Medical wire and fiber delivery control device compatible with magnetic field in narrow space

Abstract

The invention discloses a magnetic-field-compatible medical wire and fiber delivery control device in a narrow space. The magnetic-field-compatible medical wire and fiber delivery control device comprises a lining, a displacement control assembly and a direction control balloon. The displacement control assembly comprises a displacement sliding block and a displacement control balloon, the displacement control balloon is circumferentially fixed to the inner wall of the near end of the lining and wraps the outer walls of the two ends, in the axial direction of the lining, of the displacement sliding block in a surrounding mode, and the displacement of the displacement sliding block is controlled through different filling states of the displacement control balloon at different positions; the direction control balloon is circumferentially fixed to the inner wall of the far end of the lining and wraps the outer wall of the far end of the medical wire fiber in a surrounding mode, and the bending state of the medical wire fiber is controlled through different filling states of the direction control balloon in different directions; and the displacement sliding block is used for loading medical wires and fibers. According to the device, the bending state and the delivery depth of the far end of the medical wire fiber can be accurately controlled by controlling different filling states of different balloons, a mechanical structure based on the electric control principle does not need to be adopted, and good magnetic field compatibility is achieved.

Description

Technical Field

[0001] The present invention relates to the field of minimally invasive surgical instruments, and in particular to a medical fiber delivery control device compatible with a magnetic field in a narrow space. Background Art

[0002] In the field of modern medicine, the development of minimally invasive surgical technology has put forward higher requirements for medical devices, especially when performing surgery in narrow spaces, such as middle ear surgery through the external auditory canal, laser stapes floor fenestration, ear scar removal; nasal cavity and paranasal sinus lesion cleaning and treatment through the anterior nares; laryngeal vocal cord polyp removal through the oropharynx, etc., which require the ability to accurately deliver medical fibers (such as laser optical fibers, capillary suction tubes, or medical electrode probes, etc.) in narrow spaces to achieve accurate treatment or diagnosis. However, the delivery of existing medical fibers relies on the operator holding them or using a mechanical structure based on the principle of electrical control, which has the following shortcomings:

[0003] (1) In minimally invasive surgery, medical fibers are very small, making it difficult to achieve precise delivery and distal direction control through direct manual manipulation, which can easily lead to large errors and affect the accuracy and efficiency of the surgery.

[0004] (2) The mechanical structure based on the electric control principle has magnetic field compatibility problems in the magnetic field of magnetic resonance imaging (MRI), which makes it difficult to achieve remote operation under magnetic navigation or magnetic resonance guidance. Summary of the invention

[0005] The purpose of the present invention is to provide a device for narrow space surgery, which can achieve precise control of the bending direction, bending degree and delivery depth of the distal end of the medical fiber, and the device can meet the application requirements in a magnetic field environment.

[0006] In order to achieve the above-mentioned object, the present invention provides a medical fiber delivery control device in a narrow space and compatible with a magnetic field, comprising a sleeve, a displacement control component and a plurality of direction control balloons arranged inside the sleeve; the displacement control component comprises: a displacement slider and a plurality of displacement control balloons, wherein:

[0007] The displacement control balloon is circumferentially fixed to the inner wall of the proximal end of the bushing, and surrounds and covers the outer walls of the displacement slider at both ends of the bushing in the axial direction, and controls the displacement of the displacement slider in the axial direction of the bushing through different filling states of the displacement control balloon at different positions;

[0008] The direction control balloon is circumferentially fixed to the inner wall of the distal end of the bushing, and surrounds and covers the outer wall of the distal end of the medical wire fiber, and controls the bending state of the medical wire fiber through different filling states of the direction control balloon in different directions;

[0009] The displacement slider is provided with a loading slot for loading the medical fiber.

[0010] Furthermore, it also includes a limiting balloon, which is located at both ends of the displacement control component in the axial direction of the bushing. The limiting balloon always remains in a fully filled state and is used to limit the axial displacement of the displacement slider.

[0011] Furthermore, the direction control balloons are distributed at equal intervals in the circumferential direction of the inner wall of the bushing.

[0012] Furthermore, the displacement control balloons are distributed at equal intervals in the circumferential direction of the inner wall of the bushing.

[0013] Furthermore, the bushing is composed of an upper bushing and a lower bushing which can be detachably assembled.

[0014] Furthermore, the loading slot of the displacement slider is also provided with a snap-fit ​​fixing member for fixing part of the medical fiber inside the loading slot.

[0015] Furthermore, the bending state of the medical fiber includes the bending direction of the medical fiber.

[0016] Furthermore, the medical fiber includes any one of an optical fiber and a medical electrode.

[0017] Furthermore, the diameter of the medical fiber is 0.1 mm to 1 mm.

[0018] Furthermore, the diameter of the bushing is 1 mm to 10 mm.

[0019] Compared with the prior art, the beneficial effects of the present invention at least include:

[0020] The medical fiber delivery control device of the present invention includes a sleeve and a displacement control assembly and a plurality of direction control balloons arranged inside the sleeve; the displacement control assembly includes a displacement slider and a plurality of displacement control balloons, and by controlling different filling states of different direction control balloons and different displacement control balloons, the bending state of the distal end of the medical fiber and the delivery depth can be precisely controlled. On the one hand, the middle part of the medical fiber is loaded and fixed in the displacement slider, and the displacement control balloon can control the displacement of the displacement control assembly in the axial direction inside the sleeve, thereby driving the axial movement of the medical fiber inside the sleeve; on the other hand, the bending state of the distal end of the medical fiber can be controlled by the direction control balloon. The present invention realizes the simultaneous control of the bending state and delivery depth of the distal end of the medical fiber, improves the accuracy and efficiency of the operation, and does not require the use of a mechanical structure based on the principle of electric control, thereby improving the magnetic field compatibility.

[0021] Furthermore, in the displacement control assembly of the present invention, the limiting balloon always remains fully filled, so that the displacement slider can only move axially between the limiting balloons provided at both ends of the displacement control assembly, effectively preventing excessive delivery of the medical fiber, thereby further improving the accuracy of the delivery depth of the distal end of the medical fiber.

[0022] Furthermore, the sleeve of the present invention is a detachable structure, and the installation of medical fibers and the like can be performed by opening the upper sleeve, thereby facilitating the installation and replacement of the medical fibers and further improving the efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an axial cross-sectional view of the medical fiber delivery control device of the present invention; wherein area A represents the displacement control section of the bushing, and area B represents the direction control section of the bushing.

[0024] Figure 2 It is a schematic structural diagram of the displacement slider of the present invention.

[0025] Figure 3 It is a transverse cross-sectional view of the displacement control section of the medical fiber delivery control device of the present invention.

[0026] Figure 4 It is a transverse cross-sectional view of the direction control section of the medical fiber delivery control device of the present invention.

[0027] Description of the accompanying drawings:

[0028] Bushing 10, upper bushing 11, lower bushing 12, displacement control section A, direction control section B,

[0029] The displacement control assembly 20, the displacement slider 21, the loading slot 211, the buckle fixing member 212, the displacement control balloon 22, the first group of displacement control balloons 221, the second group of displacement control balloons 222,

[0030] The limiting balloon 30, the first group of limiting balloons 31, the second group of limiting balloons 32,

[0031] direction control balloon 40, first direction control balloon 41, second direction control balloon 42, third direction control balloon 43,

[0032] Medical fiber 50. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The diameter of the "narrow space" described in this article is 1 mm to 10 mm.

[0037] The “distal end” mentioned herein refers to a direction close to the inside of the patient's body cavity, and the “proximal end” mentioned herein refers to a direction close to the operator.

[0038] The "axial direction" described herein refers to a direction parallel to the central axis of the bushing.

[0039] The "delivery depth" described herein refers to the distance that the distal end of the medical wire extends from the distal end of the sleeve.

[0040] As described in the background technology, for minimally invasive surgery, the existing medical fiber delivery methods have problems such as low control accuracy of the distal bending direction and delivery depth, and insufficient magnetic field compatibility, which cannot meet the strict requirements for accuracy and safety in surgery.

[0041] In order to solve the above problems, the present invention provides a small medical fiber delivery control device that is compatible with a magnetic field in a narrow space. The device adopts a balloon control method inside the device, and controls the filling state of the balloon by filling or discharging the fluid in different balloons, thereby generating pressure on the distal end of the medical fiber and / or the displacement slider that is in conflict with the balloon, so that the distal end of the medical fiber bends and promotes the axial movement of the displacement slider. Since the medical fiber is partially fixed in the displacement slider, the medical optical fiber can move with the axial movement of the displacement slider, thereby achieving the control of the bending state and delivery depth of the distal end of the medical fiber, thereby improving the accuracy and efficiency of the operation.

[0042] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings.

[0043] Figure 1 The axial cross-sectional schematic diagram of the medical fiber delivery control device (hereinafter referred to as "the device") provided by the present invention is shown. The medical fiber 50 includes but is not limited to any one of an optical fiber and a medical electrode, and the diameter of the medical fiber 50 is 0.1 mm to 1 mm.

[0044] The device includes a sleeve 10, a displacement control assembly 20 and a plurality of direction control balloons 40 disposed inside the sleeve 10; the displacement control assembly 20 includes a displacement slider 21 and a plurality of displacement control balloons 22. The outer diameter of the sleeve 10 is 1 mm to 10 mm, so as to be suitable for surgery in a narrow space.

[0045] Specifically, the displacement control balloon 22 is circumferentially fixed to the inner wall of the proximal end of the bushing 10 to form a displacement control section A inside the bushing 10. The displacement control balloon 22 surrounds and covers the outer walls of the displacement slider 21 at both ends of the bushing 10 in the axial direction, and controls the displacement of the displacement slider 21 in the axial direction of the bushing 10 through different filling states of the displacement control balloon 22 at different positions.

[0046] The direction control balloon 40 is circumferentially fixed to the inner wall of the distal end of the sleeve 10 to form a direction control section B inside the sleeve 10. The direction control balloon 40 surrounds and covers the outer wall of the distal end of the medical wire 50, and controls the bending state of the distal end of the medical wire 50 through different filling states of the direction control balloon 40 in different directions, and the bending state includes the bending direction and / or bending degree.

[0047] The displacement slider 21 is provided with a loading slot 211 for loading the medical wire 50, see Figure 2 . In this embodiment, the overall structure of the displacement slider 21 is spindle-shaped, octahedral-like. A groove is etched downward at the top of the displacement slider 21 to form a loading slot 211 for the medical fiber 50, and the cross-sectional width of the loading slot 211 matches the diameter of the medical fiber 50. A snap-fit ​​fixture 212 is also provided at the top of the loading slot 21. The cavity formed between the snap-fit ​​fixture 212 and the loading slot 211 is used to load the medical fiber 50. The snap-fit ​​fixture 212 is used to limit and fix the medical fiber 50, so that when the displacement slider 21 moves axially, the medical fiber 50 can be driven to move axially accordingly.

[0048] In some embodiments, each displacement control balloon 22 and each direction control balloon 40 are fixed to the inner wall of the sleeve 10 by pasting, and each displacement control balloon 22 and each direction control balloon 40 can flow in or out of a fluid through a set of catheters (not shown) to change the filling state of the displacement control balloon 22 and the direction control balloon 40, and the fluid includes but is not limited to any one of gas and liquid. In this embodiment, the catheter can be attached to the inner wall of the sleeve 10, and extend along the inner wall of the sleeve 10 to the outside of the sleeve 10, and connected to an external air pump, and the air pump is used to pump air into or out of the displacement control balloon 22 and the direction control balloon 40 to control the filling state (size and pressure state) of the balloon.

[0049] The device controls the bending state and delivery depth of the distal end of the medical wire 50 by adjusting the filling state of different balloons, thereby achieving excellent magnetic field compatibility. This is different from traditional medical wire delivery control devices, which usually use mechanical structures based on electric control principles (such as motors) to drive the bending and movement of medical wires. However, the mechanical structure usually contains metal or magnetic materials, which are easily disturbed in a magnetic field environment, which may cause device failure or pose a threat to the safety of the patient's surgical area.

[0050] Figure 3The figure shows a transverse cross-sectional view of the displacement control section A of the bushing 10 described in the present embodiment. The number of the displacement control balloons 22 can be designed according to the actual required delivery depth of the medical fiber 50. In the present embodiment, the displacement control assembly 20 is provided with two groups of displacement control balloons 22, which are respectively referred to as the first group of displacement control balloons 221 and the second group of displacement control balloons 222 from the distal end to the proximal end. The number of displacement control balloons 22 in each group is four, and each group of displacement control balloons 22 is arranged at the same cross-section of the inner wall of the displacement control section A, and the four displacement control balloons 22 in each group are evenly spaced in the circumferential direction of the cross-section. See FIG. Figure 1 , the first group of displacement control balloons 221 and the second group of displacement control balloons 222 surround and cover the outer walls of the displacement slider 21 at both ends in the axial direction of the bushing 10. As an example, when the internal gas of the first group of displacement control balloons 221 is discharged and the second group of displacement control balloons 222 are inflated, the first group of displacement control balloons 221 becomes smaller and the second group of displacement control balloons 222 becomes larger, applying pressure toward the distal end to the displacement slider 21, so that the displacement slider 21 moves axially toward the distal end, thereby driving the medical fiber 50 to move axially toward the distal end. By gradually controlling the inflation or exhaust volume of different groups of displacement control balloons 22, the axial displacement distance of the medical fiber 50 inside the bushing 10 is controlled, thereby enabling the medical fiber 50 to gradually reach the required delivery depth according to surgical requirements.

[0051] In this embodiment, the device further includes two groups of limiting balloons 30, which are respectively recorded as the first group of limiting balloons 31 and the second group of limiting balloons 32 from the distal end to the proximal end, and both are always kept in a fully filled state, limiting the axial displacement distance of the displacement slider 21, so that the displacement slider 21 can only move axially between the first group of limiting balloons 31 and the second group of limiting balloons 32, thereby preventing excessive delivery or withdrawal of the medical fiber 50. This design effectively maintains the position stability of the displacement slider 21, and allows the operator to finely adjust the axial displacement distance of the medical fiber 50 to meet different surgical requirements.

[0052] Figure 4The transverse cross-sectional view of the direction control section B of the bushing 10 in this embodiment is shown. In this embodiment, three direction control balloons 40 are provided on the inner wall circumference of the proximal end of the bushing 10, which are respectively recorded as the first direction control balloon 41, the second direction control balloon 42, and the third direction control balloon 43. The three direction control balloons 40 surround and cover the outer wall of the distal end of the medical fiber 50, and contact the surface of the medical fiber 50. The three direction control balloons 40 are evenly spaced and distributed on the same cross-section of the inner wall of the direction control section B in the circumferential direction, ensuring that the medical fiber 50 is balanced in the circumferential direction and avoiding local stress concentration that causes damage to the medical fiber 50. As an example, when the filling states of the three direction control balloons 40 are consistent, the distal end of the medical fiber 50 is subjected to the same pressure in the corresponding directions of the three direction control balloons 40, and at this time, the distal end of the medical fiber 50 is at the central axis position of the direction control section B. As another example, when the filling state of the first direction control balloon 41 and the third direction control balloon 43 is kept unchanged, and the second direction control balloon 42 is continuously inflated, the second direction control balloon 42 becomes larger, and the distal end of the medical wire 50 is subjected to upward pressure from the second direction control balloon 42, so that the distal end of the medical wire 50 bends upward. Therefore, by controlling the inflation amount or exhaust amount of the direction control balloon 40 in different directions, the bending direction and / or bending degree of the distal end of the medical wire 50 can be precisely controlled.

[0053] It can be understood that the medical fiber 50 has a certain rigidity due to its own material properties, such as the optical fiber mainly made of quartz glass, which can provide certain support for its shape. In minimally invasive surgery, the distance that the distal end of the medical fiber 50 extends from the sleeve 10 is relatively short, only 3mm to 5mm. Therefore, when the distal end of the medical fiber 50 extends from the distal end of the sleeve 10 between the direction control balloon 40, the distal end of the medical fiber 50 can still maintain an ideal bending state, thereby still providing precise guidance for the operation.

[0054] Continue to see Figure 1 , Figure 3 and Figure 4 In this embodiment, the bushing 10 is composed of an upper bushing 11 and a lower bushing 12 that can be detachably assembled. As an example, when the upper bushing 11 is opened, the displacement control balloon 22 and the direction control balloon 40 are pasted on the inner walls of the upper bushing 11 and the lower bushing 12, the displacement slider 21 is inserted between the displacement control balloons 22, and then the medical wire 50 is installed in the loading slots 211 of the direction control balloon 40 and the displacement slider 21. This design allows the medical wire 50 to extend into the interior of the bushing 10 without extending from the proximal opening of the bushing 10, thereby reducing the difficulty of installing and replacing the medical wire 50 and further improving the efficiency of the operation.

[0055] In some embodiments, a lubricating liquid is coated on the surface of the displacement slider 21 so that the displacement slider 21 can move smoothly in the axial direction inside the bushing 10 when pushed by the displacement control balloon 22 .

[0056] In some embodiments, the device is used in conjunction with an endoscope to observe in real time the bending state of the distal end of the medical fiber 50 and the delivery depth of the distal end of the medical fiber 50, so as to adjust in real time the filling state of the directional control balloon 40 and the displacement control balloon 22 in different positions or directions, thereby achieving the ability to gradually adjust the distal end of the medical fiber 50 to accurately reach the target area.

[0057] The method of using the medical fiber delivery control device of the present invention is as follows: open the upper sleeve, paste the direction control balloon and the displacement control balloon on the inner wall of the lower sleeve, connect the catheter of each balloon with a fluid pump; insert a displacement slider between each displacement control balloon, fix the middle of the medical fiber required for the operation in the loading slot of the displacement slider, place the distal end of the medical fiber between each direction control balloon, and cover the upper sleeve. The operator holds the device close to the patient's lesion, controls the fluid pump to pump fluid into or out of different displacement control balloons, and finely adjusts the filling state of different displacement control balloons, thereby pushing the displacement slider to move a set distance to the distal end, and then drives the medical fiber to accurately deliver a set depth to the distal end; the operator controls the fluid pump to pump fluid into or out of different direction control balloons, and finely adjusts the filling state of different direction control balloons, so that the distal end of the medical fiber bends along the target direction. When used in conjunction with an endoscope, the operator observes and adjusts the sizes of different balloons in real time, thereby adjusting the bending state of the distal end of the medical fiber and the delivery depth of the distal end of the medical fiber in real time, ultimately allowing the medical fiber to accurately reach the target area.

[0058] In summary, the present invention provides a medical fiber delivery control device that is compatible with a magnetic field in a narrow space. The device can accurately control the bending and movement of the medical fiber by controlling the different filling states of the balloons in the direction control section and the displacement control section. The bending state of the distal end of the medical fiber is controlled by the direction control balloon, while the middle part is fixed in the displacement slider, and the displacement control balloon controls the axial movement of the displacement slider in the sleeve to achieve the axial delivery of the medical fiber. This device design not only improves the accuracy and efficiency of the surgery, but also enhances the magnetic field compatibility because it does not require the use of a mechanical structure based on the principle of electrical control, providing a new solution for minimally invasive surgery in a narrow space.

[0059] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A medical fiber delivery control device compatible with magnetic fields in narrow spaces, characterized in that: It includes a bushing, a displacement control component and a plurality of direction control balloons arranged inside the bushing; the displacement control component includes: a displacement slider and a plurality of displacement control balloons, wherein: The displacement control balloon is circumferentially fixed to the inner wall of the proximal end of the bushing, and surrounds and covers the outer walls of the displacement slider at both ends of the bushing in the axial direction, and controls the displacement of the displacement slider in the axial direction of the bushing through different filling states of the displacement control balloon at different positions; The direction control balloon is circumferentially fixed to the inner wall of the distal end of the bushing, and surrounds and covers the outer wall of the distal end of the medical wire fiber, and controls the bending state of the medical wire fiber through different filling states of the direction control balloon in different directions; The displacement slider is provided with a loading slot for loading the medical fiber.

2. The magnetic field compatible medical fiber delivery control device in a narrow space as claimed in claim 1, characterized in that: It also includes a limiting balloon, which is located at both ends of the displacement control component in the axial direction of the bushing. The limiting balloon always remains in a fully filled state and is used to limit the axial displacement of the displacement slider.

3. The magnetic field compatible medical fiber delivery control device in a narrow space as claimed in claim 1, characterized in that: The direction control balloons are distributed at equal intervals in the circumferential direction of the inner wall of the sleeve.

4. The narrow space, magnetic field compatible medical fiber delivery control device according to claim 1, characterized in that: The displacement control balloons are distributed at equal intervals in the circumferential direction of the inner wall of the bushing.

5. The magnetic field compatible medical fiber delivery control device in a narrow space as claimed in claim 1, characterized in that: The bushing is composed of an upper bushing and a lower bushing which can be detachably assembled.

6. The magnetic field compatible medical fiber delivery control device in a narrow space as claimed in claim 1, characterized in that: The loading slot of the displacement slider is also provided with a snap-fit ​​fixing piece for fixing part of the medical fiber inside the loading slot.

7. The magnetic field compatible medical fiber delivery control device in a narrow space as claimed in claim 1, characterized in that: The bending state of the medical wire fiber includes the bending direction of the medical wire fiber.

8. The magnetic field compatible medical fiber delivery control device in a narrow space as claimed in claim 1, characterized in that: The medical fiber includes any one of an optical fiber and a medical electrode.

9. The magnetic field compatible medical fiber delivery control device in a narrow space as claimed in claim 1, characterized in that: The diameter of the medical fiber is 0.1 mm to 1 mm.

10. The magnetic field compatible medical fiber delivery control device in a narrow space as claimed in claim 1, characterized in that: The diameter of the bushing is 1 mm to 10 mm.

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