Catheter device for subsection bronchial lavage
By designing a subsegmental bronchial lavage catheter device, which combines an inner catheter and a basket mechanism, the problems of inaccurate positioning and insufficient suction in existing technologies have been solved, achieving precise lavage and efficient cell collection, and improving the diagnostic accuracy of peripheral pulmonary nodules.
Patent Information
- Application Number
- CN202422603157.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2034-10-25
Smart Images
Figure CN223914165U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of medical auxiliary supplies, and particularly relates to a catheter device for sub-segment bronchial lavage. BACKGROUND
[0002] With the wide application of chest CT scanning, the discovery rate of peripheral lung nodules, especially early-stage cancer, shows a rising trend year by year; however, for small nodular lesions in the lung, the diagnostic accuracy of imaging methods is limited (50-80%).
[0003] For peripheral lung nodules, although there are related cases of lung nodule puncture biopsy or ablation therapy under magnetic navigation guidance, more clinical reliance is on CT-guided lung puncture and surgical minimally invasive surgery (pulmonary wedge resection under thoracoscope assistance), which has the functions of diagnosis and treatment.
[0004] The main shortcomings of puncture biopsy under magnetic navigation guidance are: a special magnetic navigation device is needed, which is expensive; the required consumables are also expensive; the main shortcomings of CT-guided puncture biopsy are: greatly affected by respiration, difficult to accurately position, high false negative rate, and high incidence of complications such as pneumothorax and hemothorax; the main shortcomings of surgical minimally invasive surgery are: need to be performed in the operating room, high cost, high preoperative and postoperative management cost, and certain impact on lung function after surgery.
[0005] Therefore, for small lung nodules, the current method is to use regular CT follow-up, and then perform CT-guided puncture diagnosis when the nodule or tumor grows, which may lead to delayed disease; for lesions in specific positions (such as paratracheal, close to the pleura, etc.), CT is difficult to guide the puncture needle to accurately reach the lesion.
[0006] The human bronchial tree is composed of trachea-left and right main bronchus (including right middle bronchus)-lobar bronchus-segmental bronchus-sub-segmental bronchus-bronchiole-alveolar duct-alveolus; trachea-left and right main bronchus (including right middle bronchus)-lobar bronchus-segmental bronchus opening lesions can be observed by bronchoscopy. However, due to the current limitation of bronchoscope diameter, sub-segmental bronchus-alveolar lesions are difficult to observe under bronchoscopy.
[0007] Since peripheral pulmonary nodules are mostly derived from the terminal bronchio-alveolar epithelium (a small part occurs in the alveolar interstitium), in the case that the peripheral nodules are difficult to be directly observed through bronchoscopy, a sub-segment bronchial lavage method is usually used to expect to recover the exfoliated cells containing the lesion alveolar part, so as to obtain a diagnosis. The current sub-segment bronchial lavage method is as follows: through a bronchoscope, enter to the lesion sub-segment, then through a bronchoscopic biopsy forceps channel, inject and lavage, then perform negative pressure suction, and finally send the suctioned exfoliated liquid to cytological examination. The main defects of the method in the prior art are as follows: 1) poor positioning specificity; 2) after lavage, there is no special negative pressure suction device, and too little liquid is suctioned; 3) there is a possibility that exfoliated cells from other parts are also suctioned and sent for examination. Practical new content
[0008] The main purpose of the present application is to provide a catheter device for sub-segment bronchial lavage with positioning and plugging functions.
[0009] In order to achieve the above main purpose, the present application provides a catheter device for sub-segment bronchial lavage, which comprises an inner catheter for lavage liquid injection and suction and a basket mechanism for plugging and positioning, the basket mechanism is arranged on the outer side of the front end of the inner catheter.
[0010] The basket mechanism comprises a basket body on the inner side and a film sleeve on the outer side, and the basket body and the film sleeve are arranged in a radial stacking manner along the inner catheter; the basket body is woven by a plurality of filament bodies, and at least part of the filament bodies are shape memory alloy wires.
[0011] According to a specific embodiment of the present application, the catheter device further comprises an outer sleeve; the outer sleeve is sleeved on the outside of the inner catheter and makes the basket mechanism fold between the outer sleeve and the inner catheter; the outer sleeve is slidingly arranged on the inner catheter, and when the outer sleeve slides backward, the basket mechanism can automatically open to form a balloon shape.
[0012] Further, the outer sleeve is provided with a handle.
[0013] Specifically, the inner catheter is provided with a limiting part for sliding limiting the handle.
[0014] Further, the outer sleeve is a tubular body made of PTFE material.
[0015] According to a specific embodiment of the present application, the rear end of the inner catheter is provided with a connecting joint.
[0016] According to a specific embodiment of the present application, the inner catheter is a tubular body made of PA material.
[0017] According to a specific embodiment of the present application, the shape memory alloy is a nickel-titanium shape memory alloy.
[0018] According to the specific embodiment of the utility model, the film sleeve is a sleeve-shaped body made of elastic rubber material.
[0019] According to the specific embodiment of the utility model, the net basket mechanism further comprises a metal fixing ring, and the front and rear ends of the net basket body and the film sleeve are connected to the inner catheter through the metal fixing ring.
[0020] The utility model has the following beneficial effects:
[0021] In the utility model, when the net basket mechanism is folded, the pipe diameter is small to facilitate operation; when the net basket mechanism is opened, the sub-segment bronchus can be effectively blocked to form a blocking positioning; after the inner catheter is fixed through the net basket mechanism, the inner catheter can be used to inject the lavage fluid into the target sub-segment bronchus to the maximum extent, and then negative pressure suction is performed to obtain the lung tissue exfoliated cells of the sub-segment bronchus where the lung peripheral nodules are located in a maximum amount and accurately. The utility model can realize the positioning and blocking effect of the specified position in the sub-segment bronchus, and has the advantages of convenient operation and high practicability.
[0022] In the utility model, when the outer sleeve slides backward, the net basket body in the net basket mechanism can be automatically opened, and the function of blocking can be achieved without inflation.
[0023] The utility model will be further described in detail below with reference to the drawings. DRAWINGS
[0024] Figure 1 It is the overall structure diagram of the embodiment 1 of the utility model, and
[0025] Figure 2 It is the enlarged schematic view of the front end of the inner catheter in the embodiment 1 of the utility model, and
[0026] Figure 3 It is the enlarged schematic view of the rear end of the inner catheter in the embodiment 1 of the utility model, and
[0027] Figure 4 It is the model schematic view when the net basket mechanism is opened in the embodiment 1 of the utility model. DETAILED DESCRIPTION
[0028] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other without conflict.
[0029] In the following description, many specific details are set forth in order to provide a thorough understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, therefore, the protection scope of the utility model is not limited to the specific embodiments disclosed below.
[0030] Example 1
[0031] like Figure 1 As shown, this embodiment provides a catheter device for subsegmental bronchial lavage, including an inner catheter 10, an outer tube 20, and a basket mechanism 30. The inner catheter 10 is used for injecting and aspirating lavage fluid, the basket mechanism 30 is used for sealing and positioning during use, and the outer tube 20 is used to release the constraint on the basket mechanism 30, thereby triggering the basket mechanism 30 to open automatically. Figure 1 The left image shows the basket mechanism 30 in a folded state under the action of the outer tube 20. Figure 1 The middle right figure shows the outer tube 20 releasing its constraint on the basket mechanism 30, with the basket mechanism 30 in an open position.
[0032] like Figure 2 As shown, the basket mechanism 30 is disposed on the outer side of the front end of the inner conduit 10, and includes a basket body 31 located on the inner side and a thin film sleeve 32 located on the outer side. The basket body 31 and the thin film sleeve 32 are stacked radially along the inner conduit 10. The basket body 31 is formed by weaving multiple filaments. In this embodiment, the filaments are shape memory alloy wires, preferably nickel-titanium shape memory alloys. In other embodiments, filaments made of other materials (such as polymer materials) can also be mixed and woven with shape memory alloys.
[0033] Furthermore, the outer tube 20 is sleeved on the outside of the inner tube 10, causing the basket mechanism 30 to fold between the outer tube 20 and the inner tube 10; the outer tube 20 is slidably disposed on the inner tube 10, and when the outer tube 20 slides backward, the basket mechanism 30 can automatically open to form a balloon shape. Preferably, the maximum diameter of the balloon formed when the basket mechanism 30 opens is 20mm-25mm.
[0034] like Figure 3 As shown, the outer tube 20 has a handle 21 at its rear end, and the inner tube 10 has a connecting joint 11 at its rear end. Preferably, the inner tube 10 has a limiting part 12 for sliding and limiting the handle 21. The limiting part 12 is specifically provided on the connecting joint 11, for example, limiting the handle 21 in a stepped manner.
[0035] Please continue reading. Figure 2 The basket mechanism 30 also includes two metal fixing rings 33. The front and rear ends of the basket body 31 and the film sleeve 32 are connected to the inner guide tube 10 through the metal fixing rings 33. For example, the connection of the metal fixing rings 33, the basket body 31, the film sleeve 32 and the inner guide tube 10 is fixed by adhesive bonding.
[0036] Specifically, the metal retaining ring 33 is preferably made of platinum-iridium alloy. The metal retaining ring 33 is opaque to X-rays and can be used for imaging.
[0037] In the embodiment, the inner conduit 10 is preferably a tubular body made of PA material, the tube diameter of the inner conduit 10 is preferably more than 1 mm, and the length is preferably more than 80 cm; the outer sleeve 20 is preferably a tubular body made of PTFE material, the tube diameter of the outer sleeve 20 is preferably not more than 2 mm, and the length is determined according to the length of the inner conduit 10; the film sleeve 32 is preferably a sleeve-shaped body made of elastic rubber material (TPU, thickness about 0.02 mm), when the net basket body 31 is opened, the film sleeve 32 is adaptively opened, as shown in the figure. Figure 4
[0038] In the embodiment, the inner conduit 10 is communicated with the one-way valve through the connecting joint 11 to inject the lavage liquid, wherein the front end of the inner conduit 10 is positioned to the specified position in the sub-segment bronchus through the opened net basket mechanism 30, and the sealing effect is formed, so that the overflow of the lavage liquid can be prevented during the lavage, and more amount of the lavage liquid (containing more exfoliated cells) can be sucked during the negative pressure suction, and the secretion of the adjacent bronchus or the sub-segment bronchus can be prevented from being inhaled by mistake, and the possibility of misdiagnosis can be reduced.
[0039] Although the utility model is disclosed as above with the preferred embodiment, it is not used to limit the range of the utility model implementation. Any ordinary skilled person in the art can make some improvements without departing from the scope of the utility model, that is, any equivalent improvement made according to the utility model should be covered by the scope of the utility model.
Claims
1. A catheter device for sub-segmental bronchial lavage, characterized by: The inner catheter is provided with an inner catheter for lavage liquid injection and suction, and a basket mechanism for blocking and positioning, which is arranged outside the front end of the inner catheter; The basket mechanism comprises a basket body on the inner side and a film sleeve on the outer side, and the basket body and the film sleeve are arranged in a radial direction of the inner catheter; the basket body is woven by a plurality of filament bodies, and at least part of the filament bodies are shape memory alloy wires.
2. The catheter device for subsegmental bronchial lavage of claim 1, wherein: Further comprising an outer sleeve, the outer sleeve is sleeved outside the inner catheter and makes the basket mechanism fold between the outer sleeve and the inner catheter; the outer sleeve is slidingly arranged on the inner catheter, and when the outer sleeve slides backward, the basket mechanism can be automatically opened to form a balloon shape.
3. The catheter device for subsegmental bronchial lavage of claim 2, wherein: The outer sleeve is provided with a handle.
4. The catheter device for subsegmental bronchial lavage of claim 3, wherein: The inner catheter is provided with a limiting part for sliding limiting the handle.
5. The catheter device for subsegmental bronchial lavage of claim 2, wherein: The outer sleeve is a tubular body made of PTFE material.
6. The catheter device for subsegmental bronchial lavage of claim 1, wherein: The rear end of the inner catheter is provided with a connecting joint.
7. The catheter device for subsegmental bronchial lavage of claim 1, wherein: The inner catheter is a tubular body made of PA material.
8. The catheter device for subsegmental bronchial lavage of claim 1, wherein: The shape memory alloy is a nickel-titanium shape memory alloy.
9. The catheter device for subsegmental bronchial lavage of claim 1, wherein: The film sleeve is a sleeve-shaped body made of elastic rubber material.
10. The catheter device for subsegmental bronchial lavage of claim 1, wherein: The basket mechanism further comprises a metal fixing ring, and the front and rear ends of the basket body and the film sleeve are connected to the inner catheter through the metal fixing ring.