CN111803142A

CN111803142A - Endoscope biopsy forceps

Info

Publication number: CN111803142A
Application number: CN202010337358.9A
Authority: CN
Inventors: 王强; 吴晰; 杨爱明
Original assignee: Peking Union Medical College Hospital Chinese Academy of Medical Sciences
Current assignee: Peking Union Medical College Hospital Chinese Academy of Medical Sciences
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2020-10-23
Anticipated expiration: 2040-04-26
Also published as: CN111803142B

Abstract

The present disclosure relates to an endoscopic biopsy forceps comprising: an operating lever; a slip ring; a drive wire fixedly connected at a first end to the slip ring; a flexible sleeve having a first end fixedly connected to the lever, the drive wire being received in the flexible sleeve; and the clamp head comprises a base, a first clamp claw, a second clamp claw, a first connecting rod and a second connecting rod. The first end of the base is connected to the second end of the flexible sleeve; the first ends of the first and second jaws are closer to the first end of the base than the respective second ends; second ends of the first and second jaws are pivotally connected to a second end of the base, respectively; the first ends of the first connecting rod and the second connecting rod are respectively and pivotally connected to the second end of the transmission guide wire; the second ends of the first and second links are pivotally connected between the respective first and second ends of the first and second jaws, respectively. Endoscopic biopsy forceps according to the present disclosure facilitate the taking of tissue samples from the inner wall of a lumen.

Description

Endoscope biopsy forceps

Technical Field

The disclosure relates to the technical field of medical instruments, in particular to an endoscope biopsy forceps.

Background

In hospitals, it is often necessary to use endoscopic biopsy forceps to take samples from tissue forceps surrounding the inner wall of a body lumen (e.g., bile duct, esophagus, cardia, pylorus, intestine, etc.) under endoscopic monitoring.

However, the jaws of endoscopic biopsy forceps in the related art are usually open towards the front, so the biopsy forceps are only able to take a sample upstream of the tissue, i.e. the biopsy forceps need to be open upstream of the tissue. However, the diseased tissue surface is often covered by normal epithelium, and the diseased tissue is not available from the upstream surface; sometimes, the forceps head of the biopsy forceps needs to extend into the tissue surrounding the inner wall of the human body cavity, but when the annular cavity lesion blocks the cavity and the movable gap of the biopsy forceps is small, the forceps head cannot be opened under the pressure of the tissue, so that the lesion tissue cannot be taken forward. Particularly, when obstructive jaundice is caused by occupation in a bile duct, the positive rate of cell brushing detection and common positive biopsy forceps under the X-ray guidance of Endoscopic Retrograde Cholangiopancreatography (ERCP) is low. If the opening of the biopsy forceps is reversed, the lesion tissues can be hooked/cut reversely when the inside and the outside of the lumen blocked by the lesion recede, so that the purpose of biopsy is achieved, and the positive rate is improved. Meanwhile, the biopsy forceps are provided with a hollow guide wire channel, so that the operation can be guided by the guide wire in the bile duct, and the convenience and the accuracy of the operation are obviously improved. The same condition can be applied to the similar pathological changes of esophagus, cardia, pylorus and intestinal tract.

Accordingly, there is a need in the art to provide endoscopic biopsy forceps that are simpler and more convenient to operate.

Disclosure of Invention

The present disclosure is directed to solving, at least to some extent, one of the technical problems in the related art. In order to solve the above problems, the present disclosure provides an endoscopic biopsy forceps which can simplify the operation and facilitate the use.

An endoscopic biopsy forceps according to an embodiment of the present disclosure includes: an operating rod having opposing first and second ends; a slip ring slidably disposed to the operating rod; a drive wire including opposing first and second ends, the first end of the drive wire fixedly connected to the slip ring; a flexible sleeve having opposite first and second ends, the first end of the flexible sleeve being fixedly connected to the second end of the lever, the drive wire being received in the flexible sleeve; the clamp head comprises a base, a first clamp claw, a second clamp claw, a first connecting rod and a second connecting rod; the base includes opposing first and second ends, the first end of the base being connected to the second end of the flexible sleeve; the first jaw includes opposing first and second ends, the first end of the first jaw being closer to the first end of the base than the second end of the first jaw, the second end of the first jaw being pivotally connected to the second end of the base; the second jaw includes opposing first and second ends, the first end of the second jaw being closer to the first end of the base than the second end of the second jaw, the second end of the second jaw being pivotally connected to the second end of the base; the first link includes opposing first and second ends, the first end of the first link being pivotally connected to the second end of the drive wire, the second end of the first link being pivotally connected between the first and second ends of the first jaw; the second link includes opposing first and second ends, the first end of the second link being pivotally connected to the second end of the drive wire, and the second end of the second link being pivotally connected between the first and second ends of the second jaw.

According to the endoscope biopsy forceps disclosed by the embodiment of the disclosure, when a user operates the sliding ring to slide relative to the operating rod, the sliding ring can drive the transmission guide wire to slide in the flexible sleeve, so that the transmission guide wire drives the first jaw and the second jaw to pivot around the respective second ends through the first connecting rod and the second connecting rod respectively, and the first jaw and the second jaw can be switched between the closed state and the open state. Thus, endoscopic biopsy forceps according to embodiments of the present disclosure can be opened downstream of the tissue, and under compression of the tissue itself, a portion of the tissue readily enters between the opened first and second jaws, facilitating the biopsy forceps in taking samples, thereby simplifying and facilitating the operation of the biopsy forceps.

In addition, the rotation direction changing device according to the above-described embodiment of the present disclosure may also have the following additional technical features.

According to some embodiments of the present disclosure, the first jaw has a first engagement surface and the second jaw has a second engagement surface, the first engagement surface being opposite the second engagement surface; the binding clip has a closed state in which the first and second engagement surfaces abut and an open state; in the open state, the first engagement surface and the second engagement surface are angled therebetween. Thereby, an open state and a closed state of the bioptome are achieved.

According to some embodiments of the present disclosure, the first engagement surface has a first serrated shape, the second engagement surface has a second serrated shape, and the first serrated shape is complementary to the second serrated shape. Thereby facilitating the taking of the sample from the tissue forceps and the secure clamping of the sample.

According to some embodiments of the present disclosure, the first jaw defines a first cavity recessed from the first engagement surface, the second jaw defines a second cavity recessed from the second engagement surface, the first and second cavities forming a receiving space in the closed state. Thereby facilitating the clamping of larger volumes of sample and their storage.

According to some embodiments of the present disclosure, the first jaw is provided with a first shank at a second end thereof; the second jaw is provided with a second handle at a second end thereof, the first handle being pivotally connected to the second handle. Thereby, the pivotal connection between the first jaw, the second jaw and the base is simplified.

According to some embodiments of the present disclosure, the first shank portion is formed with a first pivot hole passing transversely through the first jaw axis; the second handle portion is formed with a second pivot hole passing through the second jaw axis; and the first pivot hole and the second pivot hole are aligned. Thereby, the pivotal connection structure between the first and second jaws and the base can be further simplified.

According to some embodiments of the present disclosure, the first jaw is formed with a downwardly extending first shaft portion at a mid-portion thereof for pivotally connecting with the second end of the first link; the second jaw has a downwardly extending second shaft portion formed at a mid-portion thereof for pivotally connecting with the second end of the second link. Thereby facilitating pivotal connection between the first jaw and the first shaft portion and the second jaw and the second shaft portion.

According to some embodiments of the present disclosure, the base forms a cutout at the second end thereof, the first jaw and the second jaw being received within the cutout. Therefore, the structure of the tong head can be compact.

According to some embodiments of the present disclosure, the base further defines a slot extending through the base in a direction transverse to the base axis, and the slot communicates with the cutout such that the first link and the second link can be received within the slot. Thereby, the first and second links can be connected to the first and second jaws, respectively.

According to some embodiments of the present disclosure, the base is further formed with a second channel extending along the base axis, the second channel communicating with the slot and opening toward the first end of the base such that the second end of the drive wire passes through the second channel of the base and extends into the slot to pivotally connect with the first end of the first link and the first end of the second link, respectively. Therefore, when the slip ring is operated, the first jaw and the second jaw can be opened or closed through the transmission guide wire, the first connecting rod and the second connecting rod.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Further features and advantages of the invention are seen in the following description, which explains the invention in more detail on the basis of embodiments, in conjunction with the drawings.

FIG. 1 is a front view of an endoscopic biopsy forceps according to one embodiment of the present disclosure.

FIG. 2 is a top view of an endoscopic biopsy forceps, according to one embodiment of the present disclosure, with the biopsy forceps in a closed state.

FIG. 3 is a top view of an endoscopic biopsy forceps, according to one embodiment of the present disclosure, with the biopsy forceps in an open state.

Fig. 4 is an enlarged view of a portion a in fig. 1.

Fig. 5 is a cross-sectional view of fig. 4.

Fig. 6 is a cross-sectional view of a portion of fig. 2.

Fig. 7 is a front view of a first jaw of a forcep head according to one embodiment of the present disclosure.

Fig. 8 is a top view of a first jaw of a forcep head according to one embodiment of the present disclosure.

Figure 9 is a front view of a second jaw of the binding clip according to one embodiment of the present disclosure.

Figure 10 is a top view of a second jaw of the binding clip according to one embodiment of the present disclosure.

Fig. 11 is a front view of the base of the jawarms according to one embodiment of the present disclosure.

Fig. 12 is a top view of a base of a jawarm according to one embodiment of the present disclosure.

Fig. 13 is a front view of the first link or the second link of the jawarms according to one embodiment of the present disclosure.

Fig. 14 is a top view of the first link or the second link of the jawarms according to one embodiment of the present disclosure.

FIG. 15 is a schematic representation of the operation of an endoscopic biopsy forceps according to one embodiment of the present disclosure, wherein the forceps head extends into the interior of the tissue to be sampled around the inner wall of a body lumen.

FIG. 16 is a schematic illustration of the operation of an endoscopic biopsy forceps according to one embodiment of the present disclosure, wherein the forceps head extends beyond the tissue to be sampled around the inner wall of a body lumen, and the forceps head is in a closed position.

FIG. 17 is a diagrammatic operational view of an endoscopic biopsy forceps according to one embodiment of the present disclosure with the forceps head extending beyond tissue to be sampled around an interior wall of a body lumen and with the forceps head in an open position.

FIG. 18 is a front view of an endoscopic biopsy forceps according to another embodiment of the present disclosure.

Fig. 19 is a sectional view of the portion B in fig. 18.

Fig. 20 is a front view of a first jaw of a forcep head according to another embodiment of the present disclosure.

Fig. 21 is a top view of a first jaw of a forcep head according to another embodiment of the present disclosure.

FIG. 22 is a front view of a second jaw of the binding clip according to another embodiment of the present disclosure.

Figure 23 is a top view of a second jaw of a forcep head according to another embodiment of the present disclosure.

Fig. 24 is a front view of a first jaw of a forcep head according to yet another embodiment of the present disclosure.

Fig. 25 is a top view of a first jaw of a forcep head according to yet another embodiment of the present disclosure.

Figure 26 is a front view of a second jaw of the binding clip according to yet another embodiment of the present disclosure.

FIG. 27 is a top view of a second jaw of the binding clip according to yet another embodiment of the present disclosure.

Fig. 28 is a front view of a first jaw of a forcep head according to yet another embodiment of the present disclosure.

Figure 29 is a top view of a second jaw of the binding clip according to yet another embodiment of the present disclosure.

Detailed Description

Preferred embodiments of the present disclosure are described below with reference to the accompanying drawings. It should be noted that the terms "upper", "lower", "left", "right", "front", "rear", "longitudinal", "transverse", "vertical" and the like are used herein for illustrative purposes only and are not intended to limit the present disclosure.

Endoscopic biopsy forceps according to embodiments of the present disclosure are described below with reference to the accompanying drawings. In fig. 1-29, orthogonal XYZ axes are illustrated for ease of description and orientation, where the X axis represents the longitudinal direction of the bioptome; the Y-axis represents the lateral direction of the bioptome; the Z-axis represents the vertical direction of the bioptome 1.

As shown in fig. 1, an endoscopic biopsy forceps 100 according to one embodiment of the present disclosure includes: a lever 10, a slip ring 20, a drive wire 30, a flexible sleeve 40, and a forcep head 50.

As shown in fig. 1, the lever 10 includes opposite first and second ends. The first end of the operating rod 10 is provided with a circular ring 12, which is convenient for a user to operate. The operating lever 10 defines a slide groove 14 between the first end and the second end, the slide groove 14 extending in an axial direction of the operating lever 10 (i.e., a longitudinal direction indicated by an X-axis in fig. 1) and penetrating the operating lever 10 transversely to the axial direction of the operating lever 10. The lever 10 defines a first channel 16 extending along the axis of the lever 10, the first channel 16 communicating with the runner 14 and being open towards the second end of the lever 10.

As shown in fig. 1, the slip ring 20 is slidably provided to the operation rod 10. Specifically, the slip ring 20 is fitted over the operating rod 10, and a portion of the slip ring 20 extends into the slide groove 14, so that the slip ring 20 can slide along the slide groove 14 of the operating rod 10, that is, the slip ring 20 can slide in the axial direction of the operating rod 10.

As shown in fig. 1 and 3, the drive wire 30 includes opposing first and second ends. A first end of the drive wire 30 is fixedly connected to the slip ring 20 and a second end of the drive wire 30 is connected to the tong head 50. Specifically, a first end of the drive wire 30 passes through the first passage 16 of the operating rod 10 and extends into the slide groove 14 of the operating rod 10, and is fixedly connected to a portion of the slip ring 20 received in the slide groove 14. Further, as shown in fig. 5, the second end of the driving wire 30 is provided with a coupling plate 32, and the coupling plate 32 is defined with a coupling hole 34 for coupling with the bit 50.

As shown in FIG. 1, the flexible sleeve 40 has opposite first and second ends, the first end of the flexible sleeve 40 is fixedly connected to the second end of the operating rod 10, and the second end of the flexible sleeve 40 is fixedly connected to the forcep head 50. It will be appreciated that the drive wire 30 is received within the flexible sleeve 40 and that as the user manipulates the slip ring 20 to slide along the operating rod 10, the slip ring 20 is able to carry the drive wire 30 to slide within the flexible sleeve 40.

As shown in fig. 2 and 3, the jaw 50 includes a base 51, a first jaw 52, a second jaw 53, a first link 54, and a second link 55.

Base 51 includes opposing first and second ends, with the first end of base 51 fixedly attached to the second end of flexible sleeve 40, and the second end of base 51 forming the tip of bioptome 100.

The first jaw 52 includes opposing first and second ends, the first end of the first jaw 52 being closer to the first end of the base 51 than the second end of the first jaw 52, the second end of the first jaw 52 being pivotally connected to the second end of the base 51. The second jaw 53 includes opposing first and second ends, the first end of the second jaw 53 being closer to the first end of the base 51 than the second end of the second jaw 53, the second end of the second jaw 53 being pivotally connected to the second end of the base 51.

The first link 54 includes opposite first and second ends, the first end of the first link 54 being pivotally connected to the second end of the drive wire 30, the second end of the first link 54 being pivotally connected between the first and second ends of the first jaw 52; a second link 55 includes opposite first and second ends, the first end of the second link 55 being pivotally connected to the second end of the drive wire 30, and the second end of the second link 55 being pivotally connected between the first and second ends of the second jaw 53.

Therefore, according to the endoscopic biopsy forceps 100 of the present embodiment, when the user operates the sliding ring 20 to slide relative to the operation rod 10, the sliding ring 20 can bring the transmission guide wire 30 to slide in the flexible sleeve 40, so that the transmission guide wire 30 respectively brings the first jaw 52 and the second jaw 53 to pivot around the respective second ends through the first link 54 and the second link 55, respectively, so that the first jaw 52 and the second jaw 53 can be switched between the closed state and the open state.

As shown in fig. 7-10, the first jaw 52 is substantially a quarter cylinder. The second jaw 53 is substantially a quarter cylinder. The first jaw 52 has a first engagement surface 522 and the second jaw 53 has a second engagement surface 532, the first engagement surface 522 being opposite the second engagement surface 532. In the closed state, the first engagement surface 522 and the second engagement surface 532 are closely fitted; in the open state the first engagement surface 522 and the second engagement surface 532 are angled.

As shown in fig. 8 and 10, the first engagement surface 522 has a first serrated shape, the second engagement surface 532 has a second serrated shape, and the first serrated shape is complementary to the second serrated shape. Thus, in the closed position, the first jaw 52 and the second jaw 53 can be brought into close engagement, thereby facilitating the clamping of a tissue sample.

As shown in FIGS. 7 and 9, the first jaw 52 further defines a first cavity 524 recessed from the first engagement surface 522, the second jaw 53 further defines a second cavity 534 recessed from the second engagement surface 532, and the first and

second cavities

524, 534 define a receiving space in the closed position for receiving removed body tissue from the clip.

As shown in fig. 7 and 9, the first jaw 52 is provided with a first shank portion 526 at the second end thereof, the first shank portion 526 being substantially plate-shaped. The second jaw 53 is provided with a second handle portion 536 at a second end thereof, the second handle portion 536 being substantially plate-shaped. The first handle portion 526 and the second handle portion 536 are pivotally connected.

Specifically, the first shank portion 526 extends beyond the first engagement surface 522 in a direction transverse to the axis of the first jaw 52, the first shank portion 526 forming a first pivot hole 5262 transversely through the axis of the first jaw 52; and the second shank 536 extends beyond the second engagement surface 532 in a direction transverse to the axis of the second jaw 53, the second shank 536 being formed with a second pivot hole 5362 transversely through the axis of the second jaw 53. The first pivot hole 5262 defines a pivot axis of the first jaw 52 and the second pivot hole 5362 defines a pivot axis of the second jaw 53. The first and

second pivot holes

5262 and 5362 are aligned such that the pivot axes of the first and

second jaws

52 and 53 coincide.

Also, as shown in fig. 1, 4 and 5, the first handle portion 526 is vertically offset from the second handle portion 536 such that pivoting between the first jaw 52 and the second jaw 53 does not interfere.

As shown in fig. 7 and 9, the first jaw 52 is formed at a middle portion thereof with a first shaft portion 528 extending downward for pivotally connecting with the second end of the first link 54. The second jaw 53 is formed at a middle portion thereof with a second shaft portion 538 extending downward for pivotally connecting with a second end of the second link 55.

As shown in fig. 13 and 14, the first link 54 defines first and second through-holes 542, 544 at first and second ends thereof, respectively, the first through-hole 542 of the first link 54 defining a pivot axis of the first end of the first link 54, and the second through-hole 544 of the first link 54 defining a pivot axis of the second end of the first link 54; the second link 55 defines first and second through-holes 552 and 554, respectively, at first and second ends thereof, the first through-hole 552 of the second link 55 defining a pivot axis of the first end of the second link 55, and the second through-hole 554 of the second link 55 defining a pivot axis of the second end of the second link 55.

As shown in fig. 4 and 5, the coupling plate 32 of the drive wire 30 is sandwiched between the first end of the first link 54 and the first end of the second link 55, and the first through hole 542 of the first link 54, the first through hole 552 of the second link 55, and the coupling hole 34 of the drive wire 30 are aligned so that the pivot axes of the first end of the first link 54 and the first end of the second link 55 coincide.

As shown in fig. 5, the binding clip 50 further includes a connecting pin 56, and the connecting pin 56 passes through the first through hole 542 of the first link 54, the first through hole 552 of the second link 55 and the connecting hole 34 of the driving wire 30, so as to pivotally connect the first end of the first link 54, the first end of the second link 55 and the second end of the driving wire 30.

As shown in fig. 4 and 5, the second through hole 544 of the first link 54 cooperates with the first shaft portion 528 of the first jaw 52 to effect a pivotal connection between the second end of the first link 54 and the first jaw 52; the second through hole 544 of the second link 55 mates with the second shaft portion 538 of the second jaw 53 to effect a pivotal connection between the second end of the second link 55 and the second jaw 53.

As shown in fig. 5, 11 and 12, the base 51 is substantially cylindrical. The base 51 defines a cutout 512 at a second end thereof, and the first jaw 52 and the second jaw 53 are receivable within the cutout 512. The base 51 at a second end forms a post 514 extending upwardly within the cutout 512, and the pivot hole of the first jaw 52 and the pivot hole of the second jaw 53 cooperate with the post 514 of the base 51, respectively, to effect pivotal connection of the first jaw 52 and the second jaw 53, respectively, to the base 51. In the closed state, the first jaw 52 and the second jaw 53 are received within the cutout 512, forming a substantially complete cylinder with the base 51.

As shown in fig. 5, 11 and 12, the base 51 further defines a slot 516 extending between the first and second ends thereof and through the base 51 in a direction transverse to the axis of the base 51, and the slot 516 communicates with the cutout 512 such that the first and

second links

54 and 55 can be received within the slot 516 and connected to the first and

second jaws

52 and 53, respectively.

As shown in fig. 5, 11 and 12, the base 51 has a connection 518 at a first end thereof, and the base 51 is fixedly connected with the flexible sleeve 40 by the connection 518.

As shown in fig. 5 and 6, the operating lever 10 forms a first outer convex ring 18 at the second end, the flexible sleeve 40 forms a first inner annular groove 41 at the first end, and the first outer convex ring 18 is rotatably fitted in the first inner annular groove 41; the base 51 forms a second outer collar 519 at the connecting portion 518, the flexible sleeve 40 forms a second inner annular groove 42 at the second end, and the second outer collar 519 rotatably fits within the second inner annular groove 42. Thereby, the operation lever 10 is rotatable with respect to the flexible sleeve 40, and the bit 50 is rotatable with respect to the flexible sleeve 40.

It will be appreciated that the slip ring 20 fits over the operating rod 10 and extends into the slide channel 14, and that rotation of the operating rod 10 relative to the flexible sleeve 40 causes rotation of the slip ring 20; the drive wire 30 is fixedly connected at a first end to the slip ring 20 such that the slip ring 20 carries the drive wire 30 relative to the flexible sleeve 40; the second end of the drive wire 30 is connected to the forcep head 50 such that the drive wire 30 rotates the forcep head 50 relative to the flexible sleeve 40. Thus, the orientation of the jaw 50 can be adjusted accordingly by rotating the lever 10 to better obtain the tissue to be sampled, making the operation of the biopsy forceps more flexible.

In some embodiments, the number of the first outer protruding rings 18 is plural, the number of the first inner annular grooves 41 is plural, and the plural first outer protruding rings 18 are rotatably fitted in the plural first inner annular grooves 41, respectively; the first outer retainer rings 519 are plural in number, the second inner ring grooves 42 are plural in number, and the plural second outer retainer rings 519 are rotatably fitted in the plural second inner ring grooves 42, respectively. Thereby, the lever 10 and the bit 50 can be rotated with respect to the flexible sleeve 40 and can be more stably fitted into the flexible sleeve 40.

As shown in fig. 5, 11 and 12, base 51 is further formed with a second channel 519 extending along the axis of base 51, second channel 519 being in communication with slot 516 and opening toward the first end of base 51 such that the second end of drive wire 30 passes through second channel 519 of base 51 and extends into slot 516 for pivotal connection with the first end of first link 54 and the first end of second link 55, respectively.

As shown in fig. 13 and 14, the second end of the first link 54 is further formed with a first boss 546 such that the second end of the first link 54 is supported between the first jaw 52 and the bottom surface of the slot 516, and the second end of the second link 55 is formed with a second boss 556 such that the second end of the second link 55 is supported between the second jaw 53 and the bottom surface of the slot 516, thereby maintaining a constant spacing between the first link 54 and the second link 55 and preventing the first link 54 and the second link 55 from interfering.

The following describes the use of endoscopic biopsy forceps 100 according to embodiments of the present disclosure, in accordance with the accompanying drawings.

As shown in FIG. 15, when sampling tissue on the inner wall of a body lumen such as the esophagus, the jaw 50 cannot be opened due to the compression of the tissue when the jaw 50 is inserted into the tissue.

As shown in fig. 16 and 17, an endoscopic biopsy forceps according to the present invention may be extended to surround the tissue of the inner wall of the body lumen, and the user operates the slide ring 20 to move the slide ring 20 in a direction away from the loop portion of the operating rod 10, thereby moving the second end of the drive wire 30 toward the second end of the jaw 50, and the first and

second jaws

52 and 53 are pivoted open about the second end of the jaw 50 by the first and

second links

54 and 55, thereby exposing a portion of the incision 512 of the base 51.

If desired, the lever 10 can be rotated to adjust the orientation of the forcep head 50 axially to facilitate obtaining the tissue to be sampled.

Next, it will be appreciated that the user may operate the endoscopic biopsy forceps to retract toward the tissue, a portion of which is readily accessible within the exposed incision 512 of the base 51 due to the compression of the tissue. The user then operates the slide ring 20 to move the slide ring 20 closer to the loop of the operating rod 10, which in turn moves the second end of the drive wire 30 away from the second end of the jaw 50, and via the first link 54 and the second link 55, causes the first jaw 52 and the second jaw 53 to pivot closed about the second end of the jaw 50, thereby grasping and containing tissue within the first cavity 524 and the second cavity 534.

An endoscopic biopsy forceps 200 according to another embodiment of the present disclosure is described below in conjunction with fig. 18 and 19.

As shown in fig. 18 and 19, an endoscopic biopsy forceps 200 according to another embodiment of the present disclosure differs from endoscopic biopsy forceps 100 only in that endoscopic biopsy forceps 200 further includes a guide wire 210 and a guide wire channel 220.

As shown in fig. 18, one end of the guide wire passage 220 extends to the operation rod, and the other end of the guide wire passage 220 extends to the forceps head. The guide wire 210 is slidably received in the guide wire channel 220, with one end of the guide wire 210 extending at the lever and the other end of the guide wire 210 extending at the jaw.

The following describes the use of endoscopic biopsy forceps 200 according to embodiments of the present disclosure, in accordance with the accompanying drawings of the specification.

The endoscopic biopsy forceps 200 according to embodiments of the present disclosure are used only in that the guide wire 210 is first fed into the body lumen during use, and the main body of the forceps 200 is then slid along the guide wire into the body lumen and guided to the tissue to be sampled. The subsequent procedure is similar to that of the endoscopic biopsy forceps 100 and will not be described in detail herein.

Further, in some embodiments, as shown in fig. 20-23, the first jaw 52 'and the second jaw 53' are each bowl-shaped and each define a first cavity 524 ', and the first cavity 524' may be bowl-shaped or cone-shaped. Thus, automatic tissue uptake into first cavity 524' is facilitated when bioptome 200 is withdrawn.

In other embodiments, as shown in fig. 24-27, the first jaw 52 "and the second jaw 53" are each tapered and each define a first cavity 524 ", and the first cavity 524' may be bowl-shaped or tapered. Thereby, opening of the biopsy forceps in tissue without a gap is facilitated.

In the embodiment shown in fig. 7 to 10 and 20 to 27, the

first jaws

52, 52 'and 52 "and the

second jaws

53, 53' and 53" have a symmetrical structure. However, in other embodiments, as shown in fig. 28 and 29, the first jaw 52 "'and the second jaw 53"' may have an asymmetric configuration, which may be suitable for biopsy of eccentric diseased tissue.

Other constructions and operations of endoscopic biopsy forceps according to embodiments of the present disclosure are known to those of ordinary skill in the art and will not be described in detail herein.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.

In the present disclosure, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art according to specific circumstances.

In the present disclosure, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above-described terms are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present disclosure.

Claims

1. An endoscopic biopsy forceps, comprising:

an operating rod having opposing first and second ends;

a slip ring slidably disposed to the operating rod;

a drive wire including opposing first and second ends, the first end of the drive wire fixedly connected to the slip ring;

a flexible sleeve having opposite first and second ends, the first end of the flexible sleeve being fixedly connected to the second end of the lever, the drive wire being received in the flexible sleeve; and

the clamp head comprises a base, a first clamp claw, a second clamp claw, a first connecting rod and a second connecting rod; the base includes opposing first and second ends, the first end of the base being connected to the second end of the flexible sleeve; the first jaw includes opposing first and second ends, the first end of the first jaw being closer to the first end of the base than the second end of the first jaw, the second end of the first jaw being pivotally connected to the second end of the base; the second jaw includes opposing first and second ends, the first end of the second jaw being closer to the first end of the base than the second end of the second jaw, the second end of the second jaw being pivotally connected to the second end of the base; the first link includes opposite first and second ends, the first end of the first link is pivotally connected to the second end of the drive wire, and the second end of the first link is pivotally connected between the first and second ends of the first jaw; the second link includes opposite first and second ends, the first end of the second link being pivotally connected to the second end of the drive wire, and the second end of the second link being pivotally connected between the first and second ends of the second jaw.

2. The endoscopic biopsy forceps of claim 1, wherein the first jaw has a first engagement surface and the second jaw has a second engagement surface, the first engagement surface being opposite the second engagement surface;

the binding clip has a closed state in which the first and second engagement surfaces abut and an open state; in the open state, the first engagement surface and the second engagement surface are angled therebetween.

3. The endoscopic biopsy forceps of claim 2, wherein the first engagement surface has a first serrated shape, the second engagement surface has a second serrated shape, and the first serrated shape is complementary to the second serrated shape.

4. The endoscopic biopsy forceps of claim 2 or 3, wherein the first jaw defines a first cavity recessed from the first engagement surface, the second jaw defines a second cavity recessed from the second engagement surface, the first and second cavities forming a receiving space in the closed state.

5. The endoscopic biopsy forceps according to any one of claims 1 to 3, wherein the first jaw is provided with a first handle at a second end thereof; the second jaw is provided with a second handle at a second end thereof, the first handle being pivotally connected to the second handle.

6. The endoscopic biopsy forceps of claim 5, wherein the first handle portion is formed with a first pivot hole passing transversely through the first jaw axis; the second handle portion is formed with a second pivot hole passing through the second jaw axis; and the first pivot hole and the second pivot hole are aligned.

7. The endoscopic biopsy forceps of any one of claims 1 to 3, wherein the first jaw has a downwardly extending first shaft portion formed in a mid-portion thereof for pivotal connection with the second end of the first link; the second jaw has a downwardly extending second shaft portion formed at a mid-portion thereof for pivotally connecting with the second end of the second link.

8. The endoscopic biopsy forceps of any one of claims 1 to 3, wherein the base forms an incision at a second end thereof, the first jaw and the second jaw being received within the incision.

9. The endoscopic biopsy forceps of claim 8, wherein the base further defines a slot extending through the base in a direction transverse to the base axis, and the slot communicates with the incision such that the first and second links are receivable within the slot.

10. The endoscopic biopsy forceps of claim 9, wherein the base further defines a second channel extending along the base axis, the second channel communicating with the slot and opening toward the first end of the base, such that the second end of the drive wire passes through the second channel of the base and extends into the slot to pivotally couple to the first end of the first link and the first end of the second link, respectively.