CN118452905A - Be used for implantation to pass needle aid for sensor - Google Patents

Abstract

The invention provides a needle aid for implanting a sensor, the needle aid comprising a first state of a locking position and a second state of an implantation position; the needle aid comprises a shell, an anti-triggering mechanism, a limiting disc, a middle barrel, a needle withdrawing bin and a transmitter base which are assembled from top to bottom in sequence; the limiting disc is fixedly connected with the shell; the needle withdrawing bin is arranged in the middle cylinder; the emitter base is movably arranged below the middle cylinder; the middle barrel is also provided with a trigger mechanism, and the trigger mechanism and the trigger preventing mechanism are matched with each other to control the needle aid to finish the conversion between the first state and the second state. The invention realizes the release of the layer structure and finally implants the sensor into the skin of the human body by arranging the multiple buckle structure, has simple structure and high implantation accuracy, improves the experience of users, can be reused, only needs to replace the needle withdrawing bin, avoids injury or infection caused by contact with the guide needle, and ensures smooth needle withdrawing.

Description

Be used for implantation to pass needle aid for sensor

Technical Field

The invention relates to the field of medical instruments, in particular to a needle aid for implanting a sensor.

Background

Implantable biosensors have the advantage of continuously measuring certain important physiological or pathological parameters in the body over time, such as the concentration of oxygen, glucose, lactic acid, etc., to obtain a comprehensive and accurate diagnostic or therapeutic effect. The method is used for continuously monitoring the physiological parameters of the human body, and has important reference significance for diet, health, medication, exercise conditions and the like. In vitro blood glucose self-monitoring is a typical example, but the monitoring effect is greatly reduced because the user needs to continuously prick the finger to obtain discontinuous test values and remember the test values. Continuous blood glucose monitoring utilizes an implanted blood glucose sensor to monitor blood glucose signals, and then data can be sent to receiving equipment through a transmitter, so that all-weather uninterrupted and visual blood glucose monitoring is realized. Likewise physiological parameters such as lactic acid, uric acid and the like can be monitored by the method.

To wear such continuous monitoring devices, it is also necessary to implement them with a needle aid. Generally, the introducer needle is placed over the front end of the sensor, and when the needle assist is activated, the introducer needle is advanced into the implantation site in synchronism with the sensor, and then the introducer needle is quickly withdrawn, leaving the sensor in the subcutaneous tissue. Whether the needle aid can work stably and reliably relates to the success or failure of the sensor implantation and also relates to the experience of a user.

With the increasing penetration of the needle aid, the existing needle aid can accurately and stably implant the sensor and withdraw the needle through the precise matching of the internal mechanism, and provides more comfortable use experience for patients as much as possible, which further increases the price of the needle aid. However, most of the current needle aids, such as blood sugar detection devices, are basically disposable medical appliances for ensuring sanitation and sterility, including the needle aids and emitters inside the needle aids, and the needle aids are discarded after use, so that the use cost is high, a certain economic pressure is brought to patients, and the environment protection is not facilitated.

Disclosure of Invention

The invention provides a needle assisting device for implanting a sensor, which realizes layer-by-layer structure release by arranging a multiple buckle structure and finally implants the sensor into human skin, has simple structure and high implantation accuracy, improves the experience of a user, can be reused, only needs to replace a needle withdrawing bin, avoids damage or infection caused by contacting a guide needle, and ensures that the needle withdrawing is smooth.

In order to solve the problems, the invention adopts the following technical scheme:

A needle aid for implanting a sensor, the needle aid comprising a first state of a locking position and a second state of an implantation position; the needle aid comprises a shell, an anti-triggering mechanism, a limiting disc, a middle barrel, a needle withdrawing bin and a transmitter base which are assembled from top to bottom in sequence; the limiting disc is fixedly connected with the shell and can limit the trigger prevention mechanism; the needle withdrawing bin is arranged in the middle barrel and can clamp a guide needle required by the implantation sensor; the emitter base is movably arranged below the middle cylinder and can drive the needle withdrawing bin and the emitter to move up and down; the middle barrel is also provided with a trigger mechanism, and the trigger mechanism and the trigger preventing mechanism are matched with each other to control the needle aid to finish the conversion between the first state and the second state.

When the needle aid is in a first state, the trigger prevention mechanism plays a role in locking the trigger mechanism, and the needle withdrawing bin and the emitter base are both positioned at one end far away from skin; when the needle aid is in the second state, the trigger mechanism is started to control the emitter base to drive the needle withdrawing bin to move downwards so as to complete implantation of the sensor.

The top of the shell is provided with a locking groove and an unlocking groove which are matched with the trigger prevention mechanism.

The anti-triggering mechanism comprises an anti-triggering knob and an anti-triggering post which are fixedly connected, a locking block matched with the locking groove and the unlocking groove is arranged on the side face of the anti-triggering knob, and an elastic component is sleeved outside the anti-triggering post.

The limiting plate is provided with a limiting plate fixing hole site and an anti-trigger post movement channel, the limiting plate fixing hole site is used for being connected with the shell, and the anti-trigger post movement channel is used for preventing the trigger post from moving.

The middle cylinder comprises a cylinder part positioned above and a cylinder part positioned below, the cylinder part can be used for the needle withdrawing bin to move up and down, the cylinder part is provided with a middle cylinder limiting tongue piece, a transmitting sliding block channel and a transmitting sliding column channel, and the middle cylinder limiting tongue piece can limit the whole middle cylinder.

The needle withdrawing bin comprises a claw-shaped shell and a needle withdrawing bin cover which are movably connected, a needle holder is arranged in a cavity formed by the claw-shaped shell and the needle withdrawing bin cover, an elastic part is sleeved outside the needle holder, and a needle withdrawing bin protrusion used for limiting is further arranged on the outer side of the claw-shaped shell.

The emitter base comprises a base, and an emitter slide block, a claw and an emitter slide column which are arranged on the base, wherein the emitter slide block is used for controlling the emitter base to integrally move, the claw is arranged in the middle cylinder and controls the needle holder to move, and an elastic component is sleeved outside the emitter slide column and can move in the emitter slide column channel.

The jack catch bottom is equipped with spacing ladder, and spacing ladder includes first ladder and second ladder, and when the needle storehouse was located first ladder in the back, when the needle storehouse arch was located first ladder in the back, the needle storehouse was moved back can be removed from the jack catch bottom, and when the needle storehouse arch was located the second ladder in the back, the needle storehouse was fixed in on the jack catch.

The trigger mechanism includes a trigger button and a trigger button mount.

The invention has the following beneficial effects:

1. the needle aid can work stably and reliably, so that the success rate of sensor implantation is ensured, and the experience of a user is improved;

2. The needle aid can be repeatedly used, so that the use cost is reduced, and the environment protection is facilitated;

3. the needle aid can be triggered by only slightly pressing during operation, and secondary rebound is convenient;

4. the needle withdrawing bin can be replaced, so that damage or infection caused by contact with a guide needle is avoided, and smooth needle withdrawing is ensured.

Drawings

FIG. 1 is a schematic diagram of the whole structure of the needle aid provided by the invention;

FIG. 2 is an exploded view of the needle aid of the present invention;

FIG. 3 is a schematic view of the internal structure of the needle aid according to the present invention;

FIG. 4 is a schematic diagram showing an internal structure of the needle aid according to the present invention;

FIG. 5 is a schematic diagram showing the internal structure of the needle aid according to the present invention;

FIG. 6 is a schematic view of a housing according to the present invention;

FIG. 7 is a schematic diagram of an anti-triggering mechanism according to the present invention;

Fig. 8 is a schematic structural view of a limiting disc provided by the invention;

FIG. 9 is a schematic structural view of a middle barrel according to the present invention;

FIG. 10 is a schematic diagram of a trigger mechanism according to the present invention;

FIG. 11 is a schematic view of the structure of the needle retraction cartridge provided by the present invention;

FIG. 12 is a schematic view of a structure of an emitter base according to the present invention;

FIG. 13 is a schematic view of a structure of a transmitting slider provided by the present invention;

FIG. 14 is a schematic diagram of a transmitter according to the present invention;

FIG. 15 is a cross-sectional view of the needle assist device in a first state;

FIG. 16 is a cross-sectional view of the needle assist device in a second state;

fig. 17 is a cross-sectional view of the needle aid at the completion of implantation.

In the figure: 1-anti-triggering mechanism, 101-anti-triggering knob, 102-anti-triggering post and 103-locking block;

2-shell, 201-trigger-preventing clamping position, 202-locking groove, 203-unlocking groove, 204-shell limit rib, 205-shell limit block, 206-shell fixing hole site and 207-trigger button groove;

3-limit plate, 301-limit notch, 302-limit plate fixing hole site, 303-trigger-preventing column movement channel, 3031-upper movement channel, 3032-lower movement channel;

4-a middle cylinder, 401-a cylindrical part, 4011-a needle withdrawing cavity, 4012-a base cavity, 4013-a claw cavity, 402-a cylindrical part, 403-a limit tongue piece, 404-a transmitting slide column channel, 405-a transmitting slide block channel and 406-a triggering clamping position;

5-trigger mechanism, 501-trigger button, 502-trigger button mount;

6-needle withdrawing bin, 601-claw type shell, 6011-needle withdrawing limit hole, 602-needle withdrawing bin cover, 6021-needle withdrawing limit buckle, 603-needle holder, 6031-needle holding claw, 604-needle withdrawing bin bulge and 605-needle withdrawing bin cross;

7-emitter base, 701-base, 7011-elastic fastener, 702-claw, 7021-limit step, 7022-first step, 7023-second step, 703-emitter slide, 7031-limit screw, 704-emitter slide, 7041-slide fastener, 7042-telescopic button; 8-emitter, 801-groove, 9-elastic component, 10-sensor, 11-guide needle, 12-sensor sheath.

Detailed Description

In order to more particularly describe the present invention, the following detailed description of the technical scheme of the present invention is provided with reference to the accompanying drawings and the specific embodiments. These descriptions are merely illustrative of how the present invention may be implemented and are not intended to limit the specific scope of the invention. The scope of the invention is defined in the claims.

As shown in fig. 1 to 5, the present embodiment provides a needle assisting device for implanting a sensor, which includes a housing 2, an anti-triggering mechanism 1, a limiting disc 3, a middle barrel 4, a needle withdrawing bin 6 and a transmitter base 7 assembled from top to bottom in sequence, wherein the housing covers other parts inside, as shown in fig. 6, the top of the housing is in a hollow structure and is provided with an anti-triggering clamping position 201 for placing the anti-triggering mechanism, a locking groove 202 and an unlocking groove 203 are arranged on the side edges of the anti-triggering clamping position, and a housing limiting rib 204 and a housing limiting block 205 are arranged inside the housing; the side of the shell is also provided with a trigger button slot 207 for installing a trigger button, and the top of the shell is also provided with a shell fixing hole site 206;

As shown in fig. 7, the anti-triggering mechanism comprises an anti-triggering knob 101 and an anti-triggering post 102 which are fixedly connected, a locking block 103 which is respectively matched with the locking groove and the unlocking groove is arranged on the side surface of the anti-triggering knob, and the anti-triggering mechanism is positioned in an anti-triggering clamping position;

As shown in fig. 8, the limiting plate includes a limiting notch 301, a limiting plate fixing hole 302 and an anti-trigger post moving channel 303, where the limiting plate fixing hole corresponds to the position of the shell fixing hole, the limiting plate passes through the limiting plate fixing hole and the fixing hole shell through a screw to fix the limiting plate to play a role of limiting in the vertical direction, a gap is provided between the limiting plate and the anti-trigger clamping position for preventing the trigger button from rotating, and the anti-trigger knob can rotate in the gap to realize conversion between the locking slot and the unlocking slot, so as to realize up-down position movement of the anti-trigger post; the middle part of the limiting disc is provided with an anti-trigger column movement channel which is divided into an upper movement channel 3031 with a large aperture and a lower movement channel 3032 with a small aperture, the anti-trigger column extends out of the anti-trigger column movement channel, an elastic part (a spring in the embodiment) is sleeved outside the anti-trigger column in the upper movement channel, and the anti-trigger knob is positioned above the limiting disc, so that the effect of limiting the position of the anti-trigger column is achieved, the side edge of the limiting disc is provided with a limiting notch, the limiting notch corresponds to the position of a shell limiting rib on the side face of the shell, and the limiting notch and the shell limiting rib are matched and fixed to play a role of limiting in the horizontal direction;

As shown in fig. 9, the middle cylinder includes a cylindrical portion 401 located above and a cylindrical portion 402 located below, a limit tongue 403 is disposed on a side edge of the cylindrical portion, and the limit tongue corresponds to a position of a housing limit block, and is matched with the position of the limit tongue to limit the middle cylinder, where the limit tongue is an elastic member (in this embodiment, the limit tongue is a plastic elastic member); the needle withdrawing bin can move up and down in the cylindrical part, and a claw cavity 4013 is arranged at the outer side of the bottom of the base cavity; the top surface of the cylinder part is provided with a transmitting slide column channel 404 (3 transmitting slide column channels are arranged in the embodiment) and a transmitting slide block channel 405 (2 transmitting slide column channels are arranged in the embodiment), the transmitting slide column channels are positioned on two sides of the cylinder part, the transmitting slide column channels are distributed on the top of the cylinder part in a triangular shape, the top of the cylinder part is also provided with a triggering clamping position 406 for installing a triggering mechanism, the triggering clamping position is arranged close to one transmitting slide column channel, and an anti-triggering column passes through the anti-triggering column movement channel to reach the middle cylinder and is positioned between the triggering button and the cylinder part;

As shown in fig. 10, the triggering mechanism includes a triggering button 501 and a triggering button fixing part 502, where the triggering button fixing part is in an open slot structure, and is fixed on the triggering position and passes through a transmitting sliding column channel on the triggering position, the triggering button extends out from the triggering position and is internally provided with an elastic component (in this embodiment, a spring), one end of the triggering button is C-shaped and extends into a cavity formed by the triggering button fixing part and the triggering position, and at the same time, the other end of the triggering button extends out from the triggering position on the casing for external force to press;

As shown in fig. 11, the needle withdrawing bin comprises a claw shell 601, a needle withdrawing bin cover 602, a needle holder 603, a needle withdrawing bin protrusion 604 and a needle withdrawing bin cross 605, wherein a needle withdrawing limit button 6021 is arranged at the bottom of the needle withdrawing bin cover, a claw opening of the claw shell is upward, a needle withdrawing limit hole 6011 matched with the needle withdrawing limit button is arranged at the top of the claw shell, and the needle withdrawing bin cover and the claw shell are connected through the cooperation of the needle withdrawing limit hole and the needle withdrawing limit button; the cavity formed by the needle withdrawing bin cover and the claw shell is internally provided with a needle holder for holding the guide needle, the bottom of the needle holder is provided with an inward needle holding claw 6031, the needle holding claw holds the top of the guide needle, the outer sleeve of the needle holder is provided with an elastic part 9 (a spring in the embodiment), the side edge of the claw shell is also provided with a needle withdrawing bin bulge, and the bottom of the claw shell is provided with a needle withdrawing bin cross;

As shown in fig. 12, the emitter base includes a base 701, a claw 702 located on the base, an emitting slide 703 and an emitting slide 704, elastic members (springs in this embodiment) are sleeved outside the emitting slide, the emitting slide is located in the emitting slide channel of the middle barrel and can move up and down, and the top of the emitting slide is fixed by a limit screw 7031; the clamping jaw is positioned in the base cavity of the middle barrel and is clamped with the needle holder for limiting, the clamping jaw corresponds to the clamping jaw cavity in position, a limiting step 7021 matched with the protrusion of the needle withdrawing bin is arranged at the bottom of the clamping jaw, and the limiting step is divided into a first step 7022 and a second step 7023; when the needle withdrawing bin bulge is positioned on the first step, the needle withdrawing bin can be removed from the bottom of the clamping jaw, and when the needle withdrawing bin bulge is positioned on the second step, the needle withdrawing bin is fixed on the clamping jaw; as shown in fig. 13, the transmitting slide block includes a slide block fixing member 7041 and a telescopic button 7042 located on the slide block fixing member, where the transmitting slide block corresponds to the position of the transmitting slide block channel, when the transmitting slide block moves upward above the transmitting slide block channel, the telescopic button is in an extended state and plays a limiting role, and at this time, the telescopic button is located on the adjacent side of the trigger button, and in the process of moving upward of the transmitting slide block, the transmitter base and the whole body can be driven to move upward; the side of the base is provided with an elastic fastener 7011 for fixing the emitter; as shown in fig. 14, the sensor 10 and the guide needle 11 are fixed in a transmitting position on the transmitter 8, a groove 801 is arranged on the side surface of the transmitter, and the groove and the elastic fastener cooperate to play a role in fixing.

As shown in fig. 15, when the needle aid is in the first state, namely the locking position, the unlocking block on the anti-trigger knob is positioned in the locking groove, the bottom of the anti-trigger post is positioned in the middle of the trigger button, the limiting effect on the trigger button is achieved, the elastic component in the trigger button is in a compressed state at the moment, and the trigger button extends out of the trigger clamping position; the emitter base and the needle withdrawing bin are both positioned at the far end (relative to the skin of a human body), wherein the emitter slide block is positioned at the channel of the emitter slide block, the needle withdrawing bin is positioned at the cylindrical part, the needle withdrawing bin bulge is positioned at the second step, and the claw is positioned in the cavity of the base, so that the claw fixes the needle holder at the moment, and the needle holder clamps the guide needle 11; the elastic fastener is clamped and fixed with the side edge of the emitter;

as shown in fig. 16, when the needle assist device is in the second state, i.e., the implantation position, the emitter base is close to the proximal end, the emitter slider is close to the proximal end, the limit screw touches the top end of the emitter slider channel, the claw reaches the claw cavity, the limitation of the needle holder is released, and the needle withdrawing bin is close to the proximal end.

The operation process of the implantation sensor comprises the following steps:

(1) Taking a needle aid in a locked position, the sectional view of the needle aid is shown in fig. 15, and the sensor sheath 12 is first rotated to remove the guide needle;

(2) Pressing the trigger preventing mechanism 1 until the trigger preventing knob leaves the locking groove on the shell, and then freely rotating the trigger preventing knob by 45 degrees (the rotation angle is consistent with the positions of the locking groove and the unlocking groove, specifically 30-90 degrees, and 45 degrees in the embodiment) so that the trigger preventing knob reaches the unlocking groove, and at the moment, the spring in the limiting disc rebounds and moves the trigger preventing post upwards, namely, the trigger preventing knob leaves the middle part of the trigger button, and the trigger preventing mechanism does not stop the trigger button any more;

(3) The trigger button is pressed forcefully, the protruding structure at the front end of the trigger button is contacted with the telescopic button of the launching slide block, at the moment, when the spring in the telescopic button is compressed to the boundary line of the launching slide block channel, the launching slide block can move proximally from the launching slide block channel under the action of spring force sleeved outside the launching slide column, the launching slide column is further driven to move proximally along the launching slide column channel, the whole emitter base moves proximally and drives the needle withdrawing bin clamped by the clamping jaw and the emitter to move proximally until the limiting screw touches the top end of the launching slide column channel, the emitter is tightly attached to the skin, the clamping jaw reaches the clamping jaw cavity, the limit of the needle holder is relieved, the guide needle falls to implant the sensor into the skin, the implantation operation is completed, at the moment, the whole needle holder is in a second state as shown in fig. 16, at the same time, the needle holder moves distally together with the guide needle under the action of the spring and withdraws to the needle withdrawing bin, and the needle withdrawing is completed, at the moment, the sectional view of the needle holder is shown in fig. 17;

(4) After implantation is completed, pressing the cross of the needle withdrawing bin, rotating the protrusion of the needle withdrawing bin from the second step to the first step, and then taking out the whole needle withdrawing bin from the needle assisting device and discarding the whole needle withdrawing bin;

(5) When the needle is needed to be implanted again, a new needle withdrawing bin is installed, the cross of the needle withdrawing bin is pressed, and the protrusion of the needle withdrawing bin is rotated from the first step to the second step. Then pressing the emitter base to the far end to compress the spring on the emitting slide column, and enabling the emitting slide block to pass through the emitter slide block channel and the telescopic button to be clamped on the middle cylinder, so that the emitter base is fixed, and the reset of the needle aid is completed; then the emitter and the sensor are pressed into the emitter base together, the emitter is clamped by the elastic fastener, and the anti-trigger knob is pressed and rotated anticlockwise by 90 degrees, so that the anti-trigger knob moves from the unlocking groove to the locking groove, the next implantation can be prepared, and the needle aid is in a first state at the moment.

The needle assisting device provided by the invention has the advantages that the structure is simple, the assembly error rate is low, the operation is convenient, the complex steps are not needed, the implantation operation of the sensor is gradually completed through the designs of the buckle, the limit and the like which are arranged in a ring-and-ring manner, the success rate of implantation is ensured, meanwhile, the operation space is reserved for the replacement of the needle withdrawing bin, a user does not need to consume the needle assisting device repeatedly when the user needs to implant again, and only the needle withdrawing bin needs to be replaced, so that the resource is saved.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.

Claims (10)

1. A needle aid for implanting a sensor, the needle aid comprising a first state of a locking position and a second state of an implantation position; the needle aid comprises a shell, an anti-triggering mechanism, a limiting disc, a middle barrel, a needle withdrawing bin and a transmitter base which are assembled from top to bottom in sequence; the limiting disc is fixedly connected with the shell and can limit the trigger prevention mechanism; the needle withdrawing bin is arranged in the middle barrel and can clamp a guide needle required by the implantation sensor; the emitter base is movably arranged below the middle cylinder and can drive the needle withdrawing bin and the emitter to move up and down; the middle barrel is also provided with a trigger mechanism, and the trigger mechanism and the trigger preventing mechanism are matched with each other to control the needle aid to finish the conversion between the first state and the second state.

2. The needle aid of claim 1, wherein the trigger prevention mechanism locks the trigger mechanism when the needle aid is in the first state, the needle retraction cartridge and the emitter base being at an end remote from the skin; when the needle aid is in the second state, the trigger mechanism is started to control the emitter base to drive the needle withdrawing bin to move downwards so as to complete implantation of the sensor.

3. The needle aid according to claim 1, wherein the top of the housing is provided with a locking groove and an unlocking groove matching the anti-triggering mechanism.

4. A needle aid according to claim 3, wherein the trigger preventing mechanism comprises a trigger preventing knob and a trigger preventing post which are fixedly connected, a locking block matched with the locking groove and the unlocking groove is arranged on the side face of the trigger preventing knob, and an elastic part is sleeved outside the trigger preventing post.

5. The needle aid according to claim 4, wherein a limiting disc fixing hole site and an anti-trigger post movement channel are arranged on the limiting disc, the limiting disc fixing hole site is used for being connected with the shell, and the anti-trigger post movement channel is used for preventing the trigger post from moving.

6. The needle aid according to claim 1, wherein the middle barrel comprises a cylindrical part positioned above and a cylindrical part positioned below, the cylindrical part can be used for the needle withdrawing bin to move up and down, the cylindrical part is provided with a middle barrel limiting tongue piece, a transmitting sliding block channel and a transmitting sliding column channel, and the middle barrel limiting tongue piece can limit the whole middle barrel.

7. The needle aid according to claim 6, wherein the needle withdrawing bin comprises a claw-shaped shell and a needle withdrawing bin cover which are movably connected, a needle holder is arranged in a cavity formed by the claw-shaped shell and the needle withdrawing bin cover, an elastic part is sleeved outside the needle holder, and a needle withdrawing bin protrusion for limiting is further arranged on the outer side of the claw-shaped shell.

8. The needle aid according to claim 7, wherein the emitter base comprises a base, and an emitter slider, a claw and an emitter slide column positioned on the base, wherein the emitter slider is used for controlling the emitter base to move integrally, the claw is positioned in the middle barrel and controls the needle holder to move, and the emitter slide column is sleeved with an elastic component and can move in the emitter slide column channel.

9. The needle aid according to claim 8, wherein the bottom of the claw is provided with a limit step, the limit step comprises a first step and a second step, when the needle withdrawing bin is positioned on the first step, the needle withdrawing bin can be removed from the bottom of the claw when the needle withdrawing bin protrusion is positioned on the first step, and when the needle withdrawing bin protrusion is positioned on the second step, the needle withdrawing bin is fixed on the claw.

10. The needle aid of claim 1, wherein the trigger mechanism comprises a trigger button and a trigger button mount.