CN114533211A

CN114533211A - Medical catheter and medical device

Info

Publication number: CN114533211A
Application number: CN202011347019.5A
Authority: CN
Inventors: 王幸敏; 王雄伟; 朱鑫建; 黄基锐
Original assignee: Microport Urocare Jiaxing Co Ltd; Microport Urocare Shanghai Co Ltd
Current assignee: Microport Urocare Jiaxing Co Ltd; Microport Urocare Shanghai Co Ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2022-05-27
Also published as: WO2022111106A1

Abstract

The invention relates to a medical catheter and a medical device, wherein the medical catheter comprises a first main body section, a first bending section and a first head section, the first main body section is provided with a first passage, at least one second passage and at least one third passage, the first passage is used for allowing a medical device to penetrate in and out, the second passage is used for allowing a medium to flow in or allowing a circuit to pass in, and the third passage is used for allowing a traction line to be arranged. The medical device comprises the medical catheter, an outer tube and a handle, wherein the outer tube and the handle are matched with the medical catheter for use, under the condition that the outer diameter of the first main body section is not changed, the inner diameter of the first passage is enlarged, the sectional area of the first passage is increased by 1 time, so that the biopsy forceps with the outer diameter of 1.5mm can be used in the first passage, the biting force of the biopsy forceps is increased, the sampling amount is greatly increased, the sampling frequency is reduced, and the use range of the instrument is enlarged.

Description

Medical catheter and medical device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a medical catheter and a medical device.

Background

Cholecystoscope (cholecystoscope) and cholecystoscope technology are widely applied clinically, become one of the most important diagnostic tools and treatment methods for liver and biliary tract diseases and special conditions, and become one of the most important minimally invasive technical means for biliary surgery, namely liver surgery. Generally, the choledochoscope technology can be divided into two types, namely artificial channel and natural cavity channel, according to the endoscope advancing path, the former type of artificial channel endoscope advancing path can comprise T-tube sinus, percutaneous transhepatic and intraoperative choledochoscope, and the latter type of natural cavity endoscope advancing path mainly refers to the oral choledochoscope technology.

The choledochoscope is the most classical technique of the oral choledochoscope, and the technique is that firstly, a duodenotomy is performed by using a mother endoscope (duodenoscope), and then a son endoscope (the oral choledochoscope with the diameter of about 3.5 mm) is inserted into a common bile duct from an instrument channel of the mother endoscope, so that examination, tissue biopsy and stone removal treatment of an extrahepatic bile duct can be performed. The technique has the advantages of entering the endoscope along a natural channel, no need of operation, minimal trauma and the like.

The choledochoscope can realize the examination and treatment of the cholepancreatic duct under direct vision, is an important minimally invasive operation which can be completed by following a natural channel, and benefits a large number of patients. However, because two sets of mirrors (a secondary mirror and a primary mirror) need to be matched with each other, the following problems are caused by the combination of the technical principle:

the passage of the sub-scope instrument is too small: at present, the inner diameter of an instrument channel in a sub-scope is only 1.2mm, the instrument channel can only be adapted to a special biopsy forceps, and due to the weak occlusion force and the small sampling amount of the biopsy forceps, the biopsy of a focus is required to be sampled for several times to tens of times, so that the diagnosis accuracy is influenced, and the operation time is prolonged seriously.

Insufficient stability: the distal end of primary mirror hangs near the nipple, because common bile duct axial and the crossing department of duodenum descending part section are the acute angle, the distal end position that the secondary mirror arrived the duodenum descending part must become just can aim at the duodenum nipple after the J type reversal, and the primary mirror distal end does not have the support, influence such as by intestinal peristalsis makes the distal end position of primary mirror easily take place to remove, the head end of the secondary mirror body of taking primary mirror apparatus passageway inside also can shift, and the secondary mirror also can not continue to advance to common bile duct direction because of not having the support, influence operation.

The lighting is insufficient, the space for arranging the light source at the end of the sub-lens is limited, and the light source close to the sub-lens cannot illuminate the stomach in a larger space, so that the operation of independently using the sub-lens to enter the stomach to search pylorus and the like is difficult.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a medical catheter and medical device that solves one or more of the problems of the prior art.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the medical catheter comprises a first main body section, a first bending section and a first head section, wherein the far end of the first main body section is connected with the near end of the first bending section, the far end of the first bending section is connected with the near end of the first head section, the first main body section is provided with at least one first passage, and the first passage is used for configuring a medical instrument to penetrate in and penetrate out.

Furthermore, the medical catheter further comprises at least one second passage and at least one third passage, wherein the second passage is used for flowing media or leading in an electric circuit, and the third passage is used for configuring a pull wire.

Further, the first passage and the second passage of the first main body section are separated from each other, and the first passage is disposed inside the second passage.

Further, the second passage provides the first body segment with an opening that opens along an outer side of the first body segment.

Further, the opening is formed along the axial direction of the first main body section.

Further, the opening is recessed radially toward a center of the first body segment.

Further, the outer side of the first main body section is covered with at least one outer layer structure.

Further, the first passage and the second passage are coaxially arranged.

Further, the first passage and the second passage are arranged non-coaxially.

Further, the inner diameter of the first passage is enlarged to not more than 1.2-2.8mm while the outer diameter of the first body section is constant.

The medical device comprises the medical catheter as claimed in any one of claims 1 to 10, and an outer tube and a handle which are matched with the medical catheter for use, wherein the proximal end of the outer tube is arranged in the handle, the distal end of the outer tube extends out of the handle, the proximal end of the medical catheter is movably connected with the handle, and the distal end of the medical catheter extends into the handle and penetrates through the outer tube.

Compared with the prior art, the invention has the following beneficial technical effects

Under the condition of not changing the outer diameter of the inner tube, the inner diameter of the first passage is enlarged to be not more than 1.8mm, and the sectional area of the first passage is enlarged by 1 time, so that the biopsy forceps with the outer diameter of 1.5mm can be used in the first passage, the biting force of the biopsy forceps is increased, the sampling quantity is greatly increased, the sampling frequency is reduced, and the use range of the instrument is enlarged.

Furthermore, the second channels used as the mounting circuit and the medium are provided with independently used cavities, so that the flow of the medium is larger, and the channels are not influenced mutually.

Further, stability reinforcing, through set up the supporting part in the distal end of second main part section, it is right to utilize the passageway the inside chamber that piles up of supporting part fills into the medium, makes the supporting part inflation and drive whole section outer tube and remove and paste tight intestinal wall, utilizes the supporting part to strut the intestinal space and make the distance increase of inner tube to nipple, provides space and stability for the operation of inner tube.

Furthermore, the head section of the outer tube is provided with a light source, the large stomach space is illuminated by utilizing the light source of the outer tube and matching with the light source of the inner tube, and the problem of insufficient illumination of the stomach space is solved under the condition of not increasing the outer diameter of the inner tube.

Furthermore, the operation difficulty is reduced, the number of the handles is reduced from two original handles to only one handle, a user can operate the handle by one person, the outer pipe bending control mechanism is added in the handle main body, the handle of the forceps lifting device is utilized to drive the rotating disc of the forceps lifting device, the clamp lifting device turntable is endowed with a rotating pair and converts the rotating pair into a moving pair in which a clamp lifting device sliding block moves in a reciprocating manner in a sliding groove of a clamp lifting device sliding plate through a clamp lifting device pull rod, the clamp lifting device sliding block drives the near end of the outer tube to bend through an outer tube pull wire in the moving process, therefore, the proximal end of the outer tube provides a baffle effect when being bent, the advancing direction of the inner tube matched with the outer tube is changed, the original direct viewing direction is changed into a side viewing direction in the process of entering the endoscope to the duodenum, and the inner tube can be aligned to the nipple on the side wall of the descending part of the duodenum and continuously enters the common bile duct.

Furthermore, an inner tube bending control mechanism is arranged in the handle, the inner tube bending control mechanism is provided with two sets of control components, each set of control component respectively controls two pull wires, so that the first bending section of the inner tube can be bent in two directions, and the near end of the inner tube can be bent in four directions by utilizing the two sets of control components, so that the inner tube can enter the stomach from the esophagus through different bending sections and then enter the duodenum through the pylorus.

Furthermore, in the inner pipe bending control mechanism, in order to avoid friction between the lower wheel disc spring piece and the shell or other parts, the inner pipe bending control mechanism is also provided with lower wheel disc spring piece positioning plates, and lower wheel disc spring piece sliding grooves are formed between the lower wheel disc spring piece positioning plates, so that the spring pieces can slide along the sliding grooves. Meanwhile, a wheel disc baffle is further arranged in the inner pipe bending control mechanism to cover the upper wheel disc spring piece positioning plate, so that unnecessary friction caused by contact of an upper wheel disc pull wire and other parts is avoided.

Furthermore, an outer control bending locking mechanism is arranged in the handle, and the outer control bending self-locking mechanism utilizes the downward movement of the spring pin when being pressed, so that the pin head of the spring pin applies pressure to the limiting rod, the limiting rod rotates along the limiting buckle and contacts the caliper lifting turntable, the rotation of the caliper lifting turntable is limited, and the self-locking of the outer pipe at any bending degree is realized.

Furthermore, the handle is internally provided with an inner pipe control bending locking mechanism, and the inner pipe can be locked in any direction of the upper direction, the lower direction, the left direction and the right direction relative to the outer pipe by utilizing the inner pipe control bending self-locking mechanism. The inner pipe bending control locking mechanism is provided with two structures which are respectively arranged outside or inside the handle main body, wherein one structure utilizes a rotating part to enable the locking sheets of the pressure rod part to do relative rotation motion by taking the shaft as the center, so that the far ends of the adjacent locking sheets are relatively closed and respectively hold the upper wheel disc and the lower wheel disc tightly, and the self-locking of the inner pipe in any direction is realized. The other structure is that the rotatory locking knob drives and rotates the stopper rotatory, rotates the stopper and makes after the face rotates thereby fixed stopper receives and realizes axial displacement at the ascending extrusion force of axial, because the back of fixed stopper sets up first locking gasket, and first locking gasket receives the extrusion and is right along the axial the rim plate exerts pressure soon down, the rim plate knob receives the extrusion force to remove down, is removing the in-process first locking gasket internal diameter reduces gradually and embraces the axle head of rim plate tightly down, makes it unable rotation. And meanwhile, the lower wheel disc knob is extruded and then moves axially at the shaft end of the lower wheel disc and contacts with the upper wheel disc knob, so that the inner diameter of the second locking gasket at the upper wheel disc knob is radially contracted and tightly holds the shaft end of the upper wheel disc, the upper wheel disc is locked, and the upper wheel disc and the lower wheel disc are locked.

Furthermore, an inner tube locking mechanism is further arranged in the handle, the inner tube locking mechanism adopts a clamping part to apply pressure to the inner tube through the clamping part after the clamping part rotates through the first rotating part, and can also adopt a rotary structure or a sleeve type structure to lock the inner tube, so that the position of the inner tube relative to the outer tube is fixed, and the inner tube is clamped and loosened.

Furthermore, the disposable endoscope image processor has no cross infection risk, the disposable endoscope image processor can be used as a disposable product, the manufacturing cost of the outer tube is greatly lower than that of the traditional structure, the cost of the whole device is low, and only one set of imaging system and one set of endoscope image processor are matched for use.

Drawings

FIG. 1 shows a front view of a medical catheter and a medical catheter in a medical device according to an embodiment of the invention.

Fig. 2 is a schematic structural diagram of a first head section of a medical catheter in a medical catheter and medical device according to an embodiment of the invention.

Fig. 3 is a partial schematic structural view of a first head section of a medical catheter in a medical catheter and medical device according to an embodiment of the invention.

FIG. 4 illustrates a cross-sectional view of a first body segment of a medical catheter and medical device medical catheter in accordance with an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a first body segment of a medical catheter and medical device medical catheter according to another embodiment of the present invention.

Fig. 6 is a schematic structural view showing a medical catheter and a catheter support portion in a medical device according to an embodiment of the present invention.

FIG. 7 is a cross-sectional view of a medical catheter and medical device in accordance with an embodiment of the present invention showing a second body segment coupled to a support portion.

Fig. 8 is a front view of a medical catheter and a structure of a catheter head section in a medical device according to an embodiment of the present invention.

Fig. 9 is a schematic structural view of a medical catheter and a medical device in a medical device according to an embodiment of the present invention.

Fig. 10 is a schematic view showing the structure of the outer part of the handle of the medical catheter and the medical device according to the embodiment of the invention.

Fig. 11 is a schematic structural diagram of an outer pipe bending mechanism in a medical catheter and a medical device according to an embodiment of the invention.

Fig. 12 is a partial schematic structural view i of an inner tube bending mechanism in a medical catheter and a medical device according to an embodiment of the invention.

Fig. 13 is a partial schematic structural view ii of an inner tube bending mechanism in a medical catheter and a medical device according to an embodiment of the present invention.

Fig. 14 shows a partial structural schematic view iii of an inner tube bending mechanism in a medical catheter and a medical device according to an embodiment of the invention.

Fig. 15 is a schematic structural diagram i of a first embodiment of an inner tube bending mechanism in a medical catheter and medical device according to an embodiment of the invention.

Fig. 16 is a schematic structural diagram ii of a first embodiment of an inner tube bending mechanism in a medical catheter and a medical device according to an embodiment of the invention.

Fig. 17 is a schematic structural diagram illustrating a second embodiment of an inner tube bending mechanism in a medical catheter and a medical device according to an embodiment of the invention.

FIG. 18 is a schematic structural diagram of a first embodiment of an inner tube locking mechanism in a medical catheter and medical device according to an embodiment of the invention.

FIG. 19 is a schematic structural diagram I of a second embodiment of an inner tube locking mechanism of a medical catheter and medical device according to an embodiment of the invention.

FIG. 20 is a second embodiment of a locking mechanism for an inner tube of a medical catheter and medical device according to an embodiment of the invention shown in FIG. II.

FIG. 21 is a schematic structural view III of a second embodiment of an inner tube locking mechanism in a medical catheter and medical device according to an embodiment of the invention.

FIG. 22 is a schematic structural view showing a third embodiment of an inner tube locking mechanism in a medical catheter and medical device according to an embodiment of the invention.

FIG. 23 is a schematic structural view showing a fourth embodiment of an inner tube locking mechanism in a medical catheter and medical device according to an embodiment of the invention

FIG. 24 is a schematic view of a medical device according to an embodiment of the present invention in which a catheter is inserted into the body through the mouth.

FIG. 25 is a schematic view of a tube in a medical device of an embodiment of the present invention looking for a pylorus in the stomach.

Fig. 26 shows a schematic view of a tube passing through the pylorus in the stomach of a medical device in accordance with an embodiment of the present invention.

FIG. 27 shows a schematic view of a tube entering the duodenum in a medical device according to an embodiment of the present invention.

Fig. 28 shows a schematic view of the support portion expanding the internal space of the intestine in the medical device according to the embodiment of the present invention.

FIG. 29 shows a schematic view of a bending segment of a tube in a medical device looking for a nipple and inserting a guidewire in accordance with an embodiment of the present invention.

FIG. 30 is a schematic view of the insertion of the tip of the inner tube into the nipple in a medical device according to an embodiment of the present invention.

FIG. 31 is a schematic view of a biopsy forceps extending through an inner tube instrument channel in a medical device according to an embodiment of the invention.

In the drawings, the reference numbers: in the drawings, the reference numbers: 1. a handle body;

101. an inner tube locking mechanism; 10100. locking the nut; 101001, an internal threaded hole; 10101. an inner tube locking washer; 101010, a first clamping hole; 10102. a locking seat; 101020, external threads; 10103. a first limit buckle; 10104. a clamping seat; 10105. rotating the disc; 101051, a handle mounting opening; 101052, a first sliding groove; 101053, a through opening of the rotating disc; 10106. an anti-rotation buckle groove; 10107. rotating the handle; 10108. fixing the disc; 101081, a second sliding groove; 101082, a fixed disc through hole; 10109. a clamping piece; 101091, a first protrusion; 101092, a second protrusion; 101093, a second clamping hole; 10110. a clamping end; 10111. a hinge; 10112. a fixed end; 10113. clamping the handle; 10114. a clamping opening; 10115. a sleeve; 10116. pipe sleeve; 10117. a first tooth; 10118. a second tooth.

102. An outer pipe control bending self-locking mechanism; 10201. a spring pin; 10202. a limiting rod; 102021, latch; 10203. a second limit buckle;

103. a left housing; 104. a right housing; 105. lifting a handle of the pincer; 106. a clamp lifting device turntable; 1061. a tooth socket; 107. an upper wheel disc knob; 108. a lower wheel knob; 109. locking the knob; 110. a tee fitting; 111. a balloon valve; 112. a clamp lifter pull rod is buckled; 113. a pulling rod of the forceps lifting device; 114. a slide block is buckled; 115. a clamp lifter sliding block; 116. a sliding plate of the clamp lifting device; 1161. a buckle sliding groove; 1162. a pull wire hole; 117. an inner tube passage; 118. a lower wheel disc flange; 119. a lower wheel disc; 1191. a fixed shaft mounting hole; 120. a fixed shaft; 121. a lower wheel disc spring leaf; 122. a lower wheel disc spring piece positioning plate; 123. a lower wheel disc spring piece sliding groove; 124. pulling a wire of the lower wheel disc; 125. a lower wheel disc stay wire buckle; 126. the upper wheel disc is provided with a flange; 127. an upper wheel disc; 128. an upper reel spring leaf; 129. an upper wheel disc spring piece positioning plate; 130. an upper wheel disc spring piece sliding groove; 131. pulling the wire by the upper wheel disc; 132. an upper wheel disc stay wire buckle; 133. a wheel disc baffle plate; 134. an inner tube connector; 135. an outer tube transition piece; 136. a cover plate of a pull line; 137. a water and gas injection pipe; 138. a suction port; 139. a locknut; 140. rotating the limiting block; 1401. a convex portion; 141. fixing a limiting block; 1411. kneading; 1421. a first locking washer; 1422. a second locking washer; 143. a passage hole; 144. a pressure lever; 145. locking the handle; 146. a shaft seat; 1461. a shaft; 147. a locking piece; 148. a spring;

2. a medical catheter; 201. a first body segment; 2011. a first path; 20111. a first hole; 2012. a first opening; 2013. a second opening; 2014. a first tube; 20141. a first chamber; 202. a first curved section; 203. a first head section; 2031. a second hole; 2032. a first mounting port; 2033. a third aperture; 2034. a second mounting opening; 2035. a camera assembly; 2036. a first light source; 204. a second tube; 2041. a second chamber; 205. a second path; 2051. a third tube; 2052. a third chamber; 2053. a fourth tube; 2054. a fourth chamber; 2055. a fourth aperture; 2056. a fifth pipe; 20561. a fifth chamber; 206. a third path; 2061. a sixth tube; 2062. a sixth chamber; 2063. a fifth aperture; 207. a first outer layer; 208. a second outer layer;

3. an outer tube; 301. an outer tube pull wire; 302. a second body segment; 3021. a passage; 3022. a lumen; 3023. a second center; 303. a support portion; 3031. a first center; 3032. a reservoir chamber; 304. a second curved section; 305. a second head segment; 3051. a second pull wire hole; 3052. a second light source; 3053. an inner pipe mounting hole; 3054. an opening; 306. and a third pull wire hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the medical catheter and medical device according to the present invention will be described in detail with reference to the accompanying drawings and embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.

In order to describe the structure of the medical catheter and the medical device more clearly, the present invention defines the terms "distal end" and "proximal end", which are terms used exclusively in the field of medical devices, and specifically, the term "proximal end" refers to the end close to the operator during the operation, and the term "distal end" refers to the end far away from the operator and entering the human body during the operation, and takes fig. 1 as an example, the left side of fig. 1 is the proximal end, and the right side of fig. 1 is the distal end.

The specific structure of the medical catheter 2 is described below:

referring to fig. 1 to 4, the medical catheter 2 includes a first main body section 201, a first bending section 202 and a first head section 203, wherein a distal end of the first main body section 201 is connected to a proximal end of the first bending section 202, and a distal end of the first bending section 202 is connected to a proximal end of the first head section 203.

Specifically, the first main body segment 201 is a flexible main body tube, the first bending segment 202 is a multi-cavity tube, the softness of the multi-cavity tube is softer than that of the flexible main body tube, and the cross section of the multi-cavity tube is the same as that of the flexible main body tube. In other embodiments of the present invention, the first curved section 202 may also be formed as a plurality of curved segments interconnected by a plurality of curved segments, the multi-lumen tubing or the configuration of the curved segments being known in the art.

The first main body section 201 has:

a first passageway 2011 for configuring a medical instrument; for accessing and moving along the first passageway 2011 a medical instrument, which in the present embodiment employs biopsy forceps.

At least one second passage 205, the second passage 205 is used for configuring a medium and leading into the circuit, and the medium is a liquid medium or a gas medium.

At least one third passageway 206, said third passageway 206 being for configuring a pull wire.

The specific structure of the first main body segment 201 of the medical catheter 2 in the first embodiment is described below:

referring to fig. 2 to 4, when the outer diameter of the medical catheter 2 (i.e., the first main body section 201, the first bending section 202 and the first head section 203) is not changed, the inner diameter of the first passageway 2011 is enlarged to 1.2mm to 2.8mm, specifically, the first passageway 2011 is a first hole 20111 axially penetrating through the first main body section 201, the first hole 20111 is a circular hole, preferably, the diameter of the first hole 20111 is 1.8mm, and in other embodiments of the present invention, the first hole 20111 may have any shape except for a circular hole.

Further, referring to fig. 2, in another alternative embodiment of the present invention, the first passageway 2011 is a first tube 2014 passing through the first body segment 201, wherein the first tube 2014 is embedded in the first hole 20111, a first cavity 20141 is formed inside the first tube 2014, in this embodiment, the first hole 20111 is used for installing the first tube 2014, the inner diameter of the first cavity 20141 is used for accessing and moving an instrument, and when the first tube 2014 is used, the inner diameter of the first cavity 20141 is enlarged to be not greater than 1.8mm when the outer diameter of the medical catheter 2 is unchanged.

The specific structure of the second passage 205 is described below as follows:

referring to fig. 3 and 4, the second passage 205 provides the first body segment 201 with an open structure, the open structure has an opening formed along the outer side of the first body segment 201, and the opening is recessed toward the center of the first body segment 201 along the radial direction. Specifically, in the embodiment of the present invention, there are two openings, which are the first opening 2012 and the second opening 2013 respectively.

At least one outer layer structure is wrapped outside the first main body section 201, and in the embodiment of the present invention, the outer layer structure is a first outer layer 207 and a second outer layer 208, where the first outer layer 207 is specifically a woven layer, and the second outer layer 208 is specifically a skin layer. The first outer layer 207 covers the outside of the first main body section 201, and the second outer layer 208 covers the first outer layer 207. When the outside of the first body segment 201 is covered by the first outer layer 207, the inside of a portion of the first outer layer 207 closes the first opening 2012 and the second opening 2013 to form an enclosed area.

With continued reference to fig. 3, in another alternative embodiment of the present invention, the second passage 205 may also be a third tube 2051 disposed at the first opening 2012 and a fourth tube 2053 disposed at the second opening 2013, the fourth tube 2053 having a fourth cavity 2054 for medium circulation, the third tube 2051 having a third cavity 2052 for circuit arrangement.

The third tube 2051 has one side fitted to the recessed portion of the opening and adapted in shape. Specifically, the third tube 2051 and the fourth tube 2053 are preferably designed to have an elliptical shape, so that the third cavity 2052 inside the third tube 2051 and the fourth cavity 2054 inside the fourth tube 2053 also form an elliptical cavity, thereby increasing the gas volume and the liquid flow rate when the second passage 205 is used for introducing gas or liquid. In other embodiments of the present invention, the third tube 2051 and the fourth tube 2053 may have any shape other than an oval shape as long as the shapes are sufficient for the medium to flow through and for the circuit to be mounted.

The first passage 2011 and the second passage 205 are independently arranged, so that the second passage 205 for introducing a circuit, liquid or gas does not occupy a space of the first main body section 201 where the first passage 2011 is formed, and thus the first passage 2011, i.e., the inner diameter of the hole of the first hole 20111 or the inner diameter of the tube of the first tube 2014, can be maximally arranged, and under the condition that the outer diameter of the first main body section 201 is not changed, the inner diameter of the hole of the first hole 20111 or the inner diameter of the tube of the first tube 2014 can be enlarged to 1.8mm (the passage is only 1.2mm in the original traditional structure) under the condition that the outer diameter of the medical catheter 2 is not changed, and the area is increased by nearly one time, so that the conventional biopsy forceps with the outer diameter of 1.5mm can be flexibly used, the sampling amount is greatly increased, and the sampling frequency is reduced. And the application range of the apparatus, such as a bracket, a stone-taking basket and the like, is expanded.

Further, referring to fig. 4, the third passage 206 is at least one fifth hole 2063 formed in the first main body segment 201, the inner diameter of the fifth hole 2063 is smaller than the inner diameter of the first hole 20111, the fifth hole 2063 is used for introducing a pull wire capable of controlling the curvature of the first bending segment 202, in the embodiment of the present invention, the fifth holes 2063 are four, so as to correspond to the first bending segment 202 of the medical catheter 2, and can be controlled by the handle and controlled along the upper, lower, left and right directions, and specifically, the pull wires in the fifth hole 2063 are configured as the upper wheel pull wire 131 and the lower wheel pull wire 124.

In other embodiments of the present invention, the third passageway 206 may also be formed by a sixth tube 2061, and the interior of the sixth lumen 2062 of the sixth tube 2061 is used for passing a pull wire capable of controlling the curvature of the first curved segment 202.

Further, referring to fig. 2, a first mounting hole 2032 and a second mounting hole 2034 are formed in the first head section 203, the first mounting hole 2032 is used for mounting the camera shooting component 2035, and the second mounting hole 2034 is used for mounting the first light source 2036, specifically, both the camera shooting component 2035 and the first light source 2036 adopt the prior art, which only needs to realize the visualization effect and the illumination effect of the first head section 203, and the present invention does not describe the structures of the camera shooting component 2035 and the first light source 2036 any more.

The first head section 203 is provided with a second bore 2031, and the second bore 2031 penetrates the first head section 203 and communicates with the second passage 205, specifically with a third cavity 2052 in the third tube 2051 in the embodiment of the present invention. A third bore 2033 extends through first head section 203 and is adapted to communicate with first passageway 2011, and in this embodiment of the invention specifically with first cavity 20141 in first tube 2014.

Referring to fig. 5, the specific structure of the first main body section 201 of the medical catheter 2 in the second embodiment is described as follows:

unlike the medical catheter 2 of the first embodiment, the shape of the first main body segment 201 is not changed, but the relative position of the first passage 2011 and the second passage 205 is changed, wherein the first passage 2011 is arranged inside the second passage 205, and the first passage 2011 and the second passage 205 are arranged coaxially or non-coaxially. Four fifth holes 2063 are also provided in the first body segment 201 for receiving an inner catheter pull wire for controlling the degree of bending of the medical catheter 2.

Specifically, referring to fig. 5, a fourth hole 2055 is formed in the first body segment 201, the first passage 2011 is specifically the second tube 204 disposed in the fourth hole 2055, the second tube 204 has a second cavity 2041 for accessing the medical apparatus, the second passage 205 is formed by the fifth tube 2056 disposed in the fourth hole 2055 and the hole space in the fourth hole 2055 except for the second tube 204 and the fifth tube 2056, wherein the fifth cavity 20561 of the fifth tube 2056 is used as the second passage 205 for mounting a circuit/wire, the hole space except for the second tube 204 and the fifth tube 2056 is used as the other second passage 205 for conveying a liquid or gas medium, the liquid or gas medium is conveyed by using the second passage 205, so that the space utilization rate is greatly improved, and the hole diameter of the fourth hole 2055 can be enlarged to 1.8mm without enlarging the overall outer diameter of the medical catheter 2, to obtain the technical effect in accordance with the first embodiment described above.

The specific structure of the outer tube is described below:

referring to fig. 6 to 8, the outer tube 3 includes a second main body section 302, a second bending section 304 and a second head section 305, wherein a proximal end of the second head section 305 is connected to a distal end of the second bending section 304, a proximal section 304 of the second bending section is connected to a distal end of the second main body section 302, a proximal end of the second main body section 302 is connected to the handle, and the outer tube further includes

At least one supporting part 303, wherein the supporting part 303 is arranged at the far end of the second main body section 302, and a storage cavity 3032 is arranged inside the supporting part 303;

a passage 3021, the passage 3021 extending through the second body section 302, a distal end of the passage 3021 communicating with the reservoir 3032, and a proximal end of the passage 3021 connected to the handle;

the support 303 is filled with a medium into the reservoir chamber 3032 through the passage 3021, and the support 303 is expanded or withdrawn from the reservoir chamber 3032 through the passage 3021 to contract the support 303, specifically, the support 303 is a balloon in the embodiment of the present invention.

Referring to fig. 10, the tee 110 is installed on the right housing 104 of the handle body 1, and the tee 110 is used for communicating a water path or an air path so as to introduce liquid or gas into the supporting portion 303.

Specifically, with continued reference to fig. 6-8, the first center 3031 of the supporting portion 303 is not concentric with the second center 3023 of the second main body segment 302. The support 303 is made non-concentric with one or more connection ends to the passage 3021 in the second body section 302, which connection ends are sealingly connected to the mouth of the passage 3021, in this embodiment only one connection end, which may be a connection port to communicate with the passage 3021. The decentration makes supporting part 303 and second main part 302 eccentric arrangement, eccentric arrangement makes supporting part 303 only props up from a direction inflation during inflation, supporting part 303 inflation drives whole section outer tube and removes and paste the intestinal wall tightly, utilizes supporting part 303 to strut the intestinal space and makes medical catheter 2 increase to the distance of nipple, provides space and stability for medical catheter 2's operation.

Further, with continuing reference to fig. 7 and 8, a third wire hole 306 and a lumen 3022 are formed in the second main body segment 302, the lumen 3022 is used for the inner tube 2 to pass through, a second wire hole 3051 is further formed in the second head segment 305, and a wire hole is also formed in the second bending segment 304 and corresponds to the third wire hole 306 and the second wire hole 3051, so as to allow the outer tube wire 301 to pass through. Referring to fig. 8, an opening 3054 and an inner tube mounting hole 3053 are formed in the second head section 305, the opening 3054 is formed along the axial direction of the second head section 305, the inner tube mounting hole 3053 and the opening 3054 are communicated with each other, and an angle at which the inner tube 2 can be bent in one direction is made larger by the opening 3054, which is convenient for a user to operate.

Further, with continued reference to fig. 7 and 8, a second light source 3052 is disposed on the second head section 305 of the outer tube 3, wherein the second light source 3052 is preferably an LED or an optical fiber, and the light source can illuminate a large space of the stomach when the medical catheter 2 and the outer tube 3 enter the stomach together. The second bending section 304 and the second main body section 302 are also provided with wire holes through which the power supply wires are passed for connecting the LEDs or optical fibers to supply power thereto through the wires. The specific arrangement form of the wire holes belongs to the known technology of the technicians in the field, and the detailed description of the invention is omitted.

The specific structure of the medical device is described below:

as shown in fig. 9, the medical device comprises the medical catheter 2, an outer tube 3 matched with the medical catheter 2 and a handle, wherein the proximal end of the outer tube 3 is connected with the handle, the proximal end of the medical catheter 2 is also connected with the handle, and the distal end of the medical catheter 2 enters the handle from a passage of the handle, penetrates through the proximal end of the outer tube 3 and extends out of the distal end of the outer tube 3.

The specific structure of the handle is described below:

referring to fig. 10, the handle according to the embodiment of the present invention includes:

the medical catheter comprises a handle body 1, wherein the handle body 1 is provided with a passage hole 143, the distal end of an outer tube 3 is connected with the handle body 1 through an outer tube transition connector 135, and a medical catheter 2 enters the interior of the handle body 1 through the passage hole 143 and enters the outer tube 3 from the distal end of the outer tube 3 so as to be matched with the outer tube 3.

Specifically, referring to fig. 10, the handle body 1 is formed by fixedly connecting a left housing 103 and a right housing 104.

The specific structure of the outer pipe bending control mechanism is described as follows:

referring to fig. 10 and 11, the handle further includes an outer tube bending control mechanism, the outer tube bending control mechanism is disposed inside the handle main body 1, and the outer tube bending control mechanism is configured to control bending of the outer tube 3, specifically, bending of the proximal end of the outer tube 3.

With continued reference to fig. 10 and 11, the outer tube bending control mechanism includes:

a first rotating part;

a first movable portion connected to a first rotating portion, the rotating portion being provided with a revolute pair and moving between a first position and a second position by the movable portion;

the distal end of the outer tube pull wire 301 is connected with the movable part, and the proximal end of the outer tube pull wire 301 extends into the outer tube 3 and is connected with the proximal end of the outer tube 3.

The following describes a specific structure of the first rotating part in the outer pipe bending control mechanism:

referring to fig. 15, in particular, the first rotating portion of the handle according to the embodiment of the present invention specifically adopts a forceps-lifting handle 105 and a forceps-lifting turntable 106, wherein the forceps-lifting handle 105 is clamped with and kept coaxial with the forceps-lifting turntable 106.

The specific structure of the first movable portion in the outer tube bending control mechanism is described below:

with continued reference to fig. 10, 11 and 15, the first movable portion includes a caliper lifting lever 113, a caliper lifting slider 115 and a caliper lifting slider 116, one end of the caliper lifting lever 113 is connected to the caliper lifting turntable 106 through a caliper lifting lever buckle 112, the other end of the caliper lifting lever 113 is connected to the caliper lifting slider 115 through a slider buckle 114, the caliper lifting slider 115 is installed in a buckle sliding groove 1161 of the caliper lifting slider 116, and the caliper lifting slider 116 is fixedly connected to the right housing 104 through a plurality of fasteners.

Further, referring to fig. 11, a wire hole 1162 is formed on one side of the buckle sliding groove 1161, and the wire hole 1162 is located at the lower portion of the forceps holder sliding plate 116, so that the outer tube wire 301 passes through the wire hole 1162 and extends into the outer tube 3 to be connected with the proximal end of the outer tube 3.

The structure of the inner pipe bending control mechanism is described as follows:

the inner pipe bending control mechanism is also arranged inside the handle main body 1 and is used for controlling the bending degree of the medical catheter 2. However, as will be appreciated by those skilled in the art, the inner tube bending control mechanism may also control bending in only one direction in addition to multiple directions, depending on the different circumstances of use.

The inner tube bending control mechanism comprises at least one set of control component, the set of control component is used for controlling two directions of the near end of the medical catheter 2, and in order to achieve bending of the near end of the medical catheter 2 in four directions, namely up, down, left and right, the inner tube bending control mechanism in the handle provided by the embodiment of the invention adopts two sets of control components. In order to prevent the two sets of control components from interfering with each other during rotation, the inner pipe bending control mechanism further comprises a wheel disc baffle 133, the wheel disc baffle 133 is fixed in the left shell 103, and the control components are respectively arranged on two sides of the wheel disc baffle 133, specifically on the upper side and the lower side of the wheel disc baffle 133.

The control part includes:

and the second rotating part is rotatably arranged in the handle main body 1.

The first elastic piece is connected with the second rotating part, and the rotating part is endowed with a rotating pair and realizes the movement between the third position and the fourth position through the first elastic piece;

and the near end of the inner tube pull wire is connected with the elastic part, and the far end of the inner tube pull wire extends into the medical catheter 2 and is connected with the near end of the medical catheter 2.

The specific structure of the first set of control components in the inner pipe bending control mechanism is described as follows:

referring to fig. 12, in particular, the second rotating portion adopts a lower wheel disc 119 in the handle according to the embodiment of the present invention, and the lower wheel disc 119 is rotatably disposed on the left housing 103. The first elastic piece is a lower wheel disc spring leaf 121, the center of the lower wheel disc spring leaf 121 is fixedly connected with the lower wheel disc 119 through a fastener, two ends of the lower wheel disc spring leaf 121 are respectively welded with the far end of a lower wheel disc pull wire 124, and the near end of the lower wheel disc pull wire 124 extends into the medical catheter 2 and extends to be connected with the near end of the medical catheter 2.

Referring to fig. 12, further, in order to ensure that the lower sheave stay 124 does not bend during the movement, at least one lower sheave stay buckle 125 is further disposed on the left casing 103, and a positioning hole for positioning the lower sheave stay 124 is disposed in the lower sheave stay buckle 125 so that the lower sheave stay 124 passes through the positioning hole.

With continued reference to fig. 12, further, the left housing 103 is further provided with an inner tube connector 134, the distal end of the medical catheter 2 is connected to the inner tube connector 134, and the medical catheter 2 extends from the inner tube connector 134 and enters the passage hole 143 to enter the interior of the handle body 1. The body of the medical catheter 2 between the passage hole 143 and the inner tube connector 134 forms an inner tube loop, and the extension and retraction of the first head section 203 of the medical catheter 2 can be controlled by adjusting the size of the inner tube loop.

With reference to fig. 12, further, a lower wheel disc rib 118 is fixedly connected to the left shell 103 near the lower wheel disc spring leaf 121, the lower wheel disc rib 118 clamps the lower wheel disc spring leaf 121 in a gap between the lower wheel disc rib 118 and the lower wheel disc 119, and the lower wheel disc spring leaf 121 is limited to the inner side of the lower wheel disc rib 118 by the lower wheel disc rib 118, so that the lower wheel disc spring leaf 121 is prevented from being bounced up by mistake.

With reference to fig. 2, the inner tube bending control mechanism further includes at least two lower wheel spring plate positioning plates 122, preferably, three lower wheel spring plate positioning plates 122 are provided in the handle according to the embodiment of the present invention, a space is provided between adjacent lower wheel spring plate positioning plates 122 and fixed to the lower surface of the wheel retainer 133, and a lower wheel spring plate sliding groove 123 is formed between adjacent lower wheel spring plate positioning plates 122. The lower wheel spring leaf sliding groove 123 can prevent the lower wheel spring leaf 121 from generating friction with the left shell 103 and other parts on the left shell 103.

The specific structure of the second set of control members in the inner tube bending control mechanism is described as follows:

the second set of control members is identical to the first set of control members in structure and arrangement, except that the structures are mounted as follows:

referring to fig. 13 and 15, the second rotating portion of the second set of control members is an upper wheel disc 127, the upper wheel disc 127 is sleeved on the axial end of the lower wheel disc 119, and the axial end of the lower wheel disc 119 extends from the axial end of the upper wheel disc 127. The upper wheel disc rib 126, the three upper wheel disc spring piece positioning plates 129 and the plurality of upper wheel disc pull wire buckles 132 are all fixed on the upper surface of the wheel disc baffle 133, the upper wheel disc spring piece 128 is clamped between the upper wheel disc rib 126 and the upper wheel disc 127, two ends of the upper wheel disc spring piece 128 extend into the upper wheel disc spring piece sliding groove 130 between the adjacent upper wheel disc spring piece positioning plates 129 respectively, two ends of the upper wheel disc spring piece 128 are connected with the far end of one upper wheel disc pull wire 131 respectively, and the near end of each upper wheel disc pull wire 131 penetrates through the upper wheel disc pull wire buckle 132 and extends into the medical catheter 2 and extends to be connected with the near end of the medical catheter 2.

With continued reference to fig. 13, an inner tube channel 117 is further provided inside the left housing 103, an upper end of the inner tube channel 117 communicates with the channel hole 143, and a lower end of the inner tube channel 117 extends into the outer tube transition piece 135.

Referring to fig. 14, the inner pipe bending control mechanism further includes a wire pulling cover plate 136, the wire pulling cover plate 136 is fixedly connected to the upper surface of the wheel disc baffle 133 through a fastener, and the wire pulling cover plate 136 covers the upper wheel disc spring leaf positioning plate 129 on the upper surface of the wheel disc baffle 133, so as to prevent unnecessary friction caused by contact between the upper wheel disc pull wire 131 and other parts, so as to prolong the service life of the upper wheel disc pull wire 131 and prevent abrasion thereof. In addition, the cable cover 136 also has a limiting function, which can limit the upper wheel spring plate 128 to the inner space of the cable cover 136.

The outer tube bend self-locking mechanism 102 is described below.

In order to realize that the outer pipe 3 can be kept at the bending degree after being controlled by the outer pipe bending control mechanism, the handle is further provided with an outer pipe bending control self-locking mechanism 102, and the outer pipe bending control self-locking mechanism 102 comprises:

a pressing part which is arranged in the handle body 1;

the third rotating part is rotatably arranged in the handle main body 1, and when the pressing part is pressed, the third rotating part can rotate relative to the handle main body 1 and is clamped with the first rotating part.

Specifically, referring to fig. 11, the pressing portion is a spring pin 10201, the spring pin 10201 is mounted on an upper portion of the right housing 104, and a pin portion of the spring pin 10201 extends into the right housing 104. The third rotating part is specifically a limiting rod 10202, the second limiting buckle 10203 is fixed on the right housing 104, and the limiting rod 10202 is in clearance fit with the second limiting buckle 10203, so that the limiting rod 10202 can rotate relative to the second limiting buckle 10203.

The outer tube control bending self-locking mechanism 102 is used as follows, the spring pin 10201 moves downwards when being pressed, so that the pin head of the spring pin 10201 presses the limiting rod 10202, the limiting rod 10202 rotates along the second limiting buckle 10203 and contacts the caliper lifting turntable 106, and the rotation of the caliper lifting turntable 106 is limited, so that the self-locking of the outer tube 3 at any bending degree is realized.

Referring to fig. 11, in order to realize the self-locking of the proximal bending portion of the outer tube 3 at a specific angle, a plurality of latches 102021 are further disposed on the side of the limiting rod 10202 contacting the forceps holder rotating disk 106, and a plurality of tooth sockets 1061 engaged with the latches 102021 are also disposed on the outer side of the forceps holder rotating disk 106 contacting the limiting rod 10202, the distance between each latch 102021 or each tooth socket 1061 may be large or small, and if the distance is large, the proximal bending angle of the outer tube 3 is switched between large angles, such as 30 °, 60 °, 90 °, and the like. Conversely, if a small distance is provided, the bending angle of the proximal end of the outer tube 3 can be switched between small angles. E.g., 5 °, 10 °, 15 °, etc.

The tooth socket structures on the forceps raising device rotating disc 106 and the limiting rod 10202 can also be changed according to different use conditions, for example, flexible protrusions can be used for contact, and the invention is not limited to the tooth socket 1061 arranged on the forceps raising device rotating disc 106 or the latch 102021 arranged on the limiting rod 10202, and any structure can be used as long as the structure can realize the clamping connection between the forceps raising device rotating disc 106 and the limiting rod 10202 when in contact, and the invention is not limited thereto.

The specific structure of the first embodiment of the inner tube bending control self-locking mechanism is described below, and the inner tube bending control self-locking mechanism is arranged inside the handle body 1 and can lock the medical catheter 2 in any one of the upper, lower, left and right directions.

The structure of the first embodiment of the inner pipe control bending self-locking mechanism comprises:

a fourth rotating part rotatably disposed in the handle body 1. Specifically, referring to fig. 17, the fourth rotating portion includes a pressing rod 144 and a locking handle 145, wherein the locking handle 145 is in threaded connection with an upper end of the pressing rod 144, a lower end of the pressing rod 144 is in threaded connection with a threaded hole formed in an upper portion of the left housing 103, a lower end of the pressing rod 144 is respectively connected with a proximal end of one locking plate 147, two adjacent locking plates 147 are adjacent to each other and connected with the shaft seat 146 through the same shaft 1461, one locking plate 147 is close to an outer side of the lower wheel disc 119, and the other locking plate 147 is close to an outer side of the upper wheel disc 127. A spring 148 is also connected between the pair of locking tabs 147, and distal ends of the pair of locking tabs 147 on the spring 148 can be spread apart to release the upper disc 127 and the lower disc 119.

Embodiment one the working process of the inner pipe bending control mechanism is as follows:

the locking handle 145 is rotated, the locking handle 145 rotates to drive the pressure lever 144 to rotate and move downwards in a small amplitude through the threads, and in the action process, the adjacent locking sheets 147 rotate by taking the shaft 1461 as a rotation point, so that the far ends of the adjacent locking sheets 147 are oppositely closed and respectively hug the upper wheel disc 127 and the lower wheel disc 119 tightly, and the self-locking of the medical catheter 2 in any direction is realized. And in the non-self-locking state, the distal ends of the adjacent locking sheets 147 can be relatively opened and contact self-locking of the upper wheel disc 127 and the lower wheel disc 119 through the spring 148.

Next, a specific structure of the second embodiment of the inner pipe bending control self-locking mechanism is described, and the inner pipe bending control self-locking mechanism is disposed outside the handle body 1.

Referring to fig. 15 and 16, in the second embodiment, the inner tube bending self-locking mechanism includes a fixing shaft 120, one end of the fixing shaft 120 is connected to a fixing shaft mounting hole 1191 of the lower wheel disc 119, the lower wheel disc 119 is connected to the lower wheel disc knob 108, and the upper wheel disc 127 is connected to the upper wheel disc knob 107.

Referring to fig. 15 and 16, the device further includes a fifth rotating portion, and the fifth rotating portion is rotatably disposed on the fixed shaft 120. Specifically, the fifth rotating portion is composed of a rotating stopper 140 and a fixed stopper 141, the locking knob 109 is connected to the outside of the rotating stopper 140, a protrusion 1401 is disposed on the lower surface of the rotating stopper 140, a surface 1411 of the fixed stopper 141 opposite to the rotating stopper 140 is formed by increasing the height, and the surface 1411 enables the rotation of the rotating stopper 140 to be converted into the axial movement of the fixed stopper 141. The fixed limiting block 141 and the rotating limiting block 140 are in clearance fit with one end of the fixed shaft 120 respectively, and the end of the fixed shaft 120 is screwed through the locknut 139, so that the rotating limiting block 140 is prevented from being separated from the fixed shaft 120.

The two control components are adopted in the handle according to the embodiment of the present invention, the two control components are respectively a first locking washer 1421 and a second locking washer 1422, wherein the first locking washer 1421 is disposed in the opening on the back of the fixed limiting block 141, the second locking washer 1422 is disposed between the upper wheel disc knob 107 and the lower wheel disc knob 108, the second locking washer 1422 is in clearance fit with the shaft end of the lower wheel disc 119, and the outer diameter of the second locking washer 1422 is greater than the central aperture of the lower wheel disc knob.

Second embodiment the operation of the inner tube bending locking mechanism is as follows:

referring to fig. 15 and 16, the rotation locking knob 109 drives the rotation limiting block 140 to rotate, the rotation limiting block 140 rotates along the surface 1411, and then the fixed limiting block 141 is subjected to an axial extrusion force, so as to achieve axial movement, because the first locking washer 1421 is disposed on the back surface of the fixed limiting block 141, the first locking washer 1421 is extruded and applies a pressure to the lower wheel disc 108 along the axial direction, the lower wheel disc knob 108 moves under the extrusion force, the first locking washer 1421 is pressed to deform during the movement, and the first locking washer 1421 deforms to increase the damping and hugs the shaft end of the lower wheel disc 119 tightly, so that the shaft end cannot rotate. Meanwhile, the lower wheel disc knob 108 moves axially at the shaft end of the lower wheel disc 119 after being pressed and contacts the upper wheel disc knob 107, so that the inner diameter of the second locking gasket 1422 at the upper wheel disc knob 107 contracts in the radial direction and clasps the shaft end of the upper wheel disc 127, and the upper wheel disc 127 is locked, and the bending degree of the upper wheel disc 127 and the lower wheel disc 119 is locked.

The inner tube locking mechanism 101 is described below.

In order to limit the medical catheter 2 from further moving relative to the outer tube 3, an inner tube locking mechanism 101 is further arranged on the handle body 1, the inner tube locking mechanism 101 is arranged outside the handle body 1 and close to the passage hole 143, and the structure of the inner tube locking mechanism 101 in the first embodiment is as follows:

the inner tube locking mechanism 101 includes a first fixed portion and a first rotating portion rotatably connected to the first fixed portion, the first rotating portion being provided with a revolute pair to rotate relative to the first fixed portion;

the clamping portion is arranged between the first fixing portion and the first rotating portion, the first rotating portion rotates to apply pressure to the clamping portion, and the clamping portion is applied pressure and extrudes the inner pipe along the radial direction.

Specifically, please refer to fig. 18, the first fixing portion is a locking seat 10102, the first rotating portion is a locking nut 10100, one end of the locking seat 10102 has an external thread 101020, the locking nut 10100 has an internal thread hole 101001 capable of being connected with the external thread 101020, the internal thread hole 101001 penetrates through the locking nut 10100, a through hole for the inner tube to penetrate through is also formed in the locking seat 10102, an inner tube locking gasket 10101 is arranged between the locking seat 10102 and the locking nut 10100, the outer diameter of the inner tube locking gasket 10101 can be matched with the aperture of the internal thread hole 101001, the material of the inner tube locking gasket 10101 is not limited to silica gel, rubber and the like, and a first clamping hole 101010 allowing the medical catheter 2 to pass through is also formed in the inner tube locking gasket 10101.

Embodiment one the specific working process of the inner tube locking mechanism 101 is as follows:

the locking nut 10100 is on the external screw thread 101020 of forward screw in locking seat 10102, and the inner tube locking gasket 10101 is extruded gradually at the locking nut 10100 in the screw in process, makes the aperture of the first clamp hole 101010 of inner tube locking gasket 10101 reduce gradually in order to hold tightly the external diameter of medical catheter 2 to realize the locking of medical catheter 2. Conversely, when the lock nut 10100 is rotated reversely, the inner tube lock washer 10101 is no longer squeezed and the reset of the through hole aperture in the inner tube lock washer 10101 is realized, so that the medical catheter 2 is loosened, and the medical catheter 2 can move relative to the outer tube 3.

The specific structure of the inner tube locking mechanism 101 according to the second embodiment is as follows:

referring to fig. 19 to 21, the clamp includes a clamping seat 10104 and a clamping portion, a rotating disc 10105 and a fixed disc 10108 are disposed in the clamping seat 10104, the clamping portion is an adjustable clamping assembly formed by a plurality of clamping pieces 10109, a second clamping hole 101093 is formed between each clamping piece 10109, and the adjustable clamping assembly is driven to open and close by the rotation of the rotating disc 10105, so that the diameter of the second clamping hole 101093 is changed along a radial direction.

Wherein, have first connecting portion on the rolling disc 10105, this first connecting portion are for seting up first sliding tray 101052 on rolling disc 10105, one side of every piece clamping sheet 10109 set up with the second connecting portion that first connecting portion correspond is connected, the second connecting portion specifically be along the convex first arch 101091 in clamping sheet 10109 one side.

When the rotating disc 10105 rotates, the first sliding groove 101052 drives the first protrusion 101091 on the clamping piece 10109 to move along the moving path of the first sliding groove 101052.

With continuing reference to fig. 19 and fig. 21, the fixed plate 10108 has a third connecting portion, the third connecting portion is a second sliding groove 101081 opened on the fixed plate 10108, the other side of the clamping piece 10109 is provided with a second protrusion 101092 connected with the second sliding groove 101081, and the second protrusion 101092 on the clamping piece 10109 moves along the second sliding groove 101081 when rotating.

The clamping pieces 10109 forming the adjustable clamping assembly are uniformly distributed along the circumferential direction, and parts of the adjacent clamping pieces 10109 are tangent to form the same included angle, so that no gap exists between each clamping piece 10109 in the radial opening and closing movement of the adjustable clamping assembly.

A handle mounting opening 101051 is formed in the rotating disc 10105 for inserting the rotating handle 10107, a rotating disc through opening 101053 is formed in the axis of the fixed disc 10108, a fixed disc through opening 101082 is formed in the axis of the rotating disc, and the rotating disc through opening 101053 and the fixed disc through opening 101082 are used for passing through the medical catheter 2. The clamping seat 10104 is sleeved on the outer side of the rotating disc 10105, a first limiting buckle 10103 extending along the radial direction is arranged on the clamping seat 10104, and at least one anti-rotation buckle groove 10106 is formed in the outer side of the rotating disc 10105 and used for being clamped with the first limiting buckle 10103 to limit the rotation of the rotating disc 10105.

Embodiment three the specific structure of the inner tube locking mechanism 101 is as follows:

the inner tube locking mechanism 101 includes a second fixed portion and a second rotating portion hinged to the second fixed portion, and the second fixed portion is connected to the other end of the second rotating portion, which is not connected to the second rotating portion, through a fastening device.

Referring to fig. 22, specifically, the second fixing portion is a fixing end 10112, the second rotating portion is a clamping end 10110, semicircular clamping openings 10114 for matching the outer diameter of the medical catheter 2 are respectively formed in the fixing end 10112 and the clamping end 10110, one end of the fixing end 10112 is hinged to one end of the clamping end 10110 through a hinge 10111, and the other end of the fixing end 10112 and the other end of the clamping end 10110 are respectively provided with a threaded hole. The fastening device is a clamping handle 10113 with screw threads, and the clamping end 10110 presses against the fixed end 10112 and clasps the medical catheter 2 by rotating the clamping handle 10113 to connect with the clamping end 10110 and the end of the fixed end 10112 with the screw threads.

The specific structure of the inner tube locking mechanism 101 according to the fourth embodiment is as follows:

referring to fig. 23, a first portion, which is connected to the handle body 1 and has a hole.

The second portion, the second portion cover in the removal end of inner tube and can with first portion passes through protruding structure butt or passes through tooth's socket structure joint.

Specifically, referring to fig. 14, the first portion is a tube sleeve 10116, the tube sleeve 10116 is disposed on the handle body 1, and a hole for inserting the medical catheter 2 is formed in the tube sleeve 10116.

The second part is specifically a sleeve 10115, and the sleeve 10115 covers the moving end of the medical catheter 2.

Specifically, the protruding structure refers to at least one protruding point arranged on the inner wall of the hole and at least another protruding point arranged on the outer side of the sleeve 10115, the protruding points are flexible structures, the sleeve 10115 is matched with the hole in the sleeve 10116, the protruding point on the inner wall of the hole is abutted to the another protruding point on the outer side of the sleeve 10115, and friction between the sleeve 10115 and the sleeve 10116 is increased to fix the medical catheter 2.

Specifically, the tooth space structure refers to at least one second tooth 10118 disposed on the outer side of the sleeve 10115 and at least one groove disposed on the inner wall of the bore of the sleeve 10116, or may also be at least one first tooth 10117 disposed on the inner wall of the bore of the sleeve 10116 and at least one groove disposed on the outer side of the sleeve 10115, and the tooth space structure may also increase the friction force between the sleeve 10115 and the sleeve 10116 to fix the medical catheter 2.

The specific use of the medical device is described below:

the first step is as follows: referring to fig. 24, the tip end of the medical catheter 2 is inserted through the inner tube locking mechanism 101 and enters the inner tube channel 117 through the channel hole 143, and the medical catheter 2 is slowly pushed until the tip end enters the outer tube 3 and extends 4-5 cm from the distal end of the outer tube 3 (in this state, the first bending section 202 of the medical catheter 2 extends completely).

Referring to the first embodiment of the inner tube locking mechanism 101, the relative position of the medical catheter 2 with respect to the outer tube 3 is fixed by rotating the locking nut 10100 on the locking seat 10102 to press the inner tube locking washer 10101, and further, to radially clamp the medical catheter 2 through the first clamping hole 101010. The imaging assembly 2035 and the first light source 2036 on the medical catheter 2 and the second light source 3052 on the outer tube 3 are turned on for illumination and imaging. The user holds the handle with the left hand, and the body part of the outer tube 3 with the right hand is about 20-30 cm away from the second head section 305 of the outer tube 3, so that the outer tube 3 is inserted from the mouth of the patient.

The second step is that: referring to fig. 25 and 26, in the process of pushing the outer tube 3 with the right hand, the upper wheel 127 and the lower wheel 119 are continuously rotated by the left hand to control the bending degree of the medical catheter 2, which comprises the following steps:

referring to fig. 12 to 14, taking one set of control components as an example, the upper wheel disc knob 107 is rotated, the upper wheel disc knob 107 drives the upper wheel disc 127 to rotate, so as to control the upper wheel disc spring piece 128 to move in the upper wheel disc spring piece sliding groove 130, the upper wheel disc spring piece 128 further drives the upper wheel disc pull wire 131 to move, as the upper wheel disc pull wire 131 penetrates through the first cavity 20141 of the first tube 2014 in the first main body section 201 of the medical catheter 2 and is connected with the first bending section 202, the upper wheel disc pull wire 131 can drive the first bending section 202 to move to control the first bending section 202 to bend when moving, and the image fed back by the image pickup assembly 2035 passes through the esophagus into the stomach, and then passes through the pylorus into the duodenum after the stomach is illuminated by the first light source 2036 and the second light source 2.

The third step: referring to fig. 10 and 27, gas or liquid is injected into the passage 3021 of the outer tube 3 through the tube from the balloon valve 111 at the tail of the stomach by using a syringe, the gas or liquid passes through the passage 3021 and enters the accumulation cavity 3032 of the support 303 to inflate the support 303, and the space inside the duodenum is inflated by the support 303. In other embodiments of the present invention, the water and gas injection pipe 137 may be connected to the passage 3021 through a pipe to supply gas or liquid into the reservoir 3032 of the support 303 through the passage 3021.

The fourth step: referring to fig. 28, the left hand operates the handle to perform the outer control bending, and the specific process of the outer control bending is as follows:

the specific working process of the outer pipe bending control mechanism is as follows:

referring to fig. 10 and 11, a user operates the forceps-lifting handle 105, the forceps-lifting handle 105 drives the forceps-lifting turntable 106 to rotate, the forceps-lifting turntable 106 is provided with a revolute pair, the revolute pair is converted into a moving pair in which the forceps-lifting slider 115 reciprocates in the buckle sliding groove 1161 of the forceps-lifting sliding plate 116 through the forceps-lifting pull rod 113, the forceps-lifting slider 115 drives the proximal end of the outer tube 3 to bend through the outer tube pull wire 301 during moving, so that the proximal end of the outer tube 3 provides a baffle effect during bending, the advancing direction of the medical catheter 2 matched with the outer tube 3 is changed, the endoscope is changed into a side view direction from an original direct view direction during viewing into duodenum, and the medical catheter 2 can be aligned with a nipple on the side wall of the duodenum descending part and continuously enters in the direction of the common bile duct. The medical catheter 2 is withdrawn by the control means into alignment with the second head section 305 of the outer tube 3. The relative positions of the medical catheter 2 and the outer tube 3 are fixed again by the inner tube locking mechanism 101.

When the second bending section 304 of the outer tube 3 is bent by 90 °, the medical catheter 2 is positioned in the outer tube 3, so that the medical catheter 2 is also bent by about 90 ° with the outer tube 3, please refer to fig. 29, the view direction of the first head section 203 of the medical catheter 2 is changed from the same direction as the outer tube 3 to be perpendicular to the outer tube 3, thereby forming a side-view observation effect. The user continues to slowly insert the outer tube 3 with his right hand until a nipple formation on the side wall of the twelve straight long descending portions is found.

Referring to fig. 30, the inner tube locking mechanism 101 is released, so that the inner tube 2 can go further and the bending angle of the first bending section 202 of the medical catheter 2 is controlled by the inner tube bending control mechanism, so that the nipple appears in the visual field of the first head section 203 of the medical catheter 2. The guide wire is inserted from the instrument channel of the handle, sequentially passes through the first lumen 2041 of the first main body segment 201 of the medical catheter 2, passes through the first curved segment 202, and extends out of the fourth bore 2033, and is viewed on the image transmitted back by the camera assembly 2035 to enter the bile duct or pancreatic duct.

If the nipple opening is small, a cutting knife or a nipple expansion balloon can be inserted along the guide wire to perform the nipple opening expansion work. The first head section 203 of the medical catheter 2 is advanced progressively deeper to look for stones or suspected tumor protrusions.

The fifth step: after the calculus is found, the guide wire is pulled out, and then the optical fiber or the electrode is inserted along the first path of the medical catheter 2, specifically, the optical fiber or the electrode sequentially passes through the first bending section 202 from the first cavity 20141 in the first tube 2014 of the medical catheter 2 and extends out of the fourth hole 2033 for laser lithotripsy or electrohydraulic lithotripsy.

With continued reference to fig. 31, upon finding a suspicious tumor protrusion, the guidewire may be withdrawn, a biopsy forceps inserted, and a biopsy performed sequentially from the first lumen 20141 in the first tube 2014 of the medical catheter 2 through the first curved section 202 and out the fourth hole 2033.

After the operation, the gas or liquid in the storage chamber 3032 in the support part 303 is pumped out through the suction port 138, the pipeline and the primary injection channel by the syringe, and then the medical catheter 2 and the outer tube 3 are pulled out of the human body together.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A medical catheter, characterized by: the medical instrument puncture outfit comprises a first main body section, a first bending section and a first head section, wherein the far end of the first main body section is connected with the near end of the first bending section, the far end of the first bending section is connected with the near end of the first head section, the first main body section is provided with at least one first passage, and the first passage is used for configuring a medical instrument to penetrate in and penetrate out.

2. The medical catheter of claim 1, wherein: the medical catheter further comprises at least one second passage and at least one third passage, wherein the second passage is used for flowing media or leading into a circuit, and the third passage is used for configuring a pull wire.

3. The medical catheter of claim 2, wherein: the first passage is provided inside the second passage.

4. The medical catheter of claim 2, wherein: the second passageway provides the first body segment with an opening that opens along an exterior side of the first body segment.

5. The medical catheter of claim 4, wherein: the opening is formed along an axial direction of the first main body section.

6. The medical catheter of claim 5, wherein: the opening is recessed radially toward a center of the first body segment.

7. The medical catheter of claim 6, wherein: the outer side of the first main body section is covered with at least one outer layer structure.

8. The medical catheter of claim 3, wherein: the first passage is disposed coaxially with the second passage.

9. The medical catheter of claim 3, wherein: the first passageway and the second passageway are disposed non-coaxially.

10. The medical catheter of claim 1, wherein: when the outer diameter of the first main body section is unchanged, the inner diameter of the first passage is enlarged to be not more than 1.2-2.8 mm.

11. A medical device, characterized by: the medical catheter comprises the medical catheter as claimed in any one of claims 1 to 10, and an outer tube and a handle which are matched with the medical catheter for use, wherein the proximal end of the outer tube is arranged in the handle, the distal end of the outer tube extends out of the handle, the proximal end of the medical catheter is movably connected with the handle, and the distal end of the medical catheter extends into the handle and penetrates through the outer tube.