Guiding extension catheter capable of being fixed with guiding catheter

Abstract

A guide extension catheter capable of being fixed with a guide catheter is characterized in that the rear end of the guide extension catheter is connected with a pushing assembly through a connecting catheter, the guide extension catheter is sleeved with the guide catheter, the guide extension catheter is sleeved with a balloon catheter, and the balloon catheter is arranged between the guide catheter and the guide extension catheter; the balloon catheter comprises a first anchoring balloon, a second anchoring balloon and a connecting channel communicated with the first anchoring balloon and the second anchoring balloon. The saccules for fixing the extension tube are arranged at the two ends of the extension tube, so that the stability is better, the situation that the operation difficulty is increased due to shaking of the guide extension catheter in the operation process is avoided, the operation difficulty of a doctor is reduced, and the operation safety is improved.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to a guide extension catheter which can be fixed with a guide catheter. Background Art

[0002] In percutaneous coronary intervention (PCI), high-resistance coronary artery lesions such as severe calcification and chronic occlusion are often encountered. When using a guide catheter and a guide wire, the guide catheter may be difficult to pass through the lesion due to insufficient support or instability, thus affecting the operation. The authorization announcement number CN 219001689U discloses a guide extension catheter with a balloon structure, in which an extension tube, a hypotube, and a Luer connector are arranged in sequence from the distal end to the proximal end. A balloon that is funnel-shaped after filling is arranged on the outer wall of the proximal end of the extension tube, and the larger opening faces the proximal end to form the entry end of the interventional coronary device. One end of the hypotube is embedded and installed in the extension tube and connected to the balloon to provide a channel for balloon filling. The other end of the hypotube is connected to the Luer connector. However, this solution only provides a balloon at one end of the extension catheter close to the hypotube, resulting in insufficient stability of the extension catheter. Summary of the invention

[0003] The problem to be solved by the utility model is to provide a guide extension catheter that can be fixed to a guide catheter. Balloons for fixing the guide extension catheter are provided at both ends of the guide extension catheter, which has better stability, avoids increasing surgical difficulty due to shaking of the guide extension catheter during surgery, reduces the doctor's operating difficulty, and increases surgical safety.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a guide extension catheter that can be fixed to a guide catheter, the rear end of the guide extension catheter is connected to a push assembly through a connecting catheter, the guide catheter is sleeved outside the guide extension catheter, and a balloon catheter is sleeved on the guide extension catheter, and the balloon catheter is arranged between the guide catheter and the guide extension catheter, the balloon catheter includes a first anchoring balloon, a second anchoring balloon and a connecting channel connecting the first anchoring balloon and the second anchoring balloon, the first anchoring balloon is arranged on the outer wall of the front end of the guide extension catheter, and the second anchoring balloon is arranged on the outer wall of the tail end of the guide extension catheter; one end of the connecting catheter is inserted into the wall of the tail end of the guide extension catheter and is connected with the balloon catheter, the other end of the connecting catheter is connected to the push assembly, and the push assembly is connected to a pressure pump. The working principle of the utility model is as follows: a first anchoring balloon and a second anchoring balloon for fixing the guide extension catheter are provided at both ends of the guide extension catheter; the first anchoring balloon fits with the inner wall of the guide catheter after being inflated, and the second anchoring balloon fits with the inner wall of the patient's blood vessel after being inflated, thereby ensuring the stability of the guide extension catheter and reducing the operating difficulty of the surgeon.

[0005] As an improvement, a protective ring is provided on the guiding extension catheter, and the protective ring is arranged between the balloon catheter and the guiding extension catheter.

[0006] As an improvement, the protective ring is a stainless steel ring.

[0007] As an improvement, a valve for controlling the gas flow in the connecting catheter to the balloon catheter is provided on the connecting catheter.

[0008] As an improvement, the inner diameter of the guiding extension catheter is 1.4 mm, and the outer diameter of the guiding extension catheter is 1.7 mm.

[0009] As an improvement, the guiding extension catheter sequentially includes a polymer material layer, a reinforcing layer, and a PTFE inner layer from the outside to the inside. The polymer material layer is coated with a hydrophilic coating, and the reinforcing layer is a metal reinforcing layer or a fiber reinforcing layer.

[0010] As an improvement, an anticoagulant coating is provided on the outer surfaces of the guiding extension catheter and the balloon catheter.

[0011] The beneficial effects of the present utility model are as follows:

[0012] 1. By providing balloons at both ends of the extension tube, a fixing device is available at both ends of the extension tube during the operation, making the extension tube more stable during the operation, avoiding the shaking of the extension tube, and reducing the operation difficulty of the operation.

[0013] 2. The first anchoring balloon fits with the inner wall of the guiding catheter, enhancing the supporting force of the guiding catheter and avoiding the occurrence of medical accidents; at the same time, preventing objects such as guide wires or stents from entering the gap between the guiding catheter and the balloon catheter.

[0014] 3. In the inflated state of the balloon catheter, the protective ring can prevent the extension tube from deforming and being damaged, increasing the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a cross-sectional view of the present utility model.

[0016] Figure 2 is a cross-sectional view of the second anchoring balloon and the guiding catheter.

[0017] Figure 3 is a cross-sectional view of the first anchoring balloon and the guiding catheter.

[0018] Explanation of reference numerals in the figure: 1. Guiding extension catheter; 11. PTFE inner layer; 12. Reinforcing layer; 13. Polymer material layer; 2. Balloon catheter; 21. First anchoring balloon; 22. Connection channel; 23. Second anchoring balloon; 24. Protection ring; 3. Guiding catheter; 4. Connection catheter; 41. Filling pipeline; 42. Valve; 5. Pushing assembly. Embodiment

[0019] The present utility model will be further described in detail below with reference to the accompanying drawings of the specification;

[0020] As Figure 1 , 2 , as shown in FIGS. 3, a guiding extension catheter that can be fixed to a guiding catheter, the rear end of the guiding extension catheter 1 is connected to a pushing assembly 5 through a connection catheter 4, the guiding catheter 3 is sleeved outside the guiding extension catheter 1, a balloon catheter 2 is sleeved outside the guiding extension catheter 1, the balloon catheter 2 is arranged between the guiding catheter 3 and the guiding extension catheter 1, and the balloon catheter 2 includes a first anchoring balloon 21, a second anchoring balloon 23 and a connection channel 22 for communicating the first anchoring balloon 21 and the second anchoring balloon 23; the first anchoring balloon 21 is located on the outer wall of the front end of the guiding extension catheter 1, and the second anchoring balloon 23 is located on the outer wall of the rear end of the guiding extension catheter 1; one end of the connection catheter 4 is inserted into the rear end of the guiding extension catheter 1 and communicated with the balloon catheter 2 through a filling pipeline 41, the other end of the connection catheter 4 is connected to the pushing assembly 5, a pressure pump for filling the balloon is connected to the pushing assembly 5, and a valve 42 for controlling the gas flow in the connection catheter 4 to the balloon catheter 2 is arranged on the connection catheter 4. The pressure pump fills gas into the connection catheter 4, the valve 42 is opened, and the gas sequentially passes through the connection catheter 4 and the filling pipeline 41 and enters the balloon catheter 2; so that the second anchoring balloon 23 can be filled and contact the inner wall of the guiding catheter 3, and can provide a stronger supporting force for the guiding catheter 3, improving the efficiency and success rate of the operation; the first anchoring balloon 21 is filled and contacts the inner wall of the patient's blood vessel, the front end and the rear end of the guiding extension catheter 1 are fixed, relative movement between the extension tube and the guiding catheter 3 is avoided, the guiding extension catheter 1 is made more stable, the operation difficulty of the operation is reduced, and the burden on the surgical staff is reduced.

[0021] As Figure 2 and Figure 3As shown, the inner diameter of the guiding extension catheter 1 is 1.4 mm and the outer diameter is 1.7 mm. The guiding extension catheter 1 is composed of multiple layers of composite materials, which are, from outside to inside, a polymer material layer 13, a reinforcing layer 12, and a PTFE inner layer 11. An anticoagulant coating is applied on the outer surface of the polymer material layer 13. When the extension tube enters the body, the anticoagulant coating can prevent blood clots. The reinforcing layer 12 is a metal reinforcing layer 12 or a fiber reinforcing layer 12. The multi-layer composite material of the extension tube is prepared by composite processes such as spraying, dipping, welding, soldering, co-extrusion, etc. Anticoagulant coatings for preventing blood clots are also provided on the outer surfaces of the balloon catheter 2 and the connecting catheter 4.

[0022] As Figure 1 , 2 , as shown in Figure 3, a protective ring 24 for protecting the guiding extension catheter 1 is provided on the guiding extension catheter 1. The protective ring 24 is a stainless steel ring and is provided between the guiding extension catheter 1 and the balloon catheter 2. During the inflation stage of the balloon catheter 2, the guiding extension catheter 1 will also be squeezed by air pressure, which may cause the guiding extension catheter 1 to deform. The protective ring 24 can prevent the guiding extension catheter 1 from deforming, thereby preventing the guiding extension catheter 1 from being damaged, increasing the safety of the device, and thus improving the safety of the operation.

[0023] The working principle of the present utility model is as follows: First, the catheter sheath percutaneous puncture technique is performed. The doctor selects a suitable guiding catheter 3 and an access method according to the disease condition. After the tip of the guiding catheter 3 enters the arterial opening, a Y-valve is connected, a 0.014" guide wire is inserted, the front end of the guiding extension catheter 1 is inserted proximally along the guide wire into the guiding catheter 3, and the guiding extension catheter 1 extends beyond the distal end of the guiding catheter 3 to reach a predetermined position. The pushing assembly 5, the connecting catheter 4, and the extension tube are connected. The pressure pump is turned on, and the pressure pump delivers gas through the connecting catheter 4 and the inflation pipeline 41 into the balloon catheter 2. The protective ring 24 can prevent the extension tube from deforming and avoid damage to the extension tube. The second anchoring balloon 23 is inflated to a full state and is in close contact with the inner wall of the guiding catheter 3, providing a supporting force to the guiding catheter 3, avoiding medical accidents such as guide wire entanglement, anchoring vessel injury, coronary perforation, and dissection due to insufficient support of the guiding catheter 3, and increasing the safety of the operation. The first anchoring balloon 21 is inflated to a full state and is in contact with the inner wall of the blood vessel. At this time, the first anchoring balloon 21 and the second anchoring balloon 23 are respectively fixed to the blood vessel and the guiding catheter 3, which can play a good fixing role, reduce the operation difficulty of the doctor, and also increase the success rate of the operation.

Claims

1. A guide extension catheter that can be fixed to a guide catheter, the rear end of the guide extension catheter is connected to a push assembly through a connecting catheter, and the guide catheter is sleeved outside the guide extension catheter, characterized in that: A balloon catheter is sleeved on the guide extension catheter, and the balloon catheter is arranged between the guide catheter and the guide extension catheter. The balloon catheter includes a first anchoring balloon, a second anchoring balloon and a connecting channel connecting the first anchoring balloon and the second anchoring balloon. The first anchoring balloon is arranged on the outer wall of the front end of the guide extension catheter, and the second anchoring balloon is arranged on the outer wall of the rear end of the guide extension catheter; one end of the connecting catheter is inserted into the wall of the rear end of the guide extension catheter and is connected to the balloon catheter, and the other end of the connecting catheter is connected to a pushing assembly, and a pressure pump is connected to the pushing assembly.

2. A guide extension catheter that can be fixed to a guide catheter as claimed in claim 1, characterized in that: The guide extension catheter is provided with a protection ring, and the protection ring is arranged between the balloon catheter and the guide extension catheter.

3. A guide extension catheter that can be fixed to a guide catheter as claimed in claim 2, characterized in that: The protection ring is a stainless steel ring.

4. A guide extension catheter that can be fixed to a guide catheter as claimed in claim 1, characterized in that: The connecting catheter is provided with a valve for controlling the gas in the connecting catheter to flow to the balloon catheter.

5. The guide extension catheter that can be fixed to the guide catheter as claimed in claim 1, characterized in that: The inner diameter of the guide extension catheter is 1.4 mm, and the outer diameter of the guide extension catheter is 1.7 mm.

6. A guide extension catheter that can be fixed to a guide catheter as claimed in claim 4, characterized in that: The guide extension catheter comprises a polymer material layer, a reinforcement layer and a PTFE inner layer from outside to inside, the polymer material layer is coated with a hydrophilic coating, and the reinforcement layer is a metal reinforcement layer or a fiber reinforcement layer.

7. The guide extension catheter that can be fixed to the guide catheter as claimed in claim 1, characterized in that: The outer surfaces of the guide extension catheter and the balloon catheter are provided with anti-coagulation coatings.

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