CN219022865U - Length-adjustable deep venous catheter - Google Patents

Abstract

The utility model discloses a length-adjustable deep vein catheter, which comprises an outer catheter and an inner catheter, wherein the head end of the inner catheter is embedded into the tail end of the outer catheter, the inner catheter is in sliding connection with the outer catheter, the head end of the inner catheter is in a horn shape, the outer edge of the head end of the inner catheter is contacted with the inner wall of the outer catheter, and the tail injection end of the inner catheter is positioned outside the outer catheter. The length of the deep vein catheter can be adjusted, the deep vein catheter can be suitable for patients with different illness states, and even if the puncture position is not good, the head end of the deep vein catheter can deeply puncture by adjusting the length of the deep vein catheter to reach the optimal position, so that corresponding requirements are met, the indwelling catheter does not need to be punctured again, the workload of medical staff is saved, and the pain of the patient is reduced.

Description

Length-adjustable deep venous catheter

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a length-adjustable deep intravenous catheter.

Background

The deep vein catheterization is a catheter which is placed in the deep vein (femoral vein, subclavian vein, internal jugular vein) cavity by means of skin puncture with a special puncture tube, can be provided with specifications of single cavity, double cavity or three cavities, etc., and can be used for inputting hypertonic liquid and high nutrient solution (total intestinal parenteral nutrition) and measuring central venous pressure. Is suitable for: 1. monitoring hemodynamic changes (measuring central venous pressure); 2. critical patients with severe trauma, fluid resuscitation for various types of shock, and acute circulatory failure; 3. postoperative monitoring in various major surgery, especially cardiovascular, craniocerebral and abdominal major surgery; 4. patients who need to be infused for a long period of time or receive complete parenteral nutrition; 5. a large number of patients with rapid transfusion and fluid infusion need to be accepted; 6. patients with difficult peripheral venous catheterization; 7. hemodialysis patients.

However, the length of the current deep vein catheter is fixed, because the incidence rate of the displacement of the deep vein catheter (also called a central vein catheter) is high, and the optimal position is easy to change according to different stages of the illness state, and because the length is insufficient, the head end of the catheter cannot continuously penetrate deeply to reach the appointed optimal position, and the corresponding function cannot be realized, at the moment, the head end position of the indwelling catheter needs to be adjusted by re-penetrating, so that the workload of medical staff is increased, and meanwhile, the pain of a patient is increased.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model innovatively provides the deep vein catheter with adjustable length, which is applicable to patients with different illness states, and even if the puncture position is not good, the head end of the deep vein catheter can reach the optimal position by adjusting the length of the deep vein catheter to puncture deeply, so that the corresponding requirements are met, the indwelling catheter does not need to be punctured again, the workload of medical staff is saved, and the pain of the patient is reduced.

In order to achieve the technical aim, the utility model discloses a length-adjustable deep vein catheter, which comprises an outer catheter and an inner catheter,

the head end of the inner conduit is embedded into the tail end of the outer conduit, the inner conduit is in sliding connection with the outer conduit, the head end of the inner conduit is in a horn shape, the outer edge of the head end of the inner conduit is in contact with the inner wall of the outer conduit, and the tail injection end of the inner conduit is positioned outside the outer conduit.

Further, the device also comprises a fixing clamp, wherein the fixing clamp is fixed outside the nested pipe bodies of the inner pipe and the outer pipe, connecting lugs are symmetrically arranged on two sides of the outer pipe on the fixing clamp, and connecting holes are formed in the connecting lugs.

Further, the fixation clamp includes first clamp body and second clamp body, the one end of first clamp body with the one end of second clamp body is articulated, the other end of first clamp body with the other end lock of second clamp body, be equipped with the bar groove in the second clamp body, the width of bar groove is greater than the diameter of outer pipe, the first clamp body with seal behind the second clamp body lock the notch in bar groove.

Further, the end part of the first clamp body, which is fastened and locked with the second clamp body, is provided with a positioning protrusion, the end part of the second clamp body is provided with a clamping groove matched with the positioning protrusion, the positioning protrusion is provided with a first bolt hole, the end part of the second clamp body is provided with a second bolt hole which penetrates through the clamping groove and corresponds to the first bolt hole, and the first clamp body and the second clamp body are fastened and locked by bolts penetrating through the first bolt hole and the second bolt hole.

Further, a movable lock catch is arranged at the end part of the first clamp body, which is in buckling locking with the second clamp body, and a fixed lock catch which is in buckling locking with the movable lock catch is arranged at the end part of the second clamp body.

Further, a plurality of first elastic protrusions are arranged on the inner wall of the first clamp body, corresponding to the strip-shaped groove, a plurality of second elastic protrusions are arranged on the inner wall of the strip-shaped groove of the second clamp body, and the first elastic protrusions and the second elastic protrusions are distributed along the width direction of the strip-shaped groove.

Further, a flow rate sensor is fixed at the head end of the outer catheter.

Further, the flow rate sensor is electrically connected with the flow rate display.

Further, the injection end of the inner catheter is of a single-cavity, double-cavity or three-cavity structure.

The beneficial effects of the utility model are as follows:

the length-adjustable deep vein catheter is adjustable, can be suitable for patients with different conditions, and can deeply puncture the head end of the deep vein catheter to reach the optimal position by adjusting the length of the deep vein catheter even if the puncture position is not good, so that corresponding requirements are met, the indwelling catheter does not need to be punctured again, the workload of medical staff is saved, and the pain of the patient is reduced.

Drawings

Fig. 1 is a schematic diagram of a length-adjustable deep vein catheter according to an embodiment of the present utility model.

Fig. 2 is a schematic structural view of a fixing clip according to an embodiment of the present utility model.

Fig. 3 is a schematic structural view of a fixing clip according to another embodiment of the present utility model.

Fig. 4 is a schematic structural view of a deep intravenous catheter with a dual lumen structure at the injection end of the present utility model.

Fig. 5 is a schematic structural view of a deep intravenous catheter with a three-lumen structure at the injection end according to the present utility model.

In the drawing the view of the figure,

1. an outer conduit; 2. an inner catheter; 3. a fixing clamp; 31. a first clamp body; 311. positioning the bulge; 312. a movable lock catch; 313. a first elastic protrusion; 32. a second clamp body; 321. a bar-shaped groove; 322. a clamping groove; 323. fixing the lock catch; 324. a second elastic protrusion; 33. a hinge shaft; 34. a plug pin; 4. a connecting lug; 41. a connection hole; 5. a flow rate sensor.

Detailed Description

The adjustable length deep intravenous catheter provided by the utility model is explained and illustrated in detail below with reference to the drawings.

The embodiment specifically discloses a length-adjustable deep vein catheter (hereinafter referred to as deep vein catheter), as shown in fig. 1, comprising an outer catheter 1 and an inner catheter 2, wherein the head end of the inner catheter 2 is embedded into the tail end of the outer catheter 1, the inner catheter 2 is slidably connected with the outer catheter 1, the head end of the inner catheter 2 is in a horn shape, the outer edge of the head end of the inner catheter 2 is in contact with the inner wall of the outer catheter 1, so as to avoid thrombus blocking caused by vortex of blood in the retention process, and the tail injection end of the inner catheter 2 is positioned outside the outer catheter 1. The injection end of the inner catheter 2 is of a single-cavity, double-cavity or three-cavity structure, the inner catheter of the single-cavity structure is shown in fig. 1, the inner catheter of the double-cavity structure is shown in fig. 4, the inner catheter of the three-cavity structure is shown in fig. 5, and the number of the cavities of the injection end is set according to actual clinical injection requirements.

Before or during the puncture indwelling process, the inner catheter 2 can be pulled outwards from the outer catheter 1 according to actual needs, and the horn-shaped outer edge at the head end of the inner catheter 2 slides along the inner wall of the outer catheter 1, so that the length of the whole deep venous catheter is increased, and the clinical application needs are met. Even if the puncture position is not good, the length of the deep vein catheter can be adjusted to deeply puncture the head end of the deep vein catheter to reach the optimal position, so that corresponding requirements are met, the indwelling catheter does not need to be punctured again, the workload of medical staff is saved, and the pain of a patient is reduced.

Because the outer edge of the head end of the inner catheter 2 is in contact with the inner wall of the outer catheter 1, the inner catheter 2 and the outer catheter 1 are usually made of rubber or plastic materials in clinic and have certain hardness, so that the head end of the inner catheter 2 and the inner wall of the outer catheter 1 are close to seal, but the inner catheter 2 can slide relative to the outer catheter 1 under the action of manpower, so that thrombus blocking blood vessels caused by vortex formation of blood in the retention process can be avoided. Preferably, as shown in fig. 1, the tail end of the outer catheter 1 is further provided with a peripheral edge surrounding the inner catheter 2, the inner wall of the peripheral edge is in contact with the outer wall of the inner catheter 2, the peripheral edge is matched with the horn-shaped head end of the inner catheter 2, the sealing effect between the inner catheter 2 and the outer catheter 1 is further improved, and the situation that blood, liquid medicine or nutrient solution flows out from a gap between the inner catheter 2 and the outer catheter 1 and leakage is avoided.

As shown in fig. 1, the deep intravenous catheter of this embodiment further includes a fixing clip 3, the fixing clip 3 is fixed outside the nested tube bodies of the inner catheter 2 and the outer catheter 1, the two sides of the outer catheter 1 on the fixing clip 3 are symmetrically provided with connecting lugs 4, and the connecting lugs 4 are provided with connecting holes 41. The connection between the inner catheter 2 and the outer catheter 1 is further reinforced by the fixing clip 3, and the fixing clip 3 can fix the positions of the inner catheter 2 and the outer catheter 1, and is connected and fixed with the skin of the human body by the suture passing through the connecting hole 41 on the connecting lug 4, so as to fix the position of the deep vein catheter.

As shown in fig. 2 and 3, the fixing clip 3 includes a first clip body 31 and a second clip body 32, one end of the first clip body 31 is hinged with one end of the second clip body 32, one ends of the first clip body 31 and the second clip body 32 are hinged through a hinge shaft 33, the other end of the first clip body 31 is locked with the other end of the second clip body 32 in a fastening manner, a strip-shaped groove 321 is formed in the second clip body 32, the width of the strip-shaped groove 321 is larger than the diameter of the outer catheter 1, the retention positions of the outer catheter 1 and the inner catheter 2 can be adjusted by adjusting the positions of the outer catheter 1 in the strip-shaped groove 321, the first clip body 31 and the second clip body 32 are locked in a fastening manner to close the notch of the strip-shaped groove 321, and the first clip body 31 and the second clip body 32 fix the outer catheter 1 and the inner catheter 2 in the strip-shaped groove 321 of the second clip body 32. In this embodiment, the groove depth of the groove 321 is smaller than the outer diameter of the outer catheter 1 and larger than the outer diameter of the inner catheter 2, and after the first clamping body 31 and the second clamping body 32 are locked in a fastening manner, the first clamping body 31 and the second clamping body 32 clamp the outer catheter 1, but the inner catheter 2 is not deformed, so that smooth delivery of the liquid medicine or nutrient solution is ensured.

As shown in fig. 2, a positioning protrusion 311 is disposed at an end portion of the first clamp body 31 fastened and locked with the second clamp body 32, a clamping groove 322 matched with the positioning protrusion 311 is disposed at an end portion of the second clamp body 32, a first bolt hole is disposed on the positioning protrusion 311, a second bolt hole penetrating through the clamping groove 322 and corresponding to the first bolt hole is disposed at an end portion of the second clamp body 32, and the first clamp body 31 and the second clamp body 32 are locked by a bolt 34 penetrating through the first bolt hole and the second bolt hole. With the view angle of fig. 2, the positioning protrusion 311 is disposed below the first clip body 31 and is located in the middle of the front-rear direction of the first clip body 31, the clamping groove 322 is disposed in the middle of the front-rear direction of the second clip body 32, the front-rear directions of the clamping groove 322 on the second clip body 32 are all provided with second bolt holes, and the two second bolt holes correspond to each other and penetrate the front-rear direction of the second clip body 32. In the process of fixing the inner catheter 2 and the outer catheter 1, the first clamp body 31 rotates around the hinge shaft 33, the notch of the strip-shaped groove 321 is opened, after the inner catheter 2 and the outer catheter 1 are placed in the strip-shaped groove 321, the first clamp body 31 rotates around the hinge shaft 33 in the opposite direction until the first clamp body 31 covers the notch of the strip-shaped groove 321, at the moment, the positioning protrusion 311 is clamped into the clamping groove 322, the first bolt hole and the second bolt hole are aligned, the bolts 34 are inserted into the aligned first bolt hole and second bolt hole, namely, the bolts 34 sequentially pass through the second bolt hole, the first bolt hole and the second bolt hole from front to back, and then the first clamp body 31 and the second clamp body 32 can be locked.

In another embodiment, as shown in fig. 3, a movable lock catch 312 is disposed at an end portion of the first clip body 31 locked with the second clip body 32, and a fixed lock catch 323 locked with the movable lock catch 312 is disposed at an end portion of the second clip body 32. As shown in fig. 3, the movable lock catch 312 and the fixed lock catch 323 may be hooks that are fastened to each other, the first clamp body 31 and the movable lock catch 312 are integrally formed of plastic, the second clamp body 32 and the fixed lock catch 323 are integrally formed of plastic, and when the first clamp body 31 and the second clamp body 32 are closed, the movable lock catch 312 is hooked on the fixed lock catch 323 by using elasticity of the plastic. Likewise, the snap of the movable lock catch 312 and the fixed lock catch 323 can be released by the elasticity of the plastic.

As shown in fig. 2 and 3, a plurality of first elastic protrusions 313 are provided on an inner wall of the first clip body 31 corresponding to the bar-shaped groove 321, and a plurality of second elastic protrusions 324 are provided on an inner wall of the bar-shaped groove 321 of the second clip body 32, the first elastic protrusions 313 and the second elastic protrusions 324 being arranged along a width direction of the bar-shaped groove 321. The first elastic protrusions 313 may be dot-shaped or bar-shaped, and the second elastic protrusions 324 may be dot-shaped or bar-shaped, and the bar-shaped elastic protrusions are disposed along the axial direction of the outer catheter 1. The first elastic protrusions 313 may be equally spaced apart, and the second elastic protrusions 324 may be equally spaced apart. Preferably, the first elastic protrusions 313 and the second elastic protrusions 324 are the same in number and in one-to-one correspondence, and only the second elastic protrusions 324 are provided at the bottom of the bar-shaped groove 321. When the first clamp 31 and the second clamp 32 are closed to clamp the outer catheter 1, the first elastic protrusion 313 and the second elastic protrusion 324 position the upper and lower outer walls of the outer catheter 1, thereby preventing the outer catheter 1 from rotating about its own axis.

As shown in fig. 1, in some embodiments, a flow sensor 5 is fixed to the head end of the outer catheter 1, the flow sensor 5 being used to detect the blood flow velocity at the head end of the outer catheter 1 during the indwelling procedure. The head end of the outer catheter 1 is a tip, and the flow rate sensor 5 is fixed on the outer wall of the head tip of the outer catheter 1, wherein the flow rate sensor 5 is a sensor commonly used in the art.

The present embodiment further includes a flow rate display, the flow rate sensor 5 is electrically connected with the flow rate display, for example, a wire is used to connect the flow rate sensor 5, so as to realize signal transmission, and the blood flow velocity value detected by the flow rate sensor 5 is displayed on the flow rate display.

In some embodiments, a communication connector may be disposed outside the outer catheter 1, and the communication connector is electrically connected to the flow rate sensor 5, and connected to a mobile terminal (such as a mobile phone, a tablet computer) through the communication connector, so as to perform signal transmission, and display a blood flow velocity value on the mobile terminal.

The method of using the deep vein catheter of this embodiment is as follows: the preparation and puncture process is the same as the existing deep vein catheter, after the successful puncture of the guide wire enters the blood vessel, the guide wire is slowly put into the outer catheter, the inner catheter and the flow velocity sensors on the outer catheter, the blood flow velocity value detected by the flow velocity sensor 5 in the indwelling process can be displayed on the flow velocity display, and whether the tip position of the outer catheter 1 is near the right atrium on the upper part of the superior vena cava can be judged according to the value on the flow velocity display, so that the erroneous entry into the blood vessel of the internal vein is prevented; after the positions are adjusted, the positions of the outer catheter 1 and the inner catheter 2 entering the skin are clamped in the strip-shaped grooves 321 of the fixing clamp, the first clamp body 31 and the second clamp body 32 are locked in a buckling mode, the fixing clamp 3 is ensured to be fixed on the skin through a suture line penetrating through the connecting hole 41, and the subsequent steps are carried out in the same way as the existing deep vein catheter for disinfection and film pasting.

Because the incidence rate of the displacement of the deep vein catheter is high, and the optimal position is easy to change according to different stages of the illness state, when a patient reviews chest films or ultrasonic waves and finds that the position of the tip of the external catheter 1 is not good, the buckling locking of the first clamp body 31 and the second clamp body 32 can be released, the external catheter 1 is moved along the width direction of the strip-shaped groove, and the positions of the external catheter 1 and the internal catheter 2 in the strip-shaped groove 321 are adjusted, so that the position of the tip of the external catheter 1 is adjusted, the fixed clamp 3 is not required to be removed or the deep vein catheter is not required to be placed again, and the cost and the workload of medical staff are saved; when the position of the outer guide pipe 1 is adjusted, the whole guide pipe length can be slidably adjusted between the outer guide pipe 1 and the inner guide pipe 2, so that the length requirement is met, and the head end of the outer guide pipe 1 can reach the optimal position; the horn-shaped head end of the inner catheter 2 is lapped on the inner side of the outer catheter 1 so as to prevent thrombus from blocking blood vessels caused by vortex formation of blood.

The flow rate display of the embodiment is positioned outside a human body and is a non-disposable sterile product, so that the cost can be greatly reduced, and the flow rate value can be displayed on the display every time the catheter is placed.

What is not described in detail in this specification is prior art known to those skilled in the art.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to the terms "present embodiment," "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any at least one embodiment or example. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

The above description is only of the preferred embodiments of the present utility model, and is not intended to limit the utility model, but any modifications, equivalents, and simple improvements made within the spirit of the present utility model should be included in the scope of the present utility model.

Claims (9)

1. A length-adjustable deep vein catheter is characterized by comprising an outer catheter (1) and an inner catheter (2),

the head end of the inner conduit (2) is embedded into the tail end of the outer conduit (1), the inner conduit (2) is in sliding connection with the outer conduit (1), the head end of the inner conduit (2) is in a horn shape, the outer edge of the head end of the inner conduit (2) is in contact with the inner wall of the outer conduit (1), and the tail injection end of the inner conduit (2) is positioned outside the outer conduit (1).

2. The length-adjustable deep intravenous catheter according to claim 1, further comprising a fixing clip (3), wherein the fixing clip (3) is fixed outside the nested tubular bodies of the inner catheter (2) and the outer catheter (1), connecting lugs (4) are symmetrically arranged on two sides of the outer catheter (1) on the fixing clip (3), and connecting holes (41) are formed in the connecting lugs (4).

3. The length-adjustable deep intravenous catheter according to claim 2, wherein the fixing clip (3) comprises a first clip body (31) and a second clip body (32), one end of the first clip body (31) is hinged with one end of the second clip body (32), the other end of the first clip body (31) is locked with the other end of the second clip body (32) in a fastening way, a strip-shaped groove (321) is arranged in the second clip body (32), the width of the strip-shaped groove (321) is larger than the diameter of the outer catheter (1), and the notch of the strip-shaped groove (321) is closed after the first clip body (31) is locked with the second clip body (32) in a fastening way.

4. A length-adjustable deep intravenous catheter according to claim 3, wherein the end of the first clamp body (31) locked with the second clamp body (32) is provided with a positioning protrusion (311), the end of the second clamp body (32) is provided with a clamping groove (322) matched with the positioning protrusion (311), the positioning protrusion (311) is provided with a first bolt hole, the end of the second clamp body (32) is provided with a second bolt hole penetrating through the clamping groove (322) and corresponding to the first bolt hole, and the first clamp body (31) and the second clamp body (32) are locked by a bolt (34) penetrating through the first bolt hole and the second bolt hole.

5. A length-adjustable deep intravenous catheter according to claim 3, wherein the end of the first clamp body (31) locked with the second clamp body (32) by fastening is provided with a movable lock catch (312), and the end of the second clamp body (32) is provided with a fixed lock catch (323) locked with the movable lock catch (312).

6. A length-adjustable deep intravenous catheter according to claim 3, wherein the inner wall of the first clip body (31) corresponding to the bar-shaped groove (321) is provided with a plurality of first elastic protrusions (313), the inner wall of the bar-shaped groove (321) of the second clip body (32) is provided with a plurality of second elastic protrusions (324), and the first elastic protrusions (313) and the second elastic protrusions (324) are arranged along the width direction of the bar-shaped groove (321).

7. The length-adjustable deep venous catheter according to any one of claims 1-6, characterized in that the head end of the outer catheter (1) is fixed with a flow sensor (5).

8. The length-adjustable deep intravenous catheter of claim 7, further comprising a flow rate display, wherein the flow rate sensor (5) is electrically connected to the flow rate display.

9. The length-adjustable deep intravenous catheter according to claim 1, wherein the injection end of the inner catheter (2) is of a single lumen, double lumen or triple lumen configuration.

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