Composite guide wire

Abstract

The utility model discloses a composite guide wire, and particularly relates to the technical field of guide wires, the composite guide wire comprises a first guide wire and a second guide wire, the first guide wire is sleeved on the outer side of the front end of the second guide wire, the first guide wire is a yellow zebra guide wire, the second guide wire is a Dierkjl guide wire, and a protection assembly is arranged on the outer side of the second guide wire and used for protecting the digestive tract of a patient. The front end of the second guide wire is provided with a wire insertion expansion assembly, the wire insertion expansion assembly comprises a polyurethane expansion head fixed to the front end of the first guide wire, and the rear end of the polyurethane expansion head is provided with an annular groove used for sampling. According to the utility model, through composite use of the yellow zebra guide wire and the Doulka guide wire, not only can the success rate of digestive tract catheterization be improved, but also digestive tract perforation can be avoided, and the use is safer.

Description

Technical Field

[0001] This utility model relates to the field of guidewire technology, specifically to a composite guidewire. Background Technology

[0002] A guidewire is a medical device that plays a vital role in the medical field. Guidewires are typically long, thin, and flexible metal wires, generally made of materials such as stainless steel or nickel-titanium alloys. For example, there is a medical guidewire with the publication number CN213760127U. During interventional procedures, medical personnel can manipulate the guidewire externally, precisely controlling its advancement, retraction, and direction within the body. For instance, when placing a feeding tube, the guidewire needs to provide sufficient support to ensure the tube can smoothly pass through the digestive tract and reach the stomach.

[0003] Currently, there are two types of guidewires:

[0004] 1. Fulkai-type guidewires: Fulkai-type guidewires are typically used to assist in the insertion of Fulkai nasogastric tubes or other types of feeding tubes. Fulkai nasogastric tubes are commonly used for stroke patients in a coma or other patients requiring nasogastric feeding. Their advantages include ease of placement, ease of care, and safety and comfort. However, Fulkai-type guidewires have the following problems: The guidewires that come with Fulkai catheters are relatively thick, with a consistent thickness throughout, providing sufficient support, but their length is insufficient. They cannot pass through the feeding tube to provide guidance; they only provide support. Furthermore, because of their thickness, using them to guide the insertion of a feeding tube can easily cause gastrointestinal perforation.

[0005] 2. The yellow zebra guidewire is primarily used for endoscopic treatment, especially in managing complete upper gastrointestinal strictures. Its design facilitates passage through tortuous and narrow areas, and its bi-colored stripes aid in endoscopic monitoring of guidewire movement. The yellow zebra guidewire has a soft tip, reducing the risk of gastrointestinal perforation. However, the yellow zebra guidewire also has the following drawbacks: the posterior section is relatively thin, providing insufficient support when used for nasogastric tube insertion.

[0006] Therefore, this invention proposes a novel guidewire composed of a combination of a Fulka guidewire and a yellow zebra guidewire. Utility Model Content

[0007] The purpose of this invention is to provide a composite guidewire that combines zebra guidewire and Fulka guidewire, which can improve the success rate of gastrointestinal tube placement and avoid gastrointestinal perforation, making it safer to use.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a composite guidewire, comprising guidewire one and guidewire two, wherein the guidewire one is attached to the outer side of the front end of guidewire two, guidewire one is a yellow zebra guidewire, and guidewire two is a Fulkai guidewire;

[0009] The guidewire is equipped with a protective component on its outer side to protect the patient's digestive tract;

[0010] The second guide wire is provided with a wire expansion assembly at its front end. The wire expansion assembly includes a polyurethane expansion head fixed at the front end of the first guide wire. The rear end of the polyurethane expansion head is provided with an annular groove for sampling.

[0011] Preferably, the protective component includes a polyurethane protective sleeve fixedly sleeved on the outside of the second guidewire, the front end of the polyurethane protective sleeve contacting the rear end of the first guidewire.

[0012] Preferably, the polyurethane expander head has a tapered cross-section to expand the narrow digestive tract for easy wire insertion.

[0013] Preferably, the end of the first guide wire near the second guide wire is machined with a slot that is compatible with the second guide wire. The end of the second guide wire near the first guide wire is inserted into the slot, which facilitates the installation and removal of the first guide wire and the second guide wire, and makes it easy to separate the first guide wire and the second guide wire for replacement.

[0014] Preferably, at least one polyurethane locking block is fixedly provided at one end of the polyurethane protective sleeve near the first guide wire, and the end of the first guide wire near the polyurethane protective sleeve is machined with the same number of slots as the polyurethane locking blocks. The polyurethane locking blocks are engaged in the slots to reinforce the connection between the polyurethane protective sleeve and the first guide wire.

[0015] Preferably, the inner wall surface of the slot is machined with at least one positioning groove, and the outer wall of the second guide wire is fixed with the same number of positioning blocks as the positioning groove. The positioning blocks are inserted into the positioning groove to guide the first guide wire and the second guide wire to be accurately inserted.

[0016] Preferably, the outer surface of the guidewire, the outer surface of the polyurethane protective sleeve, and the outer surface of the polyurethane expansion head are all coated with a hydrophilic polymer coating. The hydrophilic polymer coating has good wettability, which can reduce the resistance of digestive tract mucus to the composite guidewire, thereby making the composite guidewire move more smoothly during its movement.

[0017] Preferably, the outer wall of the hydrophilic polymer coating is sprayed with a yellow mottled coating, which makes the composite guidewire more clearly visible under X-ray fluoroscopy, making it easier for medical staff to accurately observe the position and direction of the composite guidewire during insertion, thereby enabling better operation.

[0018] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0019] 1. The guidewire of this utility model is composed of a yellow zebra guidewire and a Fulkai guidewire. The yellow zebra guidewire is selected as the first guidewire for cannulation, and the Fulkai guidewire with the end handle cut off is used as the second guidewire. The thick and rigid part of the Fulkai guidewire is used as support, and the ultra-soft part of the front end of the yellow zebra guidewire is used as the guide for cannulation. This makes it convenient to directly withdraw the indwelling guidewire after cannulation and then insert the catheter along the guidewire. The operation can be completed under X-ray fluoroscopy or only under direct vision of the gastroscopy, which can greatly improve the success rate of nasojejunal feeding tube and nasogastric tube placement in patients with gastrointestinal stenosis.

[0020] 2. The polyurethane dilatation head is designed to dilate narrow digestive tracts, allowing for the smooth insertion of guidewire one and guidewire two;

[0021] 3. The annular groove on the polyurethane dilatation head is used to collect part of the mucus in the digestive tract. The mucus is removed together with the composite guidewire, which facilitates sampling and testing by medical staff and helps them to formulate reasonable treatment plans.

[0022] 4. The guide wire 1, guide wire 2 and polyurethane protective sleeve are connected by a plug-in method, which makes it easy to separate guide wire 1 and guide wire 2 for individual replacement. Attached Figure Description

[0023] Figure 1 This is an overall structural diagram of the present invention;

[0024] Figure 2 This is a partial structural diagram of the present invention;

[0025] Figure 3 This is a side view of the overall structure of this utility model;

[0026] Figure 4 This is a side sectional view of the overall structure of this utility model;

[0027] Figure 5 This is a rear view of the overall structure of this utility model;

[0028] Figure 6 This is a structural diagram of guide wire one and guide wire two of this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Guide wire one, 2. Guide wire two, 3. Polyurethane protective sleeve, 4. Polyurethane expansion head, 5. Annular groove, 6. Slot, 7. Polyurethane card block, 8. Card slot, 9. Positioning slot, 10. Positioning block, 11. Yellow patterned coating. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0032] This utility model provides, for example Figures 1-6 The composite guidewire shown includes guidewire 1 and guidewire 2. Guidewire 1 is sleeved on the outer side of the front end of guidewire 2. Guidewire 1 uses a yellow zebra guidewire with a 5cm black ultra-soft front end and a 25cm yellow section as a guide during cannulation. Guidewire 2 uses a Fulkai guidewire with the end handle cut off. Guidewire 2 provides support, allowing the endoscope to be withdrawn directly after cannulation, leaving the guidewire in place, and then inserting the catheter along the guidewire. The operation can be completed under X-ray fluoroscopy or only under direct endoscopic visualization, which can greatly improve the success rate of nasojejunal feeding tube and nasogastric tube placement in patients with gastrointestinal stenosis.

[0033] Furthermore, the guide wire 1 can be 5cm long, the guide wire 2 can be 30cm long, and the polyurethane protective sleeve 3 can be 25cm long. The composite guide wire is long overall, which makes it convenient to directly withdraw the endoscope after insertion when using an endoscope to assist in insertion, leaving the composite guide wire in place, and then inserting a nasojejunal feeding tube or nasogastric tube with the help of the composite guide wire.

[0034] The soft part of the yellow zebra guidewire is selected as guidewire 1, and the thick and hard part of the Fulkai guidewire is selected as guidewire 2. Guidewire 2 plays a supporting role inside guidewire 1, which can greatly improve the success rate of nasojejunal feeding tube and nasogastric tube placement in patients with gastrointestinal stenosis.

[0035] like Figures 1-5 As shown, in order to prevent guidewire 2 from damaging the patient's digestive tract, a protective component is provided on the outside of guidewire 2 to protect the patient's digestive tract. Specifically, the protective component includes a polyurethane protective sleeve 3 fixedly sleeved on the outside of guidewire 2. The front end of the polyurethane protective sleeve 3 contacts the rear end of guidewire 1. Because the polyurethane protective sleeve 3 is made of polyurethane material, which has high strength, high elasticity and softness, it can play a protective role on the outside of guidewire 2, preventing guidewire 2 from scratching the patient's digestive tract.

[0036] like Figures 1-5 As shown, in order to improve the smoothness of the composite guidewire insertion, a wire insertion expansion assembly is provided at the front end of the second guidewire 2. The wire insertion expansion assembly includes a polyurethane expansion head 4 fixed at the front end of the first guidewire 1. The polyurethane expansion head 4 has a tapered cross section to expand the narrow digestive tract for smooth wire insertion. The polyurethane expansion head 4 at the front end of the first guidewire 1 and the first guidewire 1 are made of soft material, which can prevent injury to the patient's digestive tract and stomach wall during wire insertion, making it safer to use. The rear end of the polyurethane expansion head 4 has an annular groove 5 for sampling.

[0037] When inserting the composite guidewire, the polyurethane dilatation head 4 at the tip of guidewire 1 can dilate the narrowed digestive tract to facilitate the smooth insertion of guidewire 1 and guidewire 2. The annular groove 5 on the polyurethane dilatation head 4 has a storage function. When the composite guidewire is removed, the mucus in the digestive tract can flow into the annular groove 5 and be removed with the composite guidewire for sampling and testing by medical staff, which facilitates the development of a reasonable treatment plan.

[0038] In addition, to make the surface of the composite guidewire more lubricated, a hydrophilic polymer coating is sprayed on the outer wall of guidewire 1, the outer wall of polyurethane protective sleeve 3, and the outer wall of polyurethane expansion head 4. The hydrophilic polymer coating has good wettability, which makes the surfaces of guidewire 1, polyurethane protective sleeve 3, and polyurethane expansion head 4 more lubricated, thereby reducing the resistance of gastrointestinal mucus to the composite guidewire, and thus allowing the composite guidewire to move more smoothly in the gastrointestinal tract. Furthermore, the outer wall of the hydrophilic polymer coating is also sprayed with a yellow patterned coating 11, which makes the composite guidewire more clearly visible under X-ray fluoroscopy, making it easier for medical staff to accurately observe the position and direction of the composite guidewire during insertion, thereby making the operation better.

[0039] like Figure 3 and 5 As shown, in order to facilitate the disassembly and assembly of guide wire 1 and guide wire 2, a slot 6 adapted to guide wire 2 is machined at the end of guide wire 1 near guide wire 2, and the end of guide wire 2 near guide wire 1 is inserted into the slot 6.

[0040] Furthermore, at least one polyurethane locking block 7 is fixedly provided at one end of the polyurethane protective sleeve 3 near the guide wire 1. The guide wire 1 near the polyurethane protective sleeve 3 is machined with the same number of slots 8 as the polyurethane locking blocks 7. The polyurethane locking blocks 7 are engaged in the slots 8 to reinforce the connection between the polyurethane protective sleeve 3 and the guide wire 1.

[0041] To facilitate medical staff in accurately placing the guide wire onto the second guide wire, at least one positioning groove 9 is machined on the inner wall surface of the slot 6. The outer wall of the second guide wire 2 is fixed with the same number of positioning blocks 10 as the positioning groove 9. The positioning blocks 10 are inserted into the positioning groove 9 to guide the first guide wire 1 and the second guide wire 2 to be accurately inserted.

[0042] By pinching the conical polyurethane expansion head 4 and slowly pulling the guide wire 1, the guide wire 1 can be pulled out from the guide wire 2. When reinstalling, first align the multiple positioning grooves 9 on the guide wire 1 with the multiple positioning blocks 10 on the guide wire 2 and insert them. When the rear end of the guide wire 1 is in contact with the front end of the polyurethane protective sleeve 3, the multiple polyurethane locking blocks 7 are inserted into the multiple locking grooves 8 respectively, thus completing the connection between the guide wire 1, the guide wire 2, and the polyurethane protective sleeve 3, making it convenient for medical staff to disassemble the guide wire 1 and the guide wire 2 for individual replacement.

Claims

1. A composite guidewire, characterized in that: It includes guide wire one (1) and guide wire two (2), the guide wire one (1) is sleeved on the outside of the front end of guide wire two (2), the guide wire one (1) is a yellow zebra guide wire, and the guide wire two (2) is a Fulka guide wire; The guidewire 2 (2) is provided with a protective component on its outer side to protect the patient's digestive tract; The front end of the second guide wire (2) is provided with a wire expansion assembly, which includes a polyurethane expansion head (4) fixed at the front end of the first guide wire (1). The rear end of the polyurethane expansion head (4) is provided with an annular groove (5) for sampling.

2. The composite guidewire according to claim 1, characterized in that: The protective component includes a polyurethane protective sleeve (3) fixedly sleeved on the outside of the second guide wire (2), the front end of the polyurethane protective sleeve (3) being in contact with the rear end of the first guide wire (1).

3. The composite guidewire according to claim 1, characterized in that: The polyurethane expansion head (4) has a tapered cross-section to expand the narrow digestive tract for easy wire insertion.

4. The composite guidewire according to claim 1, characterized in that: The guide wire 1 (1) has a slot (6) that is compatible with the guide wire 2 (2) at one end, and the guide wire 2 (2) is inserted into the slot (6) at one end.

5. A composite guidewire according to claim 2, characterized in that: At least one polyurethane clip (7) is fixedly provided at one end of the polyurethane protective sleeve (3) near the guide wire (1). The guide wire (1) near the polyurethane protective sleeve (3) has a number of slots (8) equal to the number of polyurethane clips (7). The polyurethane clips (7) are engaged in the slots (8) to reinforce the connection between the polyurethane protective sleeve (3) and the guide wire (1).

6. A composite guidewire according to claim 4, characterized in that: The inner wall surface of the slot (6) is machined with at least one positioning groove (9), and the outer wall of the second guide wire (2) is fixed with the same number of positioning blocks (10) as the positioning groove (9). The positioning blocks (10) are inserted into the positioning groove (9) to guide the first guide wire (1) and the second guide wire (2) to be accurately inserted.

7. A composite guidewire according to claim 2, characterized in that: The outer surface of the guide wire (1), the outer surface of the polyurethane protective sleeve (3), and the outer surface of the polyurethane expansion head (4) are all coated with hydrophilic polymer coating.

8. A composite guidewire according to claim 7, characterized in that: The outer wall of the hydrophilic polymer coating is sprayed with a yellow mottled coating (11).

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