CN116965758A

CN116965758A - Inter-sheath perfusion type endoscope

Info

Publication number: CN116965758A
Application number: CN202310990408.7A
Authority: CN
Inventors: 方立; 程跃
Original assignee: First Affiliated Hospital Of Ningbo University
Current assignee: First Affiliated Hospital Of Ningbo University
Priority date: 2023-08-07
Filing date: 2023-08-07
Publication date: 2023-10-31

Abstract

The invention provides an inter-sheath perfusion endoscope, which comprises a sheath body assembly and an inner core assembly, wherein the sheath body assembly comprises a sheath main body and a main channel, the sheath main body is suitable for providing supporting and expanding effects, the inner core assembly comprises a front section extending part and a rear section operating part, the front section extending part is suitable for being arranged in the main channel, the rear section operating part is suitable for being positioned outside a patient body so as to operate and control the front section extending part at the front end to bend, a perfusion channel is formed between the front section extending part and the sheath main body, the front end of the front section extending part is provided with a discharge channel, and a surgical instrument which is communicated with the discharge channel is maintained to be always positioned in an operation environment with a suction and discharge integrated body.

Description

Inter-sheath perfusion type endoscope

Technical Field

The invention relates to the field of medical instruments, in particular to an inter-sheath perfusion type endoscope.

Background

Compared with the traditional operation, the minimally invasive operation has the advantages of small wound, quick recovery, pain reduction of patients and the like. The endoscope minimally invasive medical instrument can effectively help doctors to 'see' focus as eyes of doctors. With the popularization of minimally invasive surgical techniques worldwide, endoscopes have also entered a rapid development period.

Endoscopes are widely used in clinic in different departments and for the treatment of different diseases. Mainly comprises a hose type endoscope (called soft endoscope for short) and a hard tube type endoscope (called hard endoscope for short), wherein the soft endoscope mainly comprises a gastroscope, a enteroscope, a laryngoscope, a fiber bronchoscope and the like; hard scopes include laparoscopes, thoracoscopes, ureteroscopes, cystoscopes, arthroscopes, hysteroscopes, and the like.

With the continuous upgrading of technology and the continuous perfection of medical systems, the global endoscope market demand will further expand and develop toward miniaturization and consumable materials in the future.

In the process of pushing a traditional endoscope in a patient, as tissues in the patient play a role of channel construction, a natural channel is used as a working channel of the endoscope, and the size of the volume of the endoscope is often limited by the tissue volume of the patient. The endoscope with the overlarge cross section is easy to damage the inside of a patient in the using process, so that the recovery time of the patient is prolonged.

The traditional endoscope has the functions of perfusion and suction and discharge, namely, in the operation process of surgery, the functions of stone breaking, stone discharge and the like are integrated into a whole, and the endoscope is limited by the existence of a natural channel of a human body, so that the whole size of the endoscope tends to be miniaturized, and the requirement on the manufacturing process is higher.

Disclosure of Invention

It is an advantage of the present invention to provide an intrathecal infusion endoscope that can achieve irrigation between the outer sheath and the inner core and suction of the inner core.

Another advantage of the present invention is to provide an intrathecal infusion endoscope that avoids the problem of delayed recovery time of a patient caused by the sequential access of a multi-functional instrument to the body passageway of the patient through its structural cooperation.

Another advantage of the present invention is to provide an intrathecal infusion endoscope that, by its own structural design, maximizes the overall radial size requirements while distinguishing between infusion and suction functions.

Another advantage of the present invention is to provide an intrathecal infusion endoscope that can establish a discharge channel with a large radial area to avoid the problem of debris, blood clots, pus, tissue, etc. being unable to be discharged outside the patient during a surgical procedure.

Another advantage of the present invention is to provide an intrathecal infusion endoscope that also achieves the infusion purposes through a narrower intrathecal infusion channel, reducing overall size requirements.

Another advantage of the present invention is to provide an intrathecal infusion endoscope that can prevent surgical instruments from being deviated due to suction during operation by setting up instrument channels and discharge channels with rear ends independent of each other.

Another advantage of the present invention is to provide an intrathecal infusion endoscope that can be applied to natural channel operation of the human body in various medical fields in cooperation with surgical instruments in different medical fields to achieve versatility in multiple fields.

Another advantage of the present invention is to provide an intrathecal infusion endoscope that combines both visualization and illumination functions to enable surgery in a visual operating environment.

According to one aspect of the present invention, there is provided an intrathecal infusion endoscope, a surgical instrument adapted for surgical manipulation along the intrathecal infusion endoscope and into a patient,

the intrathecal infusion endoscope includes:

a sheath assembly comprising a sheath body providing external support and expansion and having a main channel extending through front and rear end surfaces of the sheath body; and

the inner core assembly comprises a front section extending part, a middle section connecting part and a rear section operating part and is provided with a discharge channel, the front section extending part, the middle section connecting part and the rear section operating part are integrally connected, the front section extending part is suitable for extending from back to front to the main channel, the middle section connecting part limits the rear section operating part outside a patient, the discharge channel penetrates from the front end surface of the front section extending part to the rear end surface of the rear section operating part, a perfusion channel is formed between the sheath main body and the front section extending part, the surgical instrument is suitable for entering the patient through the discharge channel and is matched with the perfusion channel and the discharge channel to realize the suction and discharge integration in the surgical process.

According to one embodiment of the invention, the sheath assembly has a perfusion port provided in a rear side of the sheath body, the perfusion port being in communication with the main channel, the perfusion port being adapted to be in communication with the perfusion channel formed between the sheath body and the anterior-segment extension, and an operator being adapted to provide perfusion of perfusion fluid into the patient through the perfusion port.

According to one embodiment of the present invention, the sheath assembly includes a rear locking member disposed on a rear end surface of the sheath body, the rear locking member restricting the intermediate section connecting section and the rear section operating section from entering the patient body when the inter-sheath irrigation type endoscopic surgical state is performed.

According to one embodiment of the invention, the rear end locking member blocks the perfusate in the perfusion channel from flowing out from the front section to the rear end at the mid-section connection.

According to one embodiment of the invention, wherein the anterior-segment extension comprises a mirror body adapted to be disposed within the main channel, the radial area of the sheath body being greater than the radial area of the mirror body.

According to one embodiment of the invention, the rear operating section includes a grip body providing a grip and installation space, and at least one control unit provided to the grip body, and an operator controls bending of the mirror body by operating the control unit.

According to one embodiment of the invention, wherein the mirror body and the sheath body are cooperatively bendable to accommodate a natural passageway of a patient.

According to an embodiment of the present invention, the rear-stage operation portion has a visual access port and an illumination access port, the visual access port and the illumination access port being provided to the grip body, respectively, the visual access port and the illumination access port extending to the front end face of the mirror body, respectively, to provide illumination and visual functions.

According to one embodiment of the invention, the discharge channel, the visual access opening and the illumination access opening are spaced apart from each other on the front face of the mirror body, and the surgical instrument is maintained in a visually illuminated environment as it extends from the discharge channel to the front of the front face of the mirror body.

According to one embodiment of the invention, the perfusion channels are distributed on the peripheral side of the discharge channel, from which perfusion fluid flows out of the lithotripsy, blood clots, pus, tissue, etc. during the dressing procedure and is discharged outside the patient with the discharge channel.

According to another aspect of the present invention, there is provided an intrathecal infusion endoscope, a surgical instrument adapted for being passed along the intrathecal infusion endoscope into a patient for performing a surgical procedure,

the intrathecal infusion endoscope includes:

the inner core assembly comprises a front section extending part, a middle section connecting part and a rear section operating part, and is provided with a discharge channel, the front section extending part, the middle section connecting part and the rear section operating part are integrally connected, the front section extending part is suitable for extending from back to front into the main channel, the middle section connecting part limits the rear section operating part outside a patient, the discharge channel converges from the front section extending part and is separated from the rear section operating part, a perfusion channel is formed between the sheath main body and the front section extending part, and the surgical instrument is suitable for entering the patient through the discharge channel and is matched with the perfusion channel and the discharge channel to realize the suction and discharge integration in the surgical process.

According to one embodiment of the invention, the rear operating portion comprises a gripping body providing a gripping space and at least one control unit provided to the gripping body, the operator being adapted to control the bending of the front extension by operating the control unit.

According to one embodiment of the invention, the rear operating portion has a discharge access opening and an instrument access opening, the discharge access opening and the instrument access opening being provided to the grip body, the discharge access opening and the instrument access opening being spaced apart and independently, the surgical instrument being adapted to be advanced from the rear toward the front into the patient's body along the discharge access opening.

According to one embodiment of the invention, wherein the radial cross-sectional area of the discharge channel is larger than the discharge access opening and the instrument access opening, respectively, the surgical instrument is in close proximity when the surgical instrument is located within the instrument access opening to provide stability of operation.

Drawings

FIG. 1 is a schematic view of an overall view of an intrathecal infusion endoscope according to a preferred embodiment of the present invention.

Fig. 2 is an exploded view of the intrathecal infusion endoscope according to the preferred embodiment of the present invention.

Fig. 3 is a schematic side perspective view of the intrathecal infusion endoscope according to the preferred embodiment of the present invention.

Fig. 4 is an enlarged partial perspective view showing an operation state of the intrathecal infusion endoscope according to the preferred embodiment of the present invention.

Fig. 5 is an overall schematic view of an intrathecal infusion endoscope according to a second preferred embodiment of the present invention.

Fig. 6 is an exploded view of the intrathecal infusion endoscope according to the preferred embodiment of the present invention.

Fig. 7 is a schematic side perspective view of the intrathecal infusion endoscope according to the preferred embodiment of the present invention.

Fig. 8 is a partially enlarged perspective view showing an operation state of the intrathecal infusion endoscope according to the preferred embodiment of the present invention.

Detailed Description

The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present invention.

It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.

As shown in fig. 1 to 4, an intrathecal infusion endoscope 1 according to a preferred embodiment of the present invention is illustrated. The intrathecal infusion endoscope 1 is suitable for being applied to a natural channel operation of a human body, and an operator is suitable for entering a patient along the natural channel of the human body by controlling the intrathecal infusion endoscope 1. The inter-sheath perfusion endoscope 1 integrates the functions of perfusion, suction, visualization and illumination. The intrathecal infusion endoscope 1 is adapted to be passed into a patient to accommodate and distract a natural passageway in the patient for subsequent surgical procedures. Thus, the intrathecal infusion endoscope 1 also has bendable properties such that the intrathecal infusion endoscope 1 can be extended a distance into the patient to accommodate more surgical operating environments.

For convenience of description, the inter-sheath perfusion endoscope 1 is defined such that the advancing direction of the inter-sheath perfusion endoscope 1 is defined as a front end and vice versa during a surgical operation. When the intrathecal infusion endoscope 1 is operated, the front end is often located in the patient and the rear end is located outside the patient.

The intrathecal infusion endoscope 1 includes a sheath assembly 10 and a core assembly 20. The sheath assembly 10 is removably mounted to the exterior of the core assembly 20. Further, the sheath assembly 10 is detachably mounted to the core assembly 20 from front to back. The sheath assembly 10 has the effect of expanding the natural passageway of the patient. The sheath assembly 10 is adapted to create a passageway that communicates between the inside and outside of a patient. The sheath assembly 10 has a flexible property, wherein in one embodiment, when the sheath assembly 10 is positioned in a patient, the sheath assembly 10 is positioned outside the core assembly 20, and the sheath assembly 10 drives the core assembly 20 to bend; in another embodiment, the sheath assembly 10 is passively bent after the core assembly 20, which is actively controlled by an operator to bend. Thus, the sheath assembly 10, in cooperation with the core assembly 20, can enable surgical procedures within the natural passageway of a patient's body that extends in a curved manner.

In the present embodiment, the intrathecal infusion endoscope 1 is defined to have two states: an insertion state and a surgical state. When the inter-sheath perfusion endoscope 1 is in an inserted state, the sheath assembly 10 is firstly placed in a patient to play a role of expanding a natural channel; when the intrathecal infusion endoscope 1 is in the operative state, the inner core assembly 20 is positioned inside the sheath assembly 10, and the intrathecal infusion endoscope 1 is adapted to cooperate with a surgical instrument to perform the corresponding operative procedure. In this embodiment, the surgical instrument is embodied as a laser. The surgical instrument is adapted to be passed into the core assembly 20. In a refinement, the surgical instrument extends from the rear end to the front end along the inner core assembly 20, and the integration of lithotripsy, perfusion and suction is realized by matching with the sheath assembly 10 and the inner core assembly 20. In detail, an operator performs a lithotripsy operation through the surgical instrument, a perfusion operation through cooperation of the sheath assembly 10 and the core assembly 20, and a suction operation through the core assembly 20.

The sheath assembly 10 includes a sheath body 11 and a rear locking member 12, the sheath body 11 providing an installation space, the rear locking member 12 being disposed at a rear end of the sheath body 11. In this embodiment, the rear end locking element 12 is embodied as a sealing ring. The sheath body 11 provides a function of proper bending. The sheath body 11 is adapted to be extended into a patient. The sheath body 11 is implemented to be actively bendable or passively bendable, and the bending characteristics of the sheath body 11 are not limited by the present invention. When the inter-sheath perfusion endoscope 1 is in an inserted state, the sheath main body 11 is placed in a patient; when the inter-sheath infusion endoscope 1 is in a surgical state, the sheath body 11 is located outside of the inner core assembly 20. The core assembly 20 is connected to the sheath body 11 by the rear lock 12. The sheath body 11 provides a front end infusion function. When the sheath body 11 is mounted to the outside of the core assembly 20, perfusate is blocked from front to back by the back end lock 12. Stated another way, when the sheath body 11 and the core assembly 20 are mounted to each other, the back-end locking member 12 maintains the perfusion function provided by the sheath body 11, thereby preventing perfusion fluid from flowing out from the back end.

The sheath assembly 10 has a filling port 13 and a main channel 14, the filling port 13 is disposed at the rear end of the sheath body 11, and the main channel 14 penetrates through the front and rear end surfaces of the sheath body 11. The main channel 14 is adapted for placement of the core assembly 20 therein. That is, the core assembly 20 is adapted to be received within the primary channel 14. Stated another way, the primary channel 14 is adapted to provide front end mounting of the core assembly 20. The pouring port 13 is provided at the rear end side portion of the sheath body 11, and the pouring port 13 communicates with the main passage 14. The operator is adapted to provide the irrigation function from the outside and the rear end to the front end and the inside through said irrigation port 13.

The core assembly 20 includes a front-stage extension 21, a middle-stage connection 22 and a rear-stage operation 23, and the front-stage extension 21, the middle-stage connection 22 and the rear-stage operation 23 are integrally connected. The front end of the middle section connecting part 22 is connected to the front section extending part 21, and the rear end is connected to the rear section operating part 23. The anterior segment extension 21 is positioned within the sheath assembly 10 when the intrathecal infusion endoscope 1 is in the operative state. The midsection connection 22 corresponds to the end of the sheath assembly 10. The rear end operating portion 23 is located outside the patient. In a refinement, the front extension 21 is disposed inside the sheath body 11 and the middle connection 22 is blocked by the rear locking member 12 and prevented from entering the inside of the main channel 14 when the inter-sheath perfusion endoscope 1 is in a surgical state. The rear operating section 23 is located outside the patient and is controlled by the operator. The anterior-segment extension 21 has a bendable nature to extend into the main channel 14 of the sheath body 11 that is secured to the natural channel of the patient. The middle connecting portion 22 has a connecting function, and in another embodiment, the middle connecting portion 22 may cooperate with the rear end locking member 12 to implement the mutual snap-fit installation of the sheath assembly 10 and the core assembly 20. The rear end operating portion 23 has a function of controlling and operating the core assembly 20, and the function of the front portion of the core assembly 20 is achieved by the rear end operating portion 23 outside the patient's body.

It should be noted that the inter-sheath perfusion endoscope 1 further has a perfusion channel 30, and the perfusion channel 30 is located between the sheath assembly 10 and the core assembly 20. In a refinement, the sheath assembly 10 is located outside the core assembly 20 when the inter-sheath perfusion endoscope 1 is in a surgical state. Further, the anterior-segment extension 21 is located within the main channel 14. The perfusion channel 30 is located between the sheath body 11 and the anterior-segment extension 21. That is, the gap between the sheath body 11 and the anterior-segment extension 21 forms the irrigation channel 30. In the present exemplary embodiment, the filling duct 30 is embodied in the form of a ring in a radial plane. The perfusion channel 30 provides a perfusion function. The pouring port 13 communicates with the pouring channel 30. The operator is adapted to direct the perfusion fluid through said perfusion opening 13 towards said perfusion channel 30. The priming fluid is adapted to prime from the front face of the priming channel 30 from back to front and is blocked at the rear end by the rear lock 12. That is, the rear locking member 12 restricts the outflow of the perfusate from the front end to the rear end of the perfusion channel 30.

The front extension 21 includes a mirror body 211, and the mirror body 211 provides various functions of the front surface. The operator is adapted to view the front end of the body 211 through the patient to effect a visual surgical procedure. The scope body 211 is disposed within the main channel 14 when the intrathecal infusion endoscope 1 is in a surgical state. The perfusion channel 30 is formed between the scope body 211 and the sheath body 11.

The rear operating portion 23 includes a grip body 231 and at least one control unit 236, and the grip body 231 provides a space for an operator to grip and provides an installation space for the control unit 236. The control unit 236 is provided to the grip body 231. The grip body 231 is located outside the patient's body when the intrathecal infusion endoscope 1 is in a surgical state. The control unit 236 is located outside the patient. The grip body 231 is gripped and controlled by an operator. In the present embodiment, the control unit 236 is adapted to control the front end bending of the mirror body 211, i.e. the mirror body 211 has an active bending function. In another embodiment, the mirror body 211 itself has a bendable property, and when mounted in the main channel 11, the mirror body 211 is constrained inside the main channel 14 provided by the bent sheath body 11, creating a bend, i.e. the mirror body 211 has a passive bending function. The present invention provides the mirror body 211 with flexibility, and whether the mirror body 211 is active or not is not limited by the present invention. An alternative implementation of the mirror body 211 in this embodiment is: a spiral spring coil type, a serpentine structure, or the like has a structure biased to one side to support the bending characteristics of the mirror main body 211.

It is further noted that the core assembly 20 has a discharge passage 24, the discharge passage 24 is provided at the front end of the front-stage extension 21, and the discharge passage 24 penetrates the front end surface of the mirror main body 211 and the rear end surface of the rear-stage operation portion 23. Stated another way, the discharge passage 24 extends through the rear end surface of the grip body 231 to the front end surface of the mirror body 211. The exhaust passage 24 is adapted to communicate between the inside and outside of the patient. The perfusion fluid is adapted to be discharged outside the patient's body through said discharge channel 24. In this embodiment, the discharge channel 24 also serves as a working channel, i.e. the surgical instrument is also adapted to extend forward from the rear end of the discharge channel 24 for performing a surgical operation.

In particular, in the surgical state of the inter-sheath irrigation endoscope 1, the irrigation channel 30 is provided between the sheath body 11 and the scope body 211 as viewed in a distal end surface radial plane. The discharge passage 24 is provided to the mirror main body 211. Since the sheath body 11 functions as a passage in which the outer circumferential side directly contacts the patient during the surgical operation, the radial area of the outer circumferential wall of the sheath body 11 is maximized. The radial area of the sheath body 11 thus determines the size of the access to the natural passageway of the patient that the intrathecal infusion endoscope 1 can address. That is, the radial area of the sheath body 11 is determined to be suitable for a natural passage of a patient. By properly enlarging the discharge channel 24, the discharge efficiency of crushed stone is improved, while the overall size of the inter-sheath perfusion endoscope 1 is unchanged. The perfusion fluid flows out from the perfusion channel 30 of the ring towards the front end and is eventually discharged outside the body from the discharge channel 24 towards the radial center. The perfusion channel 30 provides only a perfusion cleaning function, whereby the radial area of the perfusion channel 30 can be reduced. Indirectly, the overall size of the lens body 211 may be increased, so that the radial area of the discharge channel 24 disposed on the end surface of the lens body 211 may be increased, so that the discharge channel 24 may be larger, so that crushed stone, tissues, etc. are discharged, and problems caused by blockage are avoided.

On the other hand, the radial area of the discharge passage 24 is enlarged, and the radial area of the mirror main body 211 is increased. From a manufacturing process perspective, the requirements for the manufacturing process of the core assembly 20 are reduced, thereby reducing the precision required for manufacturing as well as the manufacturing costs. In experimental simulation, the perfusion irrigation is performed to the operation position through the relatively narrow perfusion channel 30, and finally the perfusion liquid is circulated through the discharge channel 24, so that part of tissues, crushed stones and the like are wrapped and discharged out of the patient. Thus, the degree of narrowing of the irrigation channel 30 does not affect the surgical success of the intrathecal infusion endoscope 1. The perfusion channel 30 only needs to fulfill the function of supplying the perfusion fluid to the front end.

The rear operating portion 23 further has a visual access opening 232 and at least one illumination access opening 233. The visual access opening 232 is provided on the side surface of the grip body 231 in the rear operation unit 23. The front-stage extension 21 extends to the front end surface of the mirror main body 211. The visual access port 232 has a visual function of providing a visual operation environment to the front end surface of the mirror main body 211. The illumination entrance 233 has an illumination function. Illumination is provided at the front face of the mirror body 211 to facilitate a visual operating environment. For aesthetic purposes, in the present embodiment, the illumination access ports 233 are implemented as a pair. That is, the illumination access ports 233 are provided on both sides of the viewing access port 232 on the front end surface of the mirror main body 211. The visual access port 232 and the illumination access port 233 are spaced apart from each other and from the discharge passage 24.

In another embodiment of the present invention, the visual access button 232 and the illumination access port 233 are implemented as the same channel, that is, the visual and illumination functions are performed through a common channel. Accordingly, the number of channels corresponding to the front-stage extending portion 21 and the rear-stage operating portion 23 is reduced by one, and is implemented as a common number.

Exemplary description of the procedure for use of the intrathecal infusion endoscope 1: the sheath assembly 10 may be accompanied by a guide dilator into the patient's body as the intrathecal infusion endoscope 1 transitions to the insertion state. The guide expansion member is provided in the main channel 14 of the sheath main body 11. The natural passageway of the patient is opened by the taper of the leading dilator's front section and the leading dilator is eventually withdrawn, retaining the sheath body 11 within the patient. And then into the core assembly 20, the core assembly 20 being maintained within the pour opening 13 of the sheath body 11. The front extension 21 is retained within the main channel 14. The perfusion channel 30 is formed between the scope body 211 and the sheath body 11. At this time, the inter-sheath perfusion type endoscope 1 is integrated with perfusion and suction by the perfusion channel 30 and the discharge channel 24 located at the scope main body 211. The visual access port 232 and the illumination access port 233 on the front face of the mirror body 211 provide visual and illumination functions. The surgical instrument is adapted for performing a surgical procedure from the back to the front through the discharge channel 24. The surgical instrument is always subjected to irrigation and aspiration during the surgical procedure. Illustratively, in the embodiment of the invention, when the surgical instrument is implemented as holmium laser, the local in-vivo tissue temperature is reduced by the circulation of the perfusion fluid during thermal operations such as lithotripsy, by the integrated perfusion and suction. Avoiding tissue injury of the patient and prolonging the recovery time of the patient.

It is further noted that the mirror body 211 abuts against the inner wall of the sheath body 11 when the mirror body 211 is positioned in the main channel 14 due to the narrowing of the perfusion channel 30. When the operator operates the rear-stage operation portion 23 to further control the front-stage extension portion 21, the scope main body 211 is limited in the limited range of the sheath main body 11, and has a certain movable space, but can still relatively easily maintain the movement of the scope main body 211 in the sheath main body 11, so as to reduce the difficulty of controlling the inner core assembly 20 by the operator.

Fig. 5 to 8 show an intrathecal infusion endoscope 1A according to a second preferred embodiment of the present invention. The inter-sheath perfusion endoscope 1 integrates the functions of perfusion, suction, visualization and illumination. The intrathecal infusion endoscope 1A is adapted to be passed into a patient to accommodate and distract a natural passageway in the patient for subsequent surgical procedures. Thus, the intrathecal infusion endoscope 1A also has a bendable property such that the intrathecal infusion endoscope 1A can be extended a distance into the patient to accommodate more surgical operating environments. The inter-sheath perfusion endoscope 1A of the present embodiment is changed in the channel for discharging the perfusion fluid as compared with the above-described embodiment.

The intrathecal infusion endoscope 1A includes a sheath assembly 10A and a core assembly 20A. The sheath assembly 10A is removably mounted to the exterior of the core assembly 20A. Further, the sheath assembly 10A is detachably mounted to the core assembly 20A from front to back. The sheath assembly 10A has the effect of distracting the patient's natural passageway. The sheath assembly 10A is adapted to create a passageway that communicates between the inside and outside of the patient. The sheath assembly 10A has flexible properties.

The sheath assembly 10A includes a sheath body 11A and a rear locking member 12A, the sheath body 11A providing an installation space, the rear locking member 12A being disposed at a rear end of the sheath body 11A. The sheath body 11A provides a function of proper bending. The sheath body 11A is adapted to be extended into a patient. The core assembly 20A is connected to the sheath body 11A by the back end lock 12A. The sheath body 11A provides a function of front end infusion. When the sheath body 11A and the core assembly 20A are mounted to each other, the pouring function provided by the sheath body 11A is maintained by the rear-end locking member 12A, and the pouring liquid is prevented from flowing out from the rear end.

The sheath assembly 10A has a filling port 13A and a main channel 14A, the filling port 13A is disposed at the rear end of the sheath body 11A, and the main channel 14A penetrates through the front and rear end surfaces of the sheath body 11A. The main channel 14A is adapted for placement of the core assembly 20A therein. The pouring port 13A is provided at the rear end side portion of the sheath body 11A, and the pouring port 13A communicates with the main passage 14A. The operator is adapted to provide the irrigation function from the outside and the rear end to the front end and the inside through the irrigation port 13A.

The core assembly 20A includes a front-stage extension portion 21A, a middle-stage connecting portion 22A, and a rear-stage operating portion 23A, the front-stage extension portion 21A, the middle-stage connecting portion 22A, and the rear-stage operating portion 23A being integrally connected. The middle connecting portion 22A has a front end connected to the front-stage extending portion 21A and a rear end connected to the rear-stage operating portion 23A. When the inter-sheath perfusion endoscope 1A is in the operative state, the front-stage extension 21A is provided inside the sheath main body 11A, and the middle-stage connection 22A is blocked by the rear-end locking member 12A and prevented from entering the inside of the main channel 14A. The rear-stage operation unit 23A is located outside the patient and is controlled by the operator.

The intrathecal infusion endoscope 1A further has an infusion channel 30A, the infusion channel 30A being located between the sheath assembly 10A and the core assembly 20A. The gap between the sheath body 11A and the anterior-segment extension 21A forms the irrigation channel 30A. In the present exemplary embodiment, the perfusion channel 30A is embodied in the form of a ring in a radial plane. The perfusion channel 30A provides a perfusion function. The pouring port 13A communicates with the pouring passage 30A. The operator is adapted to direct the perfusion fluid through said perfusion opening 13A towards said perfusion channel 30A. The priming fluid is adapted to prime from the front face of the priming channel 30A from back to front and is blocked at the rear end by the rear lock 12A.

The front extension 21A includes a mirror body 211A, and the mirror body 211A provides various functions of the front surface. The operator is adapted to view the front end of the patient through the mirror body 211A to effect a visual surgical procedure. The perfusion channel 30A is formed between the scope body 211A and the sheath body 11A.

The rear operating portion 23A includes a grip body 231A and at least one control unit 236A, the grip body 231A providing a space for an operator to grip and providing an installation space for the control unit 236A. The control unit 236A is provided to the grip body 231A.

The rear operating portion 23A further has a visual access opening 232A and at least one illumination access opening 233A. The visual access port 232A is provided on the side surface of the grip body 231A in the rear operation section 23A. The front-stage extension 21A extends to the front end surface of the mirror main body 211A. The visual access port 232A has a visual function of providing a visual operation environment to the front end surface of the mirror main body 211A. The illumination entrance 233A has an illumination function. Illumination is provided at the front end face of the mirror main body 211A so as to realize a visualized operation environment. The visual access port 232A and the illumination access port 233A are spaced apart independently from each other. Likewise, in another embodiment, the visual access port 232A and the illumination access port 233A may be implemented as a common channel.

It should be noted that, in the present embodiment, the core assembly 20A further has a discharge channel 24A, and the discharge channel 24A is different from the above embodiment, and the discharge channel 24A is disposed at a front section of the mirror body 211A and extends to the grip body 231A. Further, the channel radial area of the discharge channel 24A in the mirror main body 211A is larger than the channel radial area of the grip main body 231A.

The rear operating portion 23A further has a discharge access port 234A and an instrument access port 235A. The discharge port 234A and the instrument port 235A are provided to the grip body 231A, respectively. That is, the discharge access port 234A and the instrument access port 235A are spaced apart from each other. The drain access port 234A is adapted to drain impurities such as perfusate or tissue from the posterior segment, and the instrument access port 235A is adapted to be accessed by the surgical instrument. Stated another way, at the front end of the mirror body 211A, the discharge port 234A and the instrument port 235A intersect with each other to form the discharge channel 24A, and a single channel is formed at the front end face of the mirror body 211A; at the grip body 231A, the instrument access port 235A is provided at a rear side of the grip body 231A, and the discharge access port 234A is provided to extend to a rear end surface of the grip body 231A. When the intrathecal infusion endoscope 1A is in a surgical state, an operator accesses the surgical instrument from the back to the front through the instrument access port 235A. The surgical instrument eventually extends along the anterior segment of the discharge channel 24A. The surgical instrument performs a surgical operation on the front end of the scope body 211A. An irrigation operation is provided through the irrigation channel 30A while the surgical instrument is in operation. The perfusate being perfused is entrained with the tissue impurities, etc., cut, morcellated by the surgical instrument, first pass through the discharge channel 24A and finally are discharged from front to back along the discharge access port 234A to the outside of the patient.

In comparison with the above-described embodiment, the channel of the intrathecal infusion endoscope 1A is provided such that the discharge port 234A and the instrument port 235A are spaced apart from each other independently from the grip body 231 of the posterior operation section 23A. It is maintained that the surgical instrument occupies a single dedicated channel when it enters the intrathecal infusion endoscope 1A. The instrument access port 235A serves as a dedicated channel for the surgical instrument, guiding the surgical instrument to extend into from the instrument access port 235A. The surgical instrument enters through a special channel to keep the stability of the surgical instrument after being introduced. That is, the surgical instrument maintains a strong stability during operation through the instrument access port 235A, reducing the difficulty of the operator.

Exemplary description of the procedure for use of the intrathecal infusion endoscope 1A: the sheath assembly 10A may be accompanied by a guide dilator into the patient's body as the intrathecal infusion endoscope 1A transitions to the insertion state. The guide expansion member is disposed in the main channel 14A of the sheath body 11A. The natural passageway of the patient is distracted by the taper of the leading dilator's forward section and the leading dilator is eventually withdrawn, retaining the sheath body 11A within the patient. And then into the core assembly 20A, the core assembly 20A being maintained within the pour opening 13A of the sheath body 11A. The front-stage extension 21A is held within the main channel 14A. The perfusion channel 30A is formed between the mirror body 211A and the sheath body 11A. At this time, the inter-sheath irrigation type endoscope 1A achieves an irrigation and suction integrated body through the irrigation channel 30A and the discharge channel 24A located in the scope main body 211A. The visual access port 232A and the illumination access port 233A located at the front end face of the mirror main body 211A provide visual and illumination functions. The surgical instrument is adapted to extend from back to front through the instrument access port 235A and ultimately to perform a surgical procedure at the front end of the discharge channel 24A. The surgical instrument is always subjected to irrigation and aspiration during the surgical procedure.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.

Claims

1. An intrathecal infusion endoscope, a surgical instrument adapted for surgical manipulation along said intrathecal infusion endoscope into a patient, comprising:

2. The intrathecal infusion endoscope of claim 1, wherein the sheath assembly has an infusion port disposed on a rear side of the sheath body, the infusion port being in communication with the main channel, the infusion port being adapted to be in communication with the infusion channel formed between the sheath body and the anterior segment extension, an operator being adapted to provide infusion of an infusion fluid into a patient through the infusion port.

3. The intrathecal infusion endoscope of claim 2, wherein the sheath assembly includes a rear locking member disposed on a rear end face of the sheath body, the rear locking member restricting the intermediate section connecting portion and the rear section operating portion from entering the patient when the intrathecal infusion endoscope is in the operative state.

4. The intrathecal infusion endoscope of claim 3, wherein the rear end lock blocks the flow of the infusion fluid in the infusion channel from the anterior segment to the rear end at the mid-segment junction.

5. The intrathecal infusion endoscope of claim 1, wherein the anterior segment extension includes a scope body adapted to be disposed within the main channel, the radial area of the sheath body being greater than the radial area of the scope body.

6. The intrathecal infusion endoscope as in claim 5, wherein the posterior segment manipulator includes a grip body providing grip and mounting space and at least one control unit provided to the grip body, an operator controlling bending of the scope body by manipulating the control unit.

7. The intrathecal infusion endoscope as in claim 6 wherein the endoscope body and the sheath body are cooperatively bendable to accommodate a natural passageway of a patient.

8. The intrathecal infusion endoscope as in claim 5, wherein the posterior segment manipulator has a visual access port and an illumination access port, the visual access port and the illumination access port being disposed to the grip body, respectively, the visual access port and the illumination access port extending to the anterior face of the scope body, respectively, to provide illumination and visualization functions.

9. The intrathecal infusion endoscope as in claim 8 wherein the discharge channel, the visualization portal and the illumination portal are spaced apart from one another at a forward end face of the scope body, the surgical instrument being maintained in a visually illuminated environment as it extends from the discharge channel to a forward portion of the forward end face of the scope body.

10. The intrathecal infusion endoscope as in claim 9 wherein the infusion channels are distributed on a peripheral side of the drainage channel from which infusion fluid flows out of lithotripsy, blood clots, pus, tissue, etc. during the procedure and is drained out of the patient with the drainage channel.

11. An intrathecal infusion endoscope, a surgical instrument adapted for surgical manipulation along said intrathecal infusion endoscope into a patient, comprising:

12. The intrathecal infusion endoscope of claim 11, wherein the posterior segment manipulator includes a grip body providing a grip space and at least one control unit disposed to the grip body, the operator adapted to control bending of the anterior segment extension by manipulating the control unit.

13. The intrathecal infusion endoscope of claim 12, wherein the posterior segment manipulator has an exit port and an instrument port, the exit port and instrument port being disposed in the grip body, the exit port and instrument port being spaced apart and independently, the surgical instrument being adapted to be advanced from posterior to anterior along the exit port into the patient.

14. The intrathecal infusion endoscope of claim 13, wherein the radial cross-sectional area of the drainage channel is greater than the drainage access port and the instrument access port, respectively, the surgical instrument being positioned in close proximity when the surgical instrument is positioned within the instrument access port to provide stability of operation.

15. The intrathecal infusion endoscope as in claim 14 wherein the posterior segment manipulator has a visual access port and an illumination access port, the visual access port and the illumination access port being disposed to the grip body, respectively, the visual access port and the illumination access port extending to the anterior face of the scope body, respectively, to provide illumination and visualization functions.