Oral-nasal exchange catheter capable of memorizing nasobiliary duct

Abstract

The utility model belongs to the technical field of medical instruments, in particular to an oral-nasal exchange catheter capable of memorizing a nasobiliary duct, which comprises an exchange catheter body used for oral-nasal exchange of the nasobiliary duct, a guide wire is arranged in the exchange catheter body, the guide wire is used for guiding the exchange catheter body to smoothly enter a nasal cavity and reach a posterior pharyngeal wall, and the guide wire is connected with a handle. The indwelling end of the exchange catheter body is a head end, the head end adopts a spiral memory design, and a C-shaped bend can be automatically formed to be bounced into an oral cavity after a guide wire is withdrawn. When the exchange catheter is used, the operation process can be simplified, stimulation and risks to the oropharynx of a patient are reduced, and meanwhile the exchange catheter is convenient to use. Meanwhile, the nasobiliary duct can accurately and rapidly reach the target position, the success rate of the operation is increased, and medical staff can conveniently read the placement depth of the exchange catheter body through the arrangement of the scales on the outer wall of the exchange catheter body.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a memoryable nasobiliary tube oral-nasal exchange catheter. BACKGROUND

[0002] In the existing medical practice, nasobiliary tube drainage is one of the common treatment methods in hepatobiliary surgery and gastroenterology, and plays an important role in the treatment of diseases such as biliary obstruction, bile leakage and pancreatitis. The traditional oral-nasal conversion method, such as using an oval clamp to take or a guide wire to take a nasal guide tube, can realize the conversion of the oral-nasal passage, but the operation is complex, the patient's oral pharyngeal stimulation symptoms are obvious, and there is a risk of damaging the mucosa. This not only increases the patient's pain, but also affects the safety and success rate of the operation. With the continuous progress of medical technology, a more simple, safe and efficient oral-nasal conversion method for nasobiliary tube has been gradually explored in clinical practice. The guide wire extraction method is widely used because of its relatively simple operation. However, this method still depends on the operation skills and experience of doctors, and there are problems such as difficulty in capturing the guide wire in the oral cavity and replacing the nasobiliary tube. SUMMARY

[0003] In view of the above problems, the utility model aims to provide a memoryable nasobiliary tube oral-nasal exchange catheter to solve the problems raised in the background art.

[0004] To achieve the above purpose, the utility model adopts the technical scheme of a memoryable nasobiliary tube oral-nasal exchange catheter, which comprises an exchange catheter body for oral-nasal exchange of the nasobiliary tube. The exchange catheter body is internally provided with a guide wire, which is used to guide the exchange catheter body to smoothly enter the nasal cavity and reach the posterior pharyngeal wall. The guide wire is connected with a handle. The indwelling end of the exchange catheter body is a head end, and the head end is designed with a spiral memory. After the guide wire is withdrawn, the head end can automatically form a C-shaped curved bend to enter the oral cavity.

[0005] The utility model has the advantages that in use, the utility model can not only simplify the operation process, reduce the stimulation and risk to the patient's oral pharynx, but also facilitate the accurate and rapid arrival of the nasobiliary tube at the target position, thereby improving the success rate of the operation.

[0006] In order to facilitate the reduction of resistance, increase the smoothness of intubation and avoid damage to the mucosa:

[0007] As a further improvement of the above technical scheme, the head end opening of the exchange catheter body is a circular arc without edges and corners.

[0008] The improvement has the advantage that the head end opening of the exchange catheter body is a circular arc without edges and corners, which can effectively reduce the resistance during intubation, make the intubation process smoother, and avoid damage to the mucosa.

[0009] To facilitate medical staff to read the insertion depth of the exchange catheter body:

[0010] As a further improvement of the above technical solution: a scale is set on the outer wall of the exchange catheter body along its length direction.

[0011] The beneficial effect of this improvement is that by setting up the scale on the outer wall of the exchange catheter body, medical staff can easily read the insertion depth of the exchange catheter body.

[0012] To help maintain irritation and shape stability:

[0013] As a further improvement of the above technical solution: the exchange catheter body is made of polyurethane material.

[0014] The beneficial effects of this improvement are: by changing the material of the catheter body to polyurethane, which has moderate hardness and softness, good wear resistance and high elastic modulus, when used, it can not only reduce irritation and discomfort to the patient, and facilitate repeated disinfection, but also can restore to its original shape within a certain limit deformation range, effectively maintaining good shape stability.

[0015] To facilitate the guidance of the exchange catheter into the nasal cavity and reach the posterior pharyngeal wall:

[0016] As a further improvement of the above technical solution: the guide wire is a bundled steel wire.

[0017] The beneficial effect of this improvement is that the guide wire is a bundled steel wire that is not easy to bend, which can facilitate the guidance of the exchange catheter body into the nasal cavity and reach the posterior pharyngeal wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the catheter body after the guidewire is withdrawn according to the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the connection structure between the guide wire and the exchange catheter body of the present invention;

[0021] Figure 4 This is a schematic diagram of the guide wire structure of the present utility model;

[0022] In the figure: 1. Exchange catheter body; 2. Guidewire; 3. Handle; 4. Scale. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention.

[0024] As shown in 1-4, a memory nasobiliary oro-nasal exchange catheter comprises an exchange catheter body 1 for naso-biliary oro-nasal exchange, the exchange catheter body 1 having a built-in guide wire 2, the guide wire 2 being used to guide the exchange catheter body 1 to smoothly enter the nasal cavity and reach the posterior pharyngeal wall, the guide wire 2 being connected to a handle 3, the retention end of the exchange catheter body 1 being the head end, and the head end adopts a spiral memory design, which can automatically form a C-shaped bend and bounce into the oral cavity after the guide wire 2 is withdrawn. When the utility model is used, it can not only simplify the operation process and reduce the irritation and risk to the patient's oropharynx, but also facilitate the naso-biliary duct to reach the target position accurately and quickly, thereby improving the success rate of the operation. The head end opening of the exchange catheter body 1 is a circular arc without sharp corners. By having the head end opening of the exchange catheter body 1 be a circular arc without sharp corners, it can effectively reduce the insertion error during intubation. The resistance during the tube insertion process makes the intubation process smoother and avoids damage to the mucosa. A scale 4 is set on the outer wall of the exchange catheter body 1 along its length. The establishment of the scale 4 on the outer wall of the exchange catheter body 1 can facilitate medical staff to read the insertion depth of the exchange catheter body 1. The exchange catheter body 1 is made of polyurethane material. The material of the exchange catheter body 1 is polyurethane, which is moderately soft and hard, and has good wear resistance and high elastic modulus. When used, it can not only reduce irritation and discomfort to the patient, but also facilitate repeated disinfection. At the same time, it can also restore its original shape within a certain limit deformation range, effectively maintaining good shape stability. The guide wire 2 is a bundled steel wire. The guide wire 2 is a bundled steel wire, which is not easy to bend, and can facilitate guiding the exchange catheter body 1 to smoothly enter the nasal cavity and reach the posterior pharyngeal wall.

[0025] The working principle of the present invention is as follows: when in use, select a suitable nasobiliary duct and exchange catheter body 1, ensure that all instruments are in a sterile or disinfected state, insert the exchange catheter body 1 from the nostril, and keep the built-in guide wire 2 in a tight state, guide the exchange catheter body 1 to smoothly enter the nasal cavity and reach the posterior pharyngeal wall, and after reaching the designated position, pinch the handle 3 and slowly withdraw the guide wire 2. At this time, the head end of the exchange catheter body 1 automatically forms a C-shaped bend under memory and bounces into the oral cavity. At this time, the medical staff can deliver the nasobiliary duct into the exchange catheter body through the oral cavity, and continue to push it forward to the desired position, and then pull the exchange catheter body 1 out of the nasal cavity, so that the nasobiliary duct remains in place for fixation, and the head end opening of the exchange catheter body 1 is The arc shape without sharp edges can effectively reduce the resistance during intubation, making the intubation process smoother and avoiding damage to the mucosa. The establishment of the scale 4 on the outer wall of the exchange catheter body 1 can facilitate medical staff to read the insertion depth of the exchange catheter body 1. The material of the exchange catheter body 1 is polyurethane, which is moderately soft and hard, and has good wear resistance and high elastic modulus. When used, it can not only reduce irritation and discomfort to the patient, but also facilitate repeated disinfection. At the same time, it can also restore its original shape within a certain limit deformation range, effectively maintaining good shape stability. The guide wire 2 is a bundled steel wire, which is not easy to bend, and can facilitate guiding the exchange catheter body 1 to smoothly enter the nasal cavity and reach the posterior pharyngeal wall.

[0026] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0027] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the present invention to other occasions without improvement, should be regarded as the scope of protection of the present invention.

Claims

1. A memory nasobiliary oronasal exchange catheter, comprising an exchange catheter body (1) for nasobiliary oronasal exchange, characterized in that: The exchange catheter body (1) has a built-in guide wire (2), which is used to guide the exchange catheter body (1) to smoothly enter the nasal cavity and reach the posterior pharyngeal wall. The guide wire (2) is connected to a handle (3). The indwelling end of the exchange catheter body (1) is the head end, and the head end adopts a spiral memory design, which can automatically form a C-shaped curve and bounce into the oral cavity after the guide wire (2) is withdrawn.

2. The memory nasobiliary oronasal exchange catheter according to claim 1, characterized in that: The head end opening of the exchange catheter body (1) is in the shape of a circular arc without sharp corners.

3. The memory nasobiliary oro-nasal exchange catheter according to claim 1, characterized in that: Scales (4) are provided on the outer wall of the exchange catheter body (1) along its length direction.

4. The memory nasobiliary oro-nasal exchange catheter according to claim 1, characterized in that: The exchange catheter body (1) is made of polyurethane material.

5. The memory nasobiliary oro-nasal exchange catheter according to claim 1, characterized in that: The guide wire (2) is a bundled steel wire.

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