CN114569836A - Novel perfusion treatment needle - Google Patents

Abstract

The invention relates to the field of medical devices, in particular to a new type of perfusion therapy needle, comprising a puncture needle, the puncture needle comprises a connected needle body and a needle tail seat, the needle body comprises a first hollow cavity, and a cavity wall of the first hollow cavity is provided with a There is a guide structure, and the extension direction of the guide structure is parallel to the axial extension direction of the needle body; it also includes a pressure detection component; it also includes an adjustment mechanism for regulating the reciprocating movement of the pressure detection component along the extension direction of the guide structure; the needle tail seat is provided with There is a connecting piece; the connecting piece is provided with a second hollow cavity, and the second hollow cavity is communicated with the first hollow cavity. The invention adopts a micro pressure sensor, which is arranged inside the needle body, so as to achieve the purpose of measuring the pressure of the perfusion site in the body. At the same time, the position of the pressure sensor can be easily adjusted by the adjustment mechanism, so as to detect the pressure at different positions and grasp more pressure information.

Description

A new type of perfusion therapy needle

technical field

The invention relates to the field of medical devices, in particular to a novel perfusion therapy needle.

Background technique

In many cases, during intracavitary treatment, it is necessary to perfuse the surrounding tissue of the human body with a medicinal solution to protect the surrounding tissue or make the cavity tissue adhere to the treatment device. Fluid perfusion may be required for interventional procedures using radiofrequency and laser catheters. Among them, a typical application is to inject anesthesia and swelling solution into the peripheral tissues of the lower extremity varicose veins in the process of thermal coagulation therapy for lower extremity varicose veins using a radio frequency host and a catheter (hereinafter referred to as varicose vein radio frequency treatment system). On the one hand, under the pressure of anesthesia and swelling liquid, the diseased blood vessel wall is made close to the radiofrequency catheter, and the blood in the blood vessel is discharged to ensure the efficient transfer of heat, thereby ensuring the effectiveness of the treatment. At the same time, the anesthetic swelling solution can isolate the treatment site and surrounding normal tissues, and play a role in protecting normal tissues. Furthermore, the anesthesia tumescent solution can also play an anesthetic effect and improve the patient's feeling.

At present, the varicose vein radiofrequency treatment system does not detect the pressure of the blood vessel on the radiofrequency catheter, and the drug infusion system does not detect the pressure near the puncture device in the body. In this way, the shorthand recording and dosage of drug perfusion are mostly determined by the surgeon's own experience. Then, there may be problems of too fast rate, too much or too little dose, especially for those who have just come into contact with related surgical techniques.

SUMMARY OF THE INVENTION

In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a new type of perfusion therapy needle. The therapy needle includes an in-vivo pressure detection component, which can dynamically detect the in-vivo pressure during the perfusion process and feed it back to the external device as a reference for the perfusion effect. , to guide drug perfusion, thereby solving the problems in the prior art.

In order to achieve the above object and other related objects, the present invention provides a novel perfusion therapy needle, including a puncture needle, the puncture needle includes a needle body and a needle tail seat that are connected, the needle body includes a first hollow cavity, the first hollow cavity is A guide structure is provided on the cavity wall of a hollow cavity, and the extension direction of the guide structure is parallel to the axial extension direction of the needle body; it also includes a pressure detection component; it also includes a guide structure for regulating the pressure detection component along the guide structure. An adjustment mechanism for reciprocating movement in the extension direction of the needle tail seat; a connecting piece is arranged on the needle tail seat; a second hollow cavity is arranged in the connecting piece, and the second hollow cavity is communicated with the first hollow cavity.

In some embodiments of the present invention, the pressure detection assembly includes a connected pressure detection device and a signal transmission shaft, the pressure detection device is provided in the first hollow cavity, and the pressure detection device is close to the needle body The needle tip; the signal transmission shaft is connected with the adjustment mechanism.

In some embodiments of the present invention, the adjustment mechanism is a compound adjustment mechanism.

In some embodiments of the present invention, the compound adjustment mechanism includes a connected drive assembly and a transmission assembly, and one end of the transmission assembly away from the drive assembly is connected with the signal transmission shaft; the drive assembly can drive the transmission assembly to drive the pressure detection device And the signal transmission shaft reciprocates along the axial extension direction of the guide structure.

In some embodiments of the present invention, the composite adjustment mechanism further includes a handle housing, the handle housing includes an upper handle housing and a lower handle housing; the upper handle housing and the lower handle housing are respectively connected to the needle tail seat.

In some embodiments of the present invention, the drive assembly includes a drive part and an adjustment handle sleeved on the drive part; the drive part is connected to the transmission assembly.

In some embodiments of the present invention, the transmission assembly includes a first transmission part, the first transmission part includes a driving gear shaft, and the extension direction of the driving gear shaft is parallel to the axial extension direction of the signal transmission shaft ; the drive part is sleeved on the drive gear shaft, and the drive gear shaft is also provided with a position drive gear and a drive drive gear; also includes a first driven gear, the first driven gear and the drive drive Gear meshing transmission; preferably, the first driven gear and the driving driving gear are bevel gears.

In some embodiments of the present invention, the transmission assembly includes a second transmission part connected with the first transmission part; the second transmission part includes a first roller, and the first roller and the first driven gear are coaxial connection; further comprising a second roller, one end of the signal transmission shaft away from the puncture needle is arranged between the first roller and the second roller;

Or, the second transmission part includes a second driven gear, and the second driven gear is coaxially connected to the first driven gear; it also includes a rack meshing with the second driven gear; The extension direction is parallel to the extension direction of the signal transmission shaft; the rack is connected with the signal transmission shaft through a connecting rod.

In some embodiments of the present invention, the first roller and the first driven gear are arranged on a driven gear shaft, and the driven gear shaft is mounted on the lower handle shell; the second roller is arranged on the roller shaft, so The roller shaft is arranged on the handle upper shell; the extension direction of the driven gear shaft is parallel to the extension direction of the roller shaft;

Or; it also includes a second guide seat, the extension direction of the second guide seat is parallel to the axial extension direction of the signal transmission shaft; the rack and the second guide seat are respectively provided with matching guide grooves and the guide column; the rack can move back and forth along the second guide seat.

In some embodiments of the present invention, a position detection device and a position driven gear meshed with the position driving gear are also included; the position detection device is connected with the position driven gear; it also includes a joint; the position detection device and the joint electrical connection.

In some embodiments of the present invention, a seal is provided between the needle seat and the handle housing.

In some embodiments of the present invention, a joint is further included, and the signal transmission shaft is electrically connected with the joint.

In some embodiments of the present invention, the handle housing and the adjustment handle are matched with a first limit structure, and the first limit structure includes a limit post and a limit piece to match the limit for the adjustment handle. bit.

In some embodiments of the present invention, scale marks are provided on the adjustment handle.

As mentioned above, a novel perfusion therapy needle of the present invention has the following beneficial effects:

The invention adopts a micro pressure sensor, which is arranged inside the needle body, so as to achieve the purpose of measuring the pressure of the perfusion site in the body. At the same time, the position of the sensor can be easily adjusted by adjusting the handle, so as to detect the pressure at different positions and grasp more pressure information. In addition, the invention can realize the intelligentization of the rate and dose of medicinal liquid perfusion, avoid large errors in perfusion rate and dosage due to insufficient experience of the operator, and promote the standardization of medicinal liquid perfusion during intracavitary clinical operations. In addition to being used for perfusion, the invention can also be used as an injection needle for other occasions where pressure detection is required.

Description of drawings

FIG. 1 shows a front view of the perfusion therapy needle according to the first embodiment of the present invention.

Figure 2 shows an axonometric view of the perfusion therapy needle according to the first embodiment of the present invention.

FIG. 3 shows a partial axonometric view of the perfusion therapy needle according to the first embodiment of the present invention (with the handle upper cover and the adjustment wheel removed).

FIG. 4 is a cutaway view of the adjustment wheel of the perfusion therapy needle according to the first embodiment of the present invention.

FIG. 5 shows an axial cross-sectional view of the perfusion therapy needle according to the first embodiment of the present invention.

FIG. 6 shows an axial cross-sectional view of the perfusion therapy needle according to the first embodiment of the present invention.

FIG. 7 is an axial cross-sectional view of the perfusion therapy needle according to the first embodiment of the present invention (the pressure detection device is at the front end).

FIG. 8 is a cross-sectional view of a surface α of the perfusion therapy needle according to the first embodiment of the present invention (the pressure detection device is at the front end).

FIG. 9 shows an axial cross-sectional view of the perfusion therapy needle according to the first embodiment of the present invention (the pressure detection device is at a certain position in the middle).

10 is a cross-sectional view of the α plane of the perfusion therapy needle according to the first embodiment of the present invention (the pressure detection device is at a certain position in the middle).

FIG. 11 is an axial cross-sectional view of the perfusion therapy needle according to the first embodiment of the present invention (the pressure detection device is at the rear end).

FIG. 12 is a cross-sectional view of the α plane of the perfusion therapy needle according to the first embodiment of the present invention (the pressure detection device is at the rear end).

Fig. 13 shows a partial axonometric view of the perfusion therapy needle according to the second embodiment of the present invention (viewed from the front of the rack, with the handle upper cover and the adjustment wheel removed).

Fig. 14 shows a partial axonometric view of the perfusion therapy needle according to the second embodiment of the present invention (viewed from the rear side of the rack, with the handle upper cover and the adjustment wheel removed).

Fig. 15 is a partial view (viewed from the upper end face of the rack) of the perfusion therapy needle according to the second embodiment of the present invention

Fig. 16 shows an axial cross-sectional view of the perfusion therapy needle according to the second embodiment of the present invention.

FIG. 17 shows a partial cross-sectional view of the perfusion therapy needle according to the second embodiment of the present invention.

Fig. 18 is an axial cross-sectional view of the perfusion therapy needle according to the second embodiment of the present invention (the pressure detection device is at the front end).

FIG. 19 shows an axial cross-sectional view of the perfusion therapy needle according to the second embodiment of the present invention (the pressure detection device is at a certain position in the middle).

Fig. 20 shows an axial cross-sectional view of the perfusion therapy needle according to the second embodiment of the present invention (the pressure detection device is at the rear end).

Component label description

10 puncture needles

11 pin body

111 First hollow cavity

12-pin tailstock

121 Second hollow cavity

122 Connectors

13 Pressure detection components

131 Pressure detection device

132 Signal transmission axis

14 Guide structure

20 scale marks

30 Compound Adjustment Mechanism

31 Drive components

311 Adjustment handle

312 Drive

32 Transmission components

321 The first transmission part

3211 pinion shaft

3212 Position pinion gear

3213 Drive pinion gear

3214 First driven gear

322 Second transmission part

3221 First Roller

3222 Second Roller

3223 driven gear shaft

3224 Roller shaft

3225 Second driven gear

3226 Rack

3227 connecting rod

3228 Second guide seat

3229 Guide post

33 Handle upper shell

34 Handle lower case

35 Position detection device

36 position driven gear

37 The first limit structure

371 Limit post

372 limit piece

381 First cable

382 Second cable

391 Second limit structure

392 The third limit structure

40 connectors

50 Seals

Detailed ways

The embodiments of the present invention are described below by specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

See Figures 1 through 20. It should be noted that the structures, proportions, sizes, etc. shown in the drawings in this specification are only used to cooperate with the contents disclosed in the specification, so as to be understood and read by those who are familiar with the technology, and are not used to limit the implementation of the present invention. Restricted conditions, it does not have technical substantive significance, any structural modification, proportional relationship change or size adjustment, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the present invention. The disclosed technical content must be within the scope of coverage. At the same time, the terms such as "up", "down", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and clarity, and are not used to limit this specification. The implementable scope of the invention, and the change or adjustment of the relative relationship thereof, shall also be regarded as the implementable scope of the present invention without substantially changing the technical content.

Referring to FIGS. 1 to 20 , an embodiment of the present invention provides a novel perfusion therapy needle, including a puncture needle 10 . The puncture needle 10 includes a connected needle body 11 and a needle tail seat 12 , and the needle body 11 includes a first hollow A cavity 111, a guide structure 14 is provided on the cavity wall of the first hollow cavity 111, and the extension direction of the guide structure 14 is parallel to the axial extension direction of the needle body 11; also includes a pressure detection assembly 13; also includes An adjustment mechanism for regulating the reciprocating movement of the pressure detection assembly 13 along the extending direction of the guide structure 14; as shown in FIG. 5, the needle tail seat 12 is provided with a connecting piece 122; cavity 121 , the second hollow cavity 121 communicates with the first hollow cavity 111 . In the present invention, when the puncture needle 10 is punctured into the patient's body, the perfusion fluid is perfused into the patient's body through the first hollow cavity 111 through the second hollow cavity 121 of the connector 122, and the pressure detection assembly 13 is arranged inside the needle body 11, so that Achieving timely measurement of the pressure at the perfusion site in vivo. At the same time, by regulating the movement of the pressure detection component 13 along the extending direction of the guide structure 14 by the adjustment mechanism, the position of the pressure detection component 13 can be adjusted, so as to detect the pressure at different positions and obtain more pressure information. The device and principle of the present invention can also be used in other situations where position adjustment is required.

In the novel perfusion therapy needle provided by the embodiment of the present invention, referring to FIG. 1 and FIG. 16 , the pressure detection assembly 13 includes a connected pressure detection device 131 and a signal transmission shaft 132, and the pressure detection device 131 is provided in the first In a hollow cavity 111, the pressure detection device 131 is close to the needle tip of the needle body 11; the signal transmission shaft 132 is connected with the adjustment mechanism. When the puncture needle 10 is punctured into the patient's body for perfusion, the adjustment mechanism can regulate the signal transmission shaft 132 and drive the pressure detection device 131 to reciprocate along the guide structure 14, so that the pressure detection device 131 can timely monitor the actual pressure at different positions in the body, and the signal The transmission shaft 132 can transmit the detected pressure information to the external active device through the joint 40 . In some specific embodiments, the pressure detection device 131 can be, for example, a miniature pressure sensor. The pressure sensor can adopt the existing technology, for example, it can be the FOP series optical fiber pressure sensor of FISO company.

In the novel perfusion therapy needle provided by the embodiment of the present invention, the adjustment mechanism is a compound adjustment mechanism 30 . The following is explained by two embodiments.

As shown in FIGS. 1 to 20 , in the novel perfusion therapy needle provided by the embodiment of the present invention, as shown in FIGS. 6 and 17 , the compound adjustment mechanism 30 includes a connected drive assembly 31 and a transmission assembly 32 , and the transmission assembly 32 is far away from the One end of the drive assembly 31 is connected to the signal transmission shaft 132 ; the drive assembly 31 can drive the transmission assembly 32 to drive the pressure detection device 131 and the signal transmission shaft 132 to reciprocate along the axial extension direction of the guide structure 14 . The compound adjustment mechanism 30 is divided into a gear+roller adjustment mechanism and a gear+rack adjustment mechanism. Among them, the gear+roller adjustment structure is described as the first embodiment. A gear+rack adjustment mechanism is described as a second embodiment.

In the first embodiment of the present invention, as shown in FIGS. 1 to 12 , the puncture needle 10 , the needle body 11 , the needle tail seat 12 , the first hollow cavity 111 , the guide structure 14 , the pressure detection assembly 13 (the pressure detection device 131 ) The descriptions of the signal transmission shaft 132), the connecting member 122, and the second hollow cavity 121 are the same as before, and the similarities will not be repeated. The compound adjustment mechanism 30 is a gear+roller adjustment structure.

In the first embodiment, as shown in FIG. 6 , the drive assembly 31 includes a drive part 312 and an adjustment handle 311 sleeved on the drive part 312 ; the drive part 312 is connected with the transmission assembly 32 . Rotating the adjusting handle 311 can drive the driving part 312 to rotate. The adjusting handle 311 is an adjusting wheel, and the driving part 312 can be, for example, a spline structure.

Further, as shown in FIGS. 3 and 6 , the transmission assembly 32 includes a first transmission part 321 , the first transmission part 321 includes a driving gear shaft 3211 , and the extension direction of the driving gear shaft 3211 is related to the signal transmission shaft The axial extension direction of 132 is parallel; the driving part 312 is sleeved on the driving gear shaft 3211, and the driving gear shaft 3211 is also provided with a position driving gear 3212 and a driving driving gear 3213; also includes a first driven gear Gear 3214, the first driven gear 3214 meshes with the driving driving gear 3213 for transmission. Preferably, the first driven gear 3214 and the driving driving gear 3213 are bevel gears. The position driving gear 3212 and the driving driving gear 3213 are driven by the driving part 312 to rotate along the axial direction of the driving gear shaft 3211, and further drive the first driven gear 3214 to rotate.

Further, as shown in FIGS. 3 and 6 , the transmission assembly 32 further includes a second transmission part 322 connected with the first transmission part 321 ; the second transmission part 322 includes a first roller 3221 , and the first roller 3221 It is coaxially connected with the first driven gear 3214; it also includes a second roller 3222, and the end of the signal transmission shaft 132 away from the puncture needle 10 is arranged between the first roller 3221 and the second roller 3222. The axial direction in which the first roller 3221 and the first driven gear 3214 are coaxially connected is perpendicular to the extending direction of the driving gear shaft 3211 . The rotation direction of the second roller 3222 is opposite to the rotation direction of the first roller 3221, thereby driving the signal transmission shaft 132 between the first roller 3221 and the second roller 3222 to reciprocate, thereby driving the signal transmission shaft 132 and the pressure detection device 131 along the The axial extension direction of the guide structure 14 reciprocates.

Preferably, as shown in FIG. 3 , the first roller 3221 is arranged above the first driven gear 3214 .

Further, as shown in FIG. 4 , the compound adjustment mechanism 30 (gear+roller adjustment structure) also includes a handle housing, and the handle housing includes a handle upper case 33 and a handle lower case 34; the handle upper case 33 and the handle lower case 34 are respectively connected with the needle tail seat 12 . The adjustment handle 311 can be rotated relative to the handle upper shell 33 and the handle lower shell 34 . As shown in FIG. 5 , the first roller 3221 and the first driven gear 3214 are arranged on the driven gear shaft 3223 , and the driven gear shaft 3223 is installed on the lower handle shell 34 . As shown in FIG. 3 , the second roller 3222 is disposed on the roller shaft 3224 . The roller shaft 3224 is arranged on the handle upper shell 33 . The extension directions of the roller shaft 3224 and the driven gear shaft 3223 are parallel.

Further, as shown in FIG. 4 and FIG. 5 , a joint 40 is also included. The signal transmission shaft 132 is electrically connected to the connector 40 . Specifically, as shown in FIGS. 6 and 7 , one end of the signal transmission shaft 132 away from the puncture needle 10 connects the signal transmission shaft 132 with the connector 40 through the first cable 381 . Thus, the pressure information collected by the pressure detection device 131 is transmitted to an external active device.

Further, as shown in FIGS. 5 and 6 , sealing members 50 are respectively provided between the needle tail seat 12 and the handle housing. The sealing member 50 may be, for example, a sealing gasket, through which the upper handle shell 33 , the lower handle shell 34 and the needle tail seat 12 are more tightly sealed.

Further, as shown in FIG. 3 and FIG. 6 , a position detection device 35 and a position driven gear 36 meshing with the position driving gear 3212 are also included; the position driving gear 3212 will drive the position driven gear 36 to rotate, and the position detection device 35 Connected to the position driven gear 36 . The position detection device 35 is electrically connected to the connector 40 . The position detection device 35 may be, for example, a rotary sensor, and the position driven gear 36 is mounted on the rotation shaft of the rotary sensor. The rotary sensor is connected to the joint 40 through the second cable 382, thereby transmitting the axial position information of the rotary sensor to an external active device.

Optionally, as shown in FIGS. 1 and 2 , the adjustment handle 311 is provided with a scale mark 20 for reflecting the axial position of the pressure detection device 131 .

Further, as shown in FIG. 4 , the handle housing and the adjusting handle 311 are matched with a first limiting structure 37 , and the first limiting structure 37 includes a limiting column 371 and a limiting piece 372 . In one embodiment, the limiting post 371 is provided on the handle upper shell 33 , the limiting piece 372 is provided on the adjusting handle 311 , and the limiting post 371 and the limiting piece 372 cooperate to adjust the position of the handle 311 . limit.

Optionally, as shown in FIG. 3 , a second limiting structure 391 is provided between the roller shaft 3224 and the handle upper shell 33 , and the second limiting structure 391 may be, for example, a circlip or the like.

Optionally, as shown in FIG. 3 , a third limiting structure 392 is provided between the position driving gear 3212 and the handle upper shell 33 , and the third limiting structure 392 may be, for example, a circlip or the like.

The working principle of the first embodiment of the present invention:

As shown in FIGS. 7-12 , when the adjusting handle 311 is rotated, the driving gear shaft 3211 rotates along with it, and drives the first roller 3221 to rotate by driving the driving gear 3213 and the first driven gear 3214, and further passes the first roller 3221 and the second roller 3221. The roller 3222 drives the signal transmission shaft 132 to move, and further drives the pressure detection device 131 to move back and forth. The rotation angle of the adjustment handle 311 (eg, adjustment wheel) and the driving gear shaft 3211 can be transmitted to the position detection device 35 through the position driving gear 3212 and the position driven gear 36 . The pressure information and the position information are respectively transmitted to the joint 40 through the first cable 381 and the second cable 382 , and are transmitted to the external active device through the joint 40 .

13 to 20, in the second embodiment of the present invention, the puncture needle 10, the needle body 11, the needle tail seat 12, the first hollow cavity 111, the guide structure 14, the pressure detection assembly 13 (the pressure detection device 131 The descriptions of the signal transmission shaft 132), the connecting member 122, and the second hollow cavity 121 are the same as before, and the similarities will not be repeated. The compound adjustment mechanism 30 is a gear+rack adjustment structure.

In the second embodiment, as shown in FIG. 17 , the drive assembly 31 includes a drive part 312 and an adjustment handle 311 sleeved on the drive part 312 ; the drive part 312 is connected with the transmission assembly 32 . Rotating the adjusting handle 311 can drive the driving part 312 to rotate. The adjusting handle 311 is an adjusting wheel, and the driving part 312 can be, for example, a spline structure.

Further, as shown in FIG. 17 , the transmission assembly 32 includes a first transmission part 321 , the first transmission part 321 includes a driving gear shaft 3211 , and the extension direction of the driving gear shaft 3211 is the same as the axis of the signal transmission shaft 132 . parallel to the extending direction; the driving part 312 is sleeved on the driving gear shaft 3211, and the driving gear shaft 3211 is also provided with a position driving gear 3212 and a driving driving gear 3213; it also includes a first driven gear 3214, The first driven gear 3214 meshes with the driving driving gear 3213 for transmission; the first driven gear 3214 and the driving driving gear 3213 are bevel gears. The position driving gear 3212 and the driving driving gear 3213 are driven by the driving part 312 to rotate along the axial direction of the driving gear shaft 3211, and further drive the first driven gear 3214 to rotate.

Further, as shown in FIG. 17 , the transmission assembly 32 includes a second transmission part 322 connected with the first transmission part 321 . The second transmission part 322 further includes a second driven gear 3225, as shown in FIG. 14, the second driven gear 3225 is coaxially connected with the first driven gear 3214; Rack 3226. The extending direction of the rack 3226 is parallel to the extending direction of the signal transmission shaft 132 . The rack 3226 is connected to the signal transmission shaft 132 through a connecting rod 3227 . The rack 3226 meshes with the second driven gear 3225, so that the rack 3226 can move a certain distance in its extension direction. Since the signal transmission shaft 132 and the extension direction of the rack 3226 are parallel and connected by the connecting rod 3227, therefore, The signal transmission shaft 132 can be driven to move along its axial direction.

Preferably, as shown in FIG. 14 , the second driven gear 3225 is disposed above the first driven gear 3214 .

Further, as shown in FIG. 15 , a second guide seat 3228 is further included, and the extension direction of the second guide seat 3228 is parallel to the axial extension direction of the signal transmission shaft 132 ; the rack 3226 and the second guide The seat 3228 is respectively provided with a guide groove and a guide column 3229 ; the rack 3226 can be ensured to move in the guide groove, and the rack 3226 can move back and forth along the second guide seat 3228 .

Further, as shown in FIG. 17 , the compound adjustment mechanism 30 (gear+rack adjustment structure) also includes a handle casing, and the handle casing is symmetrically provided with a handle upper casing 33 and a handle lower casing 34; the handle upper casing 33 and the handle The lower housings 34 are respectively connected to the needle tail holders 12 . The adjustment handle 311 can be rotated relative to the handle upper shell 33 and the handle lower shell 34 . As shown in FIG. 16 , the first driven gear 3224 and the second driven gear 3225 are provided on the driven gear shaft 3223 , and the driven gear shaft 3223 is mounted on the handle lower case 34 . As shown in FIG. 15 , the second guide base 3228 is mounted on the handle upper shell 33 .

Further, as shown in FIG. 16 , a connector 40 is also included, and the signal transmission shaft 132 is electrically connected to the connector 40 . Specifically, as shown in FIG. 17 , one end of the signal transmission shaft 132 away from the puncture needle 10 is connected to the connector 40 through the first cable 381 . Thus, the pressure information collected by the pressure detection device 131 is transmitted to an external active device.

Further, as shown in FIGS. 16 and 17 , a sealing member 50 is provided between the needle tail seat 12 and the handle housing. The sealing member 50 may be, for example, a sealing gasket, through which the upper handle shell 33 , the lower handle shell 34 and the needle tail seat 12 are more tightly sealed.

Further, as shown in FIG. 17, it also includes a position detection device 35 and a position driven gear 36 meshing with the position driving gear 3212; the driving gear will drive the position driven gear 36 to rotate, and the position detection device 35 and the position driven gear 36 connections. The position detection device 35 is electrically connected to the connector 40 . The position detection device 35 may be, for example, a rotary sensor, and the position driven gear 36 is mounted on the rotation shaft of the rotary sensor. The rotary sensor is connected to the joint 40 through the second cable 382, thereby transmitting the axial position information of the rotary sensor to an external active device.

Optionally, as shown in FIGS. 13 and 14 , the adjustment handle 311 is provided with a scale mark 20 for reflecting the axial position of the pressure detection device 131 .

Further, as shown in FIG. 16 , the handle housing and the adjustment handle 311 are matched with a first limiting structure 37 , and the first limiting structure 37 includes a limiting column 371 and a limiting piece 372 . In one embodiment, the limiting post 371 is provided on the handle upper shell 33 , and the limiting piece 372 is provided on the adjusting handle 311 . The limit post 371 and the limit piece 372 cooperate to adjust the limit of the handle 311 .

Optionally, as shown in FIG. 16 , a third limiting structure 392 is provided between the position driving gear 3212 and the handle upper shell 33 , and the third limiting structure 392 may be, for example, a circlip or the like.

The working principle of the second embodiment of the present invention:

18, 19, and 20, when the adjusting handle 311 is rotated, the driving gear shaft 3211 rotates, and drives the second driven gear 3225 to rotate by driving the driving gear 3213 and the first driven gear 3224, and further passes the second driven gear 3225. The driven gear 3225 and the rack 3226 drive the drive signal transmission shaft 132 to move, and further drive the pressure detection device 131 to move back and forth. The rotation angle of the adjustment handle 311 (eg, adjustment wheel) and the driving gear shaft 3211 can be transmitted to the position detection device 35 through the position driving gear 3212 and the position driven gear 36 . The pressure information and the position information are respectively transmitted to the joint 40 through the first cable 381 and the second cable 382 , and are transmitted to the external active device through the joint 40 .

In summary, since the current dose, rate and pressure value of perfusion depend on the experience of the surgeon, it is possible that the rate is too fast, the dose is too much or too little, or the pressure value of the catheter treatment segment is not enough. The problem. To achieve proficient and accurate perfusion treatment, doctors need a long time to learn, and the standardization and standardization of treatment are also difficult to achieve. The present invention can timely monitor the actual pressure in the body, and use the actual pressure value as a reference for guiding perfusion, which is beneficial to solve the above problems, shorten the learning curve of doctors, and promote the standardization and standardization of treatment.

The invention can realize the intelligentization of the rate and dosage of the liquid medicine perfusion, avoid large errors in the perfusion rate and dosage due to the lack of experience of the operator, and promote the standardization of the liquid medicine perfusion in the intracavitary clinical operation. In addition to being used for perfusion, the invention can also be used as an injection needle for other occasions where pressure detection is required.

To sum up, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

The above-mentioned embodiments merely illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can make modifications or changes to the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed in the present invention should still be covered by the claims of the present invention.

Claims (10)

1. A novel perfusion therapy needle, characterized by comprising a puncture needle (10), the puncture needle (10) comprising a connected needle body (11) and a needle tail seat (12), the needle body (11) It comprises a first hollow cavity (111), a guide structure (14) is provided on the cavity wall of the first hollow cavity (111), and the extension direction of the guide structure (14) is related to the axis of the needle body (11). parallel to the extension direction; further comprising a pressure detection assembly (13); further comprising an adjustment mechanism for regulating the reciprocating movement of the pressure detection assembly (13) along the extension direction of the guide structure (14); the needle tail seat (12) A connecting piece (122) is arranged thereon; a second hollow cavity (121) is arranged in the connecting piece (122), and the second hollow cavity (121) communicates with the first hollow cavity (111). 2. The novel perfusion therapy needle according to claim 1, wherein the pressure detection assembly (13) comprises a connected pressure detection device (131) and a signal transmission shaft (132), the pressure detection device (131) ) is arranged in the first hollow cavity (111), the pressure detection device (131) is close to the needle tip of the needle body (11); the signal transmission shaft (132) is connected with the adjustment mechanism. 3. The novel perfusion therapy needle according to claim 1 or 2, wherein the adjustment mechanism is a compound adjustment mechanism (30). 4. The novel perfusion therapy needle according to claim 3, wherein the compound adjustment mechanism (30) comprises a connected drive assembly (31) and a transmission assembly (32), the transmission assembly (32) being remote from the drive One end of the assembly (31) is connected with the signal transmission shaft (132); the drive assembly (31) can drive the transmission assembly (32) to drive the pressure detection device (131) and the signal transmission shaft (132) along the guide structure (14) The axial extension direction reciprocates. 5. The novel perfusion therapy needle according to claim 4, wherein the composite adjustment mechanism (30) further comprises a handle housing; the handle housing comprises an upper handle housing (33) and a lower handle housing (34) ); the handle upper shell (33) and the handle lower shell (34) are respectively connected with the needle tail seat (12); And/or, the drive assembly (31) includes a drive part (312) and an adjustment handle (311) sleeved on the drive part (312); the drive part (312) is connected with the transmission assembly (32). 6. The novel perfusion therapy needle according to claim 5, wherein the transmission assembly (32) comprises a first transmission part (321), and the first transmission part (321) comprises a driving gear shaft (3211) , the extension direction of the driving gear shaft (3211) is parallel to the axial extension direction of the signal transmission shaft (132); the driving part (312) is sleeved on the driving gear shaft (3211), the The driving gear shaft (3211) is also provided with a position driving gear (3212) and a driving driving gear (3213); it also includes a first driven gear (3214), which is connected to the driving driving gear (3214). 3213) meshing transmission; preferably, the first driven gear (3214) and the driving driving gear (3213) are bevel gears. 7. The novel perfusion therapy needle according to claim 6, wherein the transmission assembly (32) comprises a second transmission part (322) connected with the first transmission part (321); the second transmission part (322) comprises a first roller (3221), the first roller (3221) and the first driven gear (3214) are coaxially connected; and a second roller (3222), the signal transmission shaft (132) is away from One end of the puncture needle (10) is arranged between the first roller (3221) and the second roller (3222); or; The second transmission part (322) includes a second driven gear (3225), the second driven gear (3225) is coaxially connected with the first driven gear (3214); and also includes a second driven gear (3214) (3225) a meshing rack (3226); the extension direction of the rack (3226) is parallel to the extension direction of the signal transmission shaft (132); the rack (3226) is connected to the signal through a connecting rod (3227) The transmission shaft (132) is connected. 8. The novel perfusion therapy needle according to claim 7, wherein the first roller (3221) and the first driven gear (3214) are arranged on the driven gear shaft (3223), and the driven gear shaft (3223) is installed on the lower handle shell (34); The second roller (3222) is arranged on the roller shaft (3224), and the roller shaft (3224) is arranged on the handle upper shell (33); The extension direction of the driven gear shaft (3223) is parallel to the extension direction of the roller shaft (3224); Or; further comprising a second guide seat (3228), the extension direction of the second guide seat (3228) is parallel to the axial extension direction of the signal transmission shaft (132); the rack (3226) is parallel to the The second guide seat (3228) is respectively provided with a matching guide groove and a guide column (3229); the rack (3226) can move back and forth along the second guide seat (3228). 9. The novel perfusion therapy needle according to claim 6, further comprising a position detection device (35) and a position driven gear (36) meshing with the position driving gear (3212); the position detection device (35) is connected with the position driven gear (36); also includes a joint (40); the position detection device (35) is electrically connected with the joint (40). 10. The novel perfusion therapy needle according to claim 5, wherein a sealing member (50) is provided between the needle tail seat (12) and the handle housing; And/or, further comprising a joint (40), the signal transmission shaft (132) is electrically connected with the joint (40); And/or, the handle housing and the adjusting handle (311) are matched with a first limiting structure (37); And/or, a scale mark (20) is provided on the adjustment handle (311).

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