle, and insert the needle 1mm several times. Every time the needle is inserted 1mm, use the syringe to aspirate and push. Because the yellow ligament has not been broken through, the syringe cannot aspirate and push. When aspiration is successful, the epidural space is reached. , followed by injection of medicine. During the puncture and insertion of the lateral recess, bony structures such as lamina and articular process are often used as initial anchor points to ensure safety and to be as close as possible to the lateral recess blocked by the bones. During subsequent needle insertion, experienced surgeons can rely on the feeling of failure during the breakthrough to judge the puncture progress and directly insert the needle, while inexperienced surgeons rely on multiple micro-injections and back-suction and pushing actions to make judgments to prevent puncturing the epidural mater. Inserting the needle 1mm each time is also difficult for inexperienced surgeons, and it is difficult to grasp the needle insertion distance. Summary of the Invention

[0004] In response to the above-mentioned problems existing in the prior art, the present invention provides a lateral recess puncture indwelling needle, which limits the needle insertion distance each time by setting a limit structure, assists the operator in needle insertion, and ensures needle insertion safety.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] A lateral recess puncture indwelling needle comprises a matching part, an abutment part and a control part, the matching part comprises a syringe and a pushing assembly, a column head is provided on the lower side of the syringe, and the pushing assembly is arranged on one side of the column head of the syringe; an abutment part is provided on the lower side of the syringe, the abutment part comprises an abutment assembly and a sliding clamping assembly, and the sliding clamping assembly is slidably connected to the abutment assembly; the syringe is provided with a control part on the upper side of the abutment part, the control part comprises a control assembly and a fixed clamping assembly, and the control assembly is connected to the fixed clamping assembly; the sliding clamping assembly and the fixed clamping assembly are matched through the pushing assembly.

[0007] Furthermore, the lower side of the injection cylinder is fixedly connected to a base plate, and the column head is fixedly connected to the base plate; the pushing assembly includes a pressure ring, an extension plate, a fixing frame, a pushing inclined plane block, a pushing compression spring, a connecting plate and a connecting rod, the pressure ring is sleeved on the column head, a fixed compression spring is fixedly connected between the pressure ring and the base plate, the fixing frame is fixedly connected to the base plate, a pushing inclined plane block is slidably connected to the fixing frame, the pressure ring is fixedly connected to an extension plate on the side close to the pushing inclined plane block, the pushing inclined plane block is fixedly connected to a pushing compression spring in the fixing frame, the pushing compression spring is fixedly connected to a connecting plate on the side away from the pushing inclined plane block, the connecting rod is slidably connected in the fixing frame, the connecting plate is fixedly connected to a connecting rod, the connecting rod passes through the fixing frame, and the connecting rod is slidably connected to the fixing frame.

[0008] Furthermore, the bottom plate is fixedly connected to a limiting column on one side close to the fixing frame, and a square groove is opened in the middle of the limiting column;

[0009] The sliding clamping assembly includes a slide plate, and the slide plate is fixedly connected with a sliding tooth;

[0010] The fixed clamping assembly includes a fixed plate, a fixed tooth is fixedly connected to the fixed plate, the sliding tooth is arranged corresponding to the fixed tooth, and the sliding plate and the fixed plate are slidably connected in the square groove;

[0011] The connecting rod passes through the limiting column, and the connecting rod is slidably connected to the limiting column. One end of the connecting rod is fixedly connected to an inner shaft in the limiting column, and a roller is rotatably connected to the inner shaft. The roller protrudes from the connecting rod on the side away from the connecting plate, and the roller abuts against the slide.

[0012] The sliding teeth and the fixed teeth are in a separated state in a default state.

[0013] Furthermore, the fixing frame is slidably connected to the limiting inclined surface block when pushing the inclined surface block away from the bottom plate. A limiting compression spring is fixedly connected between the limiting inclined surface block and the fixing frame. The distance between the limiting inclined surface block and the bottom plate is equal to the thickness of the extension plate.

[0014] Furthermore, the abutment assembly includes a connecting rod and an abutment ring, the upper side of the connecting rod is slidably connected in the limiting column, the lower end of the slide is slidably connected to the connecting rod, and the lower end of the connecting rod is fixedly connected to the abutment ring, which is located on the side of the connecting rod close to the column head.

[0015] Furthermore, a transverse groove is formed at the upper end of the connecting rod, a lower slider is fixedly connected to the lower end of the slide, and the lower slider is slidably connected in the transverse groove;

[0016] The transverse groove and the lower sliding block are in a trapezoidal structure;

[0017] A vertical groove is opened on one side of the connecting rod, and the lower end of the inner side of the limiting column is fixedly connected to the limiting block, and the limiting block is slidably connected in the vertical groove. The vertical groove is on the lower side of the horizontal groove, and the limiting block is limited by the trapezoidal structure of the horizontal groove.

[0018] Furthermore, the control assembly includes a control frame, an impeller, an internal thread and a screw. The control frame is fixedly connected to the injection barrel. The control frame is rotatably connected to the screw. The control frame has an impeller rotatably provided in the middle. The impeller has an internal thread in the middle. The internal thread is threadably connected to the screw. The lower end of the screw is fixedly connected to the fixed plate.

[0019] Furthermore, the pitch of the screw is 2 mm, and the circumference of the impeller exposed outside the control frame is half of the overall circumference of the impeller.

[0020] Beneficial effects of the present invention:

[0021] The invention relates to a lateral recess puncture indwelling needle. When in use, the indwelling needle is first punctured to the position of the bone landmark. The same as the prior art, when the indwelling needle needs to be connected to the syringe of the prior art, the column head of the syringe of the present application is connected to the indwelling needle. At this time, the connecting rod and the slide plate slide freely in the square groove of the limiting column, so that the abutment ring fits the skin next to the puncture position of the indwelling needle; the connection of the indwelling needle pushes the pressure ring, so that the extension plate passes through the limiting inclined plane block and is limited by the limiting inclined plane block to a position close to the bottom plate. After the extension plate approaches the bottom plate, it pushes the slide plate to slide by pushing the inclined plane block, the connecting rod and the roller. The slide plate slides on the connecting rod through the lower slider and is limited by the sliding teeth and the fixed teeth. Due to the abutment ring, the connecting rod, The positioning of the slide, fixed plate and screw limit the insertion of the indwelling needle. When performing the subsequent action of "re-absorb and push-in of the syringe every 1mm of needle insertion", the impeller is moved by fingers. Since only the part of the impeller on the outside of the control frame can be moved, the impeller can only rotate half a circle under single control. Due to the 2mm pitch of the screw, the screw is limited by the fixed plate in the square groove of the limiting column and cannot rotate, which eventually causes the screw to move upward by 1mm. Under the engagement of the sliding teeth and the fixed teeth, the abutment ring moves upward by 1mm. The operator has only 1mm of space to advance the indwelling needle, ensuring the safety of puncture. After the re-absorption and push-in are no longer subject to resistance, the indwelling needle is punctured through the lateral recess for drug injection.

[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic diagram of the overall structure of the lateral recess puncture indwelling needle according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structural connection between the injection cylinder and the control frame according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic structural diagram of the injection barrel and the base plate according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic structural diagram of the injection cylinder and the pressure ring according to an embodiment of the present invention;

[0028] Figure 5 Schematic diagram of the cross-sectional structure of the lateral recess puncture indwelling needle according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic structural diagram of the extension plate and the fixing frame according to an embodiment of the present invention;

[0030] Figure 7 Schematic diagram of the structure of the connecting rod and the slide plate according to the embodiment of the present invention

[0031] Figure 8 A schematic structural diagram of a slide plate according to an embodiment of the present invention

[0032] Figure 9 Schematic diagram of the structure of the connecting rod according to an embodiment of the present invention

[0033] Figure 10 Schematic diagram of the cross-sectional structure of the limiting column according to an embodiment of the present invention

[0034] Figure 11 This is a schematic diagram of the structure of the push ramp block according to an embodiment of the present invention.

[0035] Figure 12 A schematic diagram of the structure of the control frame according to an embodiment of the present invention

[0036] Figure 13 Schematic diagram of the cross-sectional structure of the control frame according to an embodiment of the present invention

[0037] Figure 14 Schematic diagram of the structure of the screw and the fixing plate according to the embodiment of the present invention

[0038] Figure 15 Schematic diagram of the partial structure of the cross section of the lateral recess puncture indwelling needle according to an embodiment of the present invention.

[0039] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0040] 1-indwelling needle, 2-syringe, 201-base plate, 202-stigmoid, 203-limiting column, 204-square groove, 205-limiting block, 210-pressure ring, 211-extension plate, 212-fixed compression spring, 220-fixing frame, 221-limiting inclined plane block, 222-limiting compression spring, 223-pushing inclined plane block, 224-pushing compression spring, 225-connecting plate, 226-connecting rod, 227-inner shaft, 228-roller, 230-connecting rod, 231-vertical groove, 232-horizontal groove, 233-abutting ring, 234-slide plate, 235-lower slider, 236-sliding gear, 3-control frame, 301-pulsator, 302-internal thread, 303-screw, 304-fixing plate, 305-fixing gear. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] Example 1

[0043] like Figure 1-15 shown

[0044] The lateral recess puncture indwelling needle (1) of the present invention comprises a matching part, an abutting part and a control part, wherein the matching part comprises a syringe (2) and a pushing assembly, wherein a column head (202) is provided on the lower side of the syringe (2), and the pushing assembly is arranged on one side of the column head (202) of the syringe (2); an abutting part is provided on the lower side of the syringe (2), wherein the abutting part comprises an abutting assembly and a sliding clamping assembly, wherein the sliding clamping assembly is slidably connected to the abutting assembly; the syringe (2) is provided with a control part on the upper side of the abutting part, wherein the control part comprises a control assembly and a fixed clamping assembly, wherein the control assembly is connected to the fixed clamping assembly; the sliding clamping assembly and the fixed clamping assembly are matched via the pushing assembly;

[0045] The lower side of the injection cylinder (2) is fixedly connected to a base plate (201), and the column head (202) is fixedly connected to the base plate (201); the pushing assembly comprises a pressure ring (210), an extension plate (211), a fixing frame (220), a pushing inclined surface block (223), a pushing compression spring (224), a connecting plate (225) and a connecting rod (226); the pressure ring (210) is fitted on the column head (202), a fixed compression spring (212) is fixedly connected between the pressure ring (210) and the base plate (201), a fixing frame (220) is fixedly connected to the base plate (201), and a pushing inclined surface block (223) is slidably connected to the fixing frame (220). The surface block (223) is fixedly connected to an extension plate (211) on the side of the pressure ring (210) close to the push inclined surface block (223); the push inclined surface block (223) is fixedly connected to a push compression spring (224) in the fixed frame (220); the push compression spring (224) is fixedly connected to a connecting plate (225) on the side away from the push inclined surface block (223); the connecting rod (226) is slidably connected in the fixed frame (220); the connecting plate (225) is fixedly connected to the connecting rod (226); the connecting rod (226) passes through the fixed frame (220); and the connecting rod (226) is slidably connected to the fixed frame (220);

[0046] Example 2

[0047] like Figure 5-11 shown

[0048] The bottom plate (201) is fixedly connected to a limiting column (203) on one side close to the fixing frame (220), and a square groove (204) is provided in the middle of the limiting column (203);

[0049] The sliding clamping assembly includes a slide plate (234), and a sliding tooth (236) is fixedly connected to the slide plate (234);

[0050] The fixed clamping assembly includes a fixed plate (304), a fixed tooth (305) is fixedly connected to the fixed plate (304), the sliding tooth (236) is correspondingly arranged with the fixed tooth (305), and the sliding plate (234) and the fixed plate (304) are slidably connected in the square groove (204);

[0051] The connecting rod (226) passes through the limiting column (203), and the connecting rod (226) is slidably connected to the limiting column (203). One end of the connecting rod (226) is fixedly connected to an inner shaft (227) in the limiting column (203), and a roller (228) is rotatably connected to the inner shaft (227). The roller (228) protrudes from the connecting rod (226) on the side away from the connecting plate (225), and the roller (228) abuts against the slide plate (234).

[0052] The sliding teeth (236) and the fixed teeth (305) are in a separated state in a default state;

[0053] The fixing frame (220) is slidably connected to the limiting inclined surface block (221) on one side of the pushing inclined surface block (223) away from the bottom plate (201); a limiting compression spring (222) is fixedly connected between the limiting inclined surface block (221) and the fixing frame (220); and the distance between the limiting inclined surface block (221) and the bottom plate (201) is equal to the thickness of the extension plate (211);

[0054] Example 3

[0055] like Figure 5-15 shown

[0056] The abutment assembly comprises a connecting rod (230) and an abutment ring (233); the upper side of the connecting rod (230) is slidably connected in the limiting column (203); the lower end of the slide plate (234) is slidably connected to the connecting rod (230); the lower end of the connecting rod (230) is fixedly connected to the abutment ring (233); the abutment ring (233) is located on a side of the connecting rod (230) close to the column head (202);

[0057] The upper end of the connecting rod (230) is provided with a transverse groove (232), the lower end of the slide plate (234) is fixedly connected with a lower slider (235), and the lower slider (235) is slidably connected in the transverse groove (232);

[0058] The transverse groove (232) and the lower sliding block (235) are in a trapezoidal structure;

[0059] A vertical slot (231) is formed on one side of the connecting rod (230), and the inner lower end of the limiting column (203) is fixedly connected to a limiting block (205). The limiting block (205) is slidably connected in the vertical slot (231). The vertical slot (231) is located below the transverse slot (232), and the limiting block (205) is limited by the trapezoidal structure of the transverse slot (232).

[0060] The control assembly comprises a control frame (3), an impeller (301), an internal thread (302) and a screw (303); the control frame (3) is fixedly connected to the injection barrel (2); the screw (303) is rotatably connected to the control frame (3); the impeller (301) is rotatably provided in the middle of the control frame (3); an internal thread (302) is provided in the middle of the impeller (301); the internal thread (302) is threadably connected to the screw (303); and the lower end of the screw (303) is fixedly connected to the fixed plate (304);

[0061] The pitch of the screw (303) is 2 mm, and the circumference of the impeller (301) exposed outside the control frame (3) is half of the overall circumference of the impeller (301).

[0062] In summary, the present invention provides a lateral recess puncture indwelling needle (1). When in use, the indwelling needle (1) is first punctured to the position of the bony landmark. Similar to the prior art, when the indwelling needle (1) needs to be connected to the syringe of the prior art, the column head (202) of the syringe (2) of the present application is connected to the indwelling needle (1). At this time, the connecting rod (230) and the slide (234) slide freely in the square groove (204) of the limiting column (203), so that the abutment ring (233) fits the skin next to the puncture position of the indwelling needle (1); The connection of the needle (1) pushes the pressure ring (210), so that the extension plate (211) passes through the limiting inclined plane block (221) and is limited by the limiting inclined plane block (221) to a position close to the bottom plate (201). After the extension plate (211) approaches the bottom plate (201), it pushes the slide plate (234) to slide by pushing the inclined plane block (223), the connecting rod (226) and the roller (228). The slide plate (234) slides on the connecting rod (230) through the lower slider (235) and is connected to the fixed gear (236) through the sliding gear (236). 305) is engaged and limited. Due to the positioning of the abutment ring (233), the connecting rod (230), the slide plate (234), the fixing plate (304) and the screw (303), the insertion of the indwelling needle (1) is restricted. When the subsequent "absorption and injection of the syringe every 1mm of needle insertion" action is performed, the impeller (301) is moved by the finger. Since only the part of the impeller (301) outside the control frame (3) can be moved, the impeller (301) can only rotate half a circle under single control. Due to the 2mm pitch of the screw (303), the impeller (301) can only rotate half a circle under single control. m, the screw (303) is limited by the fixing plate (304) in the square groove (204) of the limiting column (203), and the screw (303) cannot rotate, and finally the screw (303) moves upward by 1 mm. Under the engagement of the sliding teeth (236) and the fixing teeth (305), the abutment ring (233) moves upward by 1 mm. The operator has only 1 mm of space to push the indwelling needle (1), ensuring the safety of puncture. After the back suction and push injection are no longer subject to resistance, the drug injection is performed through the lateral recess puncture indwelling needle (1).

[0063] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0064] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A lateral recess puncture indwelling needle, characterized by: It includes a matching part, an abutting part and a control part, the matching part includes a syringe and a pushing assembly, a column head is provided on the lower side of the syringe, and the pushing assembly is arranged on the side of the column head of the syringe; an abutting part is provided on the lower side of the syringe, the abutting part includes an abutting assembly and a sliding clamping assembly, and the sliding clamping assembly is slidably connected to the abutting assembly; the syringe is provided with a control part on the upper side of the abutting part, the control part includes a control assembly and a fixed clamping assembly, and the control assembly is connected to the fixed clamping assembly; the sliding clamping assembly and the fixed clamping assembly are matched through the pushing assembly.

2. The lateral recess puncture indwelling needle according to claim 1, characterized in that: The lower side of the injection cylinder is fixedly connected to the base plate, and the column head is fixedly connected to the base plate; the pushing assembly includes a pressure ring, an extension plate, a fixing frame, a pushing inclined plane block, a pushing compression spring, a connecting plate and a connecting rod, the pressure ring is sleeved on the column head, the pressure ring is fixedly connected to the base plate with a fixed compression spring, the base plate is fixedly connected to the fixing frame, the pushing inclined plane block is slidably connected on the fixing frame, the pressure ring is fixedly connected to the extension plate on the side close to the pushing inclined plane block, the pushing inclined plane block is fixedly connected to the pushing compression spring in the fixing frame, the pushing compression spring is fixedly connected to the connecting plate on the side away from the pushing inclined plane block, the connecting rod is slidably connected in the fixing frame, the connecting plate is fixedly connected to the connecting rod, the connecting rod passes through the fixing frame, and the connecting rod is slidably connected to the fixing frame.

3. The lateral recess puncture indwelling needle according to claim 2, characterized in that: The bottom plate is fixedly connected to a limiting column on one side close to the fixing frame, and a square groove is provided in the middle of the limiting column; The sliding clamping assembly includes a slide plate, and the slide plate is fixedly connected with a sliding tooth; The fixed clamping assembly includes a fixed plate, a fixed tooth is fixedly connected to the fixed plate, the sliding tooth is arranged corresponding to the fixed tooth, and the sliding plate and the fixed plate are slidably connected in the square groove; The connecting rod passes through the limiting column, and the connecting rod is slidably connected to the limiting column. One end of the connecting rod is fixedly connected to an inner shaft in the limiting column, and a roller is rotatably connected to the inner shaft. The roller protrudes from the connecting rod on the side away from the connecting plate, and the roller abuts against the slide.

4. The lateral recess puncture indwelling needle according to claim 3, characterized in that: The fixing frame is slidably connected to the limiting inclined surface block when pushing the inclined surface block away from the bottom plate. A limiting compression spring is fixedly connected between the limiting inclined surface block and the fixing frame. The distance between the limiting inclined surface block and the bottom plate is equal to the thickness of the extension plate.

5. The lateral recess puncture indwelling needle according to claim 4, characterized in that: The abutment assembly includes a connecting rod and an abutment ring. The upper side of the connecting rod is slidably connected in the limiting column. The lower end of the slide is slidably connected to the connecting rod. The lower end of the connecting rod is fixedly connected to the abutment ring. The abutment ring is located on the side of the connecting rod close to the column head.

6. The lateral recess puncture indwelling needle according to claim 5, characterized in that: A transverse groove is formed at the upper end of the connecting rod, and a lower slider is fixedly connected to the lower end of the slide plate, and the lower slider is slidably connected in the transverse groove; The transverse groove and the lower sliding block are in a trapezoidal structure; A vertical slot is provided on one side of the connecting rod, and the inner lower end of the limiting column is fixedly connected to a limiting block, and the limiting block is slidably connected in the vertical slot, and the vertical slot is located below the transverse slot.

7. The lateral recess puncture indwelling needle according to claim 6, characterized in that: The control assembly includes a control frame, an impeller, an internal thread and a screw. The control frame is fixedly connected to the injection barrel. The screw is rotatably connected to the control frame. A impeller is rotatably provided in the middle of the control frame. An internal thread is provided in the middle of the impeller. The internal thread is threadably connected to the screw. The lower end of the screw is fixedly connected to the fixed plate.

8. The lateral recess puncture indwelling needle according to claim 7, characterized in that: The pitch of the screw is 2 mm, and the circumference of the impeller exposed outside the control frame is half of the overall circumference of the impeller.

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