CN201436988U - disposable biopsy forceps - Google Patents

Abstract

The utility model relates to a surgical instrument for medical inspection, and discloses a disposable biopsy forceps, which mainly solves the problem that the existing biopsy forceps heads are difficult to bend through the narrow radius of the endoscope. Its structure is mainly composed of steel wire, pliers head assembly, metal hose and handle. A guide spring tube is fixedly installed on the section where the slender steel wire is connected with the core head, replacing the original rigid connector. One end of the guide spring tube extends out of the front fork and fits with the metal hose in a gap, so that it can be used as an endoscope. When the bending radius is small, the biopsy forceps can pass through the pincer channel, and the pin will never fall off. It has completely changed the defect that the pins of the existing surgical instruments get loose when the forceps head is opened, so that the disposable biopsy forceps can pass through the forceps path when the endoscope reaches a small bending radius, and the pins will never fall off.

Description

Disposable biopsy forceps

technical field

The utility model relates to a surgical instrument for medical examination, in particular to a disposable biopsy forceps.

Background technique

In recent years, endoscopy has been widely used as an auxiliary diagnostic method in clinical medical examination. When inspecting a lesion in a patient, the biopsy forceps can be inserted into the body through the forceps of the endoscope to clamp the lesion. Sampling through the endoscope is minimally invasive and painful, so endoscopy is a popular diagnostic method.

Existing biopsy forceps is made up of steel wire, forceps head assembly, metal hose and handle etc. The jaw assembly includes linkage and front fork. The connecting rod mechanism is composed of the left pliers head, right pliers head, left connecting rod, right connecting rod and corresponding connecting pins, in which the slender steel wire is mainly used to connect the connecting rod mechanism and the movable handle; the metal hose is mainly connected to the pliers head assembly and The handle assembly, so that the movable handle drives the slender steel wire, and the steel wire drives the link mechanism in the pliers head assembly. The movement of the link mechanism can make the two pliers heads in the pliers head assembly complete the opening and closing process, so that the lesion can be removed Tissue is removed from the body for examination.

The current biopsy forceps has a long rigid link between the forceps head assembly and the slender steel wire, which mainly plays the role of connection and guidance, so that the forceps head will not be skewed after opening, but also increases the length of the rigid section , when inspecting some lesions, it is necessary to bend the head of the endoscope to observe. At this time, the biopsy forceps must pass through the curved channel of the endoscope head. When the bending radius is small, it is difficult for the biopsy forceps with long rigid section Passed, which brought difficulties to the inspection.

In the current biopsy forceps jaw assembly, pin riveting is used between the two connecting rods and the two jaws. When the jaws are opened, the connection between the jaws and the connecting rods will exceed the height of the guide groove on the front fork. At this time, the pins Comes loose easily.

Utility model content

The utility model provides a disposable biopsy forceps, which is used to solve the problem that the current biopsy forceps pincers are difficult to bend through the small radius of the endoscope, and the pins in the current biopsy forceps pincers assembly are easy to loosen. question.

A disposable biopsy forceps of the present utility model comprises: a steel wire, a forceps head assembly and a metal hose. In the metal hose, a section connecting the steel wire and the core head is fixedly installed with one end of a guide spring tube. The other end of the spring tube stretches out from the front fork in the pliers head assembly and cooperates with the metal hose in clearance.

Wherein, the guide spring tube is a non-rigid connector.

Wherein, the pliers head assembly includes: a left pliers head and a right pliers head installed on a long pin, and the left and right pliers heads can rotate around the long pin; The two-section plates are connected, and the other ends of the two-section plates are connected with the core head through short pins, and the two-section plates can rotate around the short pins.

Another disposable biopsy forceps of the present utility model comprises: a steel wire, a clamp head assembly and a metal hose, and the clamp head assembly includes: a left clamp head and a right clamp head installed on a long pin, the left and right clamp heads The pliers heads can rotate around the long pins; the ends of the left and right pliers heads without cutting edges are respectively connected to the two-section plates, and the other ends of the two-section plates are connected to the core head in the metal hose through short pins, and the The above-mentioned two-section plate can rotate around the short pin.

The beneficial effects of the utility model are as follows: the utility model has improved structural design. The guide spring tube is introduced to replace the rigid connector of the biopsy forceps in the prior art. Since the guide spring tube is a non-rigid connector, it not only ensures the use function of the current biopsy forceps, but also can pass through the small bend in the head of the endoscope. The radius of the channel solves the problem that the current biopsy forceps has difficulties in bending the channel with a smaller radius through the endoscope.

The joint plate designed by the utility model replaces the connecting rod of the current biopsy forceps, because the joint plate in the utility model is designed as a whole with the original connecting rod and the pin. The clamp head is directly connected to the joint plate, so the phenomenon of pin loosening is eliminated.

Description of drawings

Fig. 1 is the outline drawing of the utility model;

Fig. 2 is the structural schematic diagram of the head assembly of the biopsy forceps of the present utility model;

Fig. 3 is a schematic diagram of the linkage mechanism in the pliers head assembly of the present invention.

Detailed ways

The utility model provides disposable biopsy forceps, as shown in FIG. 1 , and its appearance includes: a metal hose 5 , a handle 12 and a pull ring 13 connected in sequence.

Embodiment 1, as shown in Figure 2 and Figure 3, when the endoscope reaches a smaller bending radius, the biopsy forceps that can pass through the pincer channel, that is, the disposable biopsy forceps of this embodiment includes a front fork 1, a left forceps head 11 , right pincer head 10, left joint plate 8, right joint plate 9, core head 4, metal flexible pipe 5 (i.e. flexible pipe 5 in Fig. 2), guide spring tube 6 and steel wire 7. Install the left pincer head 11 and the right pincer head 10 on the long pin 2 (that is, the long pin 2 in FIG. 2 ), and ensure that the two pincer heads can rotate around the long pin 2 . One end of the two pliers without cutting edges is connected to the two joint plates respectively, and the other end of the two joint plates is connected with the core head 4 by a short pin 3 (ie, the short pin 3 in Fig. 2 ), and can rotate around the short pin 3. The other end of the core 4 is welded to the steel wire 7, and when the pliers are closed, a section of the core 4 connected to the steel wire 7 cannot exceed the mounting hole on the front fork 1. In the metal hose 5, a section of the steel wire 7 connected to the core head 4 is fixedly installed with a guide spring tube 6, and the other end of the guide spring tube 6 extends out of the front fork 1 and fits with the metal hose 5 in a clearance, so that the guide spring tube 6 can be guaranteed Bending simultaneously with the metal hose 5, so that the pincer head assembly passes through the pincer path with a smaller bending radius.

In this embodiment, the guide spring tube is introduced to replace the rigid connector of the biopsy forceps in the prior art. Since the guide spring tube is a non-rigid connector, it not only ensures the use function of the current biopsy forceps, but also can pass through the endoscopic The channel with a small bending radius in the lens head solves the problem that the existing biopsy forceps heads are difficult to bend the channel with a small radius through the endoscope. Moreover, the connecting rod and the pin of the existing biopsy forceps are replaced with the nodal plate. In the current biopsy forceps jaw assembly, the two jaws are connected to the two connecting rods by pins. When the jaws are opened, the connection between the jaws and the connecting rods will exceed the height of the guide groove on the front fork. The pins to the linkage are easy to loosen. The nodal plate of this embodiment replaces the connecting rod of the current biopsy forceps, and the nodal plate is designed as an integral body with the existing connecting rod and the pin. The pliers head is directly connected to the joint plate, which prevents the pin from loosening. Materials in this embodiment are all made of stainless steel except the handle assembly to prevent rust.

Embodiment 2, referring to shown in Fig. 2, the disposable biopsy forceps of the present embodiment comprises front fork 1, core head 4, metal hose 5 (i.e. hose 5 in Fig. 2), guide spring tube 6, steel wire 7, and A connecting rod and a pin in an existing biopsy forceps jaw assembly structure. One end of the core 4 is welded to the steel wire 7, and when the pliers are closed, a section of the core 4 connected to the steel wire 7 cannot exceed the mounting hole on the front fork 1. In the metal hose 5, a section of the steel wire 7 connected to the core head 4 is fixedly installed with a guide spring tube 6, and the other end of the guide spring tube 6 extends out of the front fork 1 and fits with the metal hose 5 in a clearance, so that the guide spring tube 6 can be guaranteed Bending simultaneously with the metal hose 5, so that the pincer head assembly passes through the pincer path with a smaller bending radius.

Although this embodiment can not prevent the loosening of the pins, the guide spring tube is introduced to replace the rigid connector of the biopsy forceps in the prior art. Since the guide spring tube is a non-rigid connector, it not only ensures the use function of the current biopsy forceps , and can pass through the pliers with a smaller bending radius in the head of the endoscope, which solves the problem that the current biopsy forceps heads have difficulties in bending the pliers with a smaller radius through the endoscope. Materials in this embodiment are all made of stainless steel except the handle assembly to prevent rust.

Embodiment 3, referring to FIG. 3 , the disposable biopsy forceps of this embodiment includes: a left forceps head 11 , a right forceps head 10 , a left segmental plate 8 , and a right segmental plate 9 . Install the left pliers head 11 and the right pliers head 10 on the pin, and ensure that the two pliers heads can rotate around the pin. The ends without cutting edges of the two pliers are respectively connected with the two-section plates, and the other ends of the two-section plates are connected with the core head through another pin, and both of them can rotate around the pin. In this embodiment, the rigid connector of the biopsy forceps in the prior art is used to connect the biopsy forceps to the forceps head assembly and the elongated steel wire.

Although this embodiment can not solve the problem that the current biopsy forceps pincers have difficulties when they pass through the narrower channel of the endoscope, there are other problems in the current biopsy forceps, that is, in the biopsy forceps pincers assembly, the two pincers It is connected with the two connecting rods by pins. When the clamp head is opened, the connection between the clamp head and the connecting rod will exceed the height of the guide groove on the front fork. At this time, the pin connecting the clamp head and the connecting rod is easy to loosen. The nodal plate in this embodiment replaces the connecting rod of the current biopsy forceps, and the nodal plate is designed as a whole with the existing connecting rod and the pin. The pliers head is directly connected to the joint plate, which prevents the pin from loosening. Materials in this embodiment are all made of stainless steel except the handle assembly to prevent rust.

Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and equivalent technologies thereof, the utility model is also intended to include these modifications and variations.

Claims (4)

1. a disposable biopsy forceps, comprising: steel wire (7), pincer head assembly and metal hose (5), it is characterized in that, in described metal hose (5), steel wire (7) and core head ( 4) The connected section is fixedly installed with one end of the guide spring tube (6), and the other end of the guide spring tube (6) protrudes from the front fork (1) in the pliers head assembly and connects with the metal hose (5) Clearance fit. 2. The disposable biopsy forceps according to claim 1, characterized in that, the guide spring tube (6) is a non-rigid connector. 3. A kind of disposable biopsy forceps as claimed in claim 1, is characterized in that, described pliers head assembly comprises: the left pliers head (11) that is installed on the long pin (2) and the right pliers head (10), The left and right pliers heads can rotate around the long pin (2); the ends of the left and right pliers heads without cutting edges are connected to the two-section plates respectively, and the other ends of the two-section plates pass through the core head (4) The short pins (3) are connected, and the two plates can rotate around the short pins (3). 4. A disposable biopsy forceps, comprising: steel wire (7), pincer head assembly and metal hose (5), it is characterized in that, described pincer head assembly includes: the left pincer head that is installed on the long pin (2) (11) and right pliers (10), the left and right pliers can rotate around the long pin (2); the ends of the left and right pliers without cutting edges are connected to the two section plates respectively, and the two sections The other end of the plate is connected with the core head (4) in the metal hose (5) through a short pin (3), and the two-section plate can rotate around the short pin (3).

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