CN205144668U - Water injection type shaping tool - Google Patents

Abstract

The utility model discloses a water-injection type planing tool, which comprises a knife handle, an outer knife tube and an inner knife tube coaxially rotated and fitted inside the outer knife tube, and an inner knife tube is formed between the outer knife tube and the inner knife tube. The water injection channel, the knife handle is provided with a flow channel communicating with the water injection channel in the knife; the water injection channel in the knife arranged in the knife and the water injection channel in the handle are radially sealed and matched to prevent physiological saline from being input from the side wall of the knife or independently Injection, so that the planing component has the function of electrocoagulation and planing, avoiding long waiting time for surgery, ensuring immediate hemostasis of the wound, and ensuring that the doctor has a better operating vision, compact structure, and reducing the difficulty of surgery.

Description

Water injection type planing tool

technical field

The utility model relates to a medical device, in particular to a medical water-injection planing cutter for minimally invasive tissue cutting.

Background technique

In otolaryngology lesion tissue resection surgery, due to the small operating space, the planer assembly consisting of a planer tool and a planer power handle is generally used to control the removal of diseased tissue, which can effectively ensure high cutting efficiency during the operation; However, in the actual operation, the planing tool is likely to cause wound bleeding when planing. In the prior art, a single electric coagulation forceps is generally used for hemostasis, but in the process of replacing the electric coagulation forceps, the waiting time for the operation is increased, and it may Delaying the best hemostasis time increases the risk of surgery; and in order to avoid replacement time, a planing assembly with electrocoagulation and planing functions has appeared, and during electrocoagulation, due to the heating of the working electrode at the front end of the tool, it is easy to scab , affecting further electrocoagulation. At the same time, sometimes when the bone tissue is planed, some slag will adhere to the wound. Therefore, the wound and the front end of the tool need to be rinsed. Generally, an external water injection pipe is used for flushing, but due to the water injection pipe The introduction will cause the doctor's vision and operation to be affected, which is not conducive to the operation.

Utility model content

In view of this, the purpose of this utility model is to overcome the defects in the prior art, to provide an electrocoagulation water injection type planing tool, to provide a water injection type planing tool, which can make the planing tool have the functions of water injection and planing, Avoid the impact of the water injection tool on the operation during the planing operation, and at the same time ensure that the doctor has a better operating vision and reduce the difficulty of the operation.

The water injection type planing cutter of the utility model comprises a handle, an outer cutter tube and an inner cutter tube which is sleeved on the outer cutter tube and rotates coaxially with the outer cutter tube. The water injection channel in the knife, the knife handle is provided with a flow channel communicating with the water injection channel in the knife; the knife handle is installed behind the interface of the handle, and the flow channel communicates with the water injection channel in the handle of the handle.

Further, the flow channel is arranged radially along the handle of the knife, and an outer annular water passage is provided on the outer circumference of the handle, and the water inlet of the flow channel is located in the outer annular water passage.

Further, sealing rings are provided on the front and rear sides of the outer annular water passage.

Further, the tail end of the inner knife tube passes through the outer knife tube and forms an axial seal with the knife handle, and the flow channel is located in front of the seal and communicates with the water injection channel in the knife.

Further, the tail end of the knife handle is provided with an end cap assembly for axially sealing between the tail end of the inner knife tube and the knife handle, and the end cap assembly is fixedly connected to the knife handle in a detachable manner.

Further, the end cap assembly includes an annular end cap and a lip sealing ring arranged between the annular cover plate and the handle, and the lip sealing ring is sealed and fixed between the knife handle and the annular cover plate.

Further, it also includes a cutter electrocoagulation circuit, the front side of the water inlet of the flow channel is provided with an input electrode of the cutter coagulation circuit, the water injection type planer is installed behind the power handle, and the inlet of the flow channel A seal is formed between the water port and the input electrode.

Further, the internal channel of the inner knife tube forms a suction channel in the knife, and the water-injection planing tool is installed behind the handle, and the suction channel in the knife communicates with the suction channel in the handle in the handle.

Further, the rear end of the inner knife tube is fixedly provided with a drive sleeve that is overlaid on the inner knife tube, and the tail end of the drive sleeve is provided with a drive interface for rotating the drive sleeve.

Further, an accommodating space for placing an electronic tag is provided inside the side wall of the driving sleeve, and the accommodating space is sealed by a sealing cover.

The beneficial effects of the utility model are: the water injection type planing tool of the utility model is sealed and matched by the water injection channel in the knife and the water injection channel in the handle in the handle, so as to avoid the input of physiological saline from the side wall of the tool or the external device. Independent injection, avoiding inconvenient operation, ensuring a wide surgical field of view, reducing the difficulty of surgery, the handle structure is small, easy to operate, improving the efficiency of surgery, and washing the wound debris and scab at the front of the knife to ensure the electrocoagulation of the working electrode at the front of the knife Clean and get the patient back quickly.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Fig. 1 is the outer cutter tube structure schematic diagram of the utility model water injection type planing cutter;

Figure 2 is an enlarged view of A in Figure 1;

Fig. 3 is a schematic diagram of the assembly structure of the inner and outer cutter tubes of the water injection type planing cutter of the present invention;

Fig. 4 is a structural diagram of the assembly of the water-injection planing cutter and the handle of the utility model.

detailed description

Fig. 1 is a schematic diagram of the structure of the outer cutter tube of the water injection type planing tool of the present invention, Fig. 2 is an enlarged view of A in Fig. 1, and Fig. 3 is a schematic diagram of the assembly structure of the inner and outer cutter tubes of the water injection type planing tool of the present invention, Fig. 4 is a structural diagram of the assembly of the water-injection planing cutter and the handle of the utility model. As shown in the figure, the water injection type planing cutter 2 in this embodiment includes a handle 20, an outer cutter tube 21 and an inner cutter tube 22 coaxially rotating and fitted inside the outer cutter tube 21. The outer cutter tube 21 A water injection channel 31 in the knife is formed between the inner knife tube 22, and the handle 20 is provided with a flow channel 30 communicating with the water injection channel 31 in the knife. After the handle 20 is installed on the interface of the handle, the flow channel 30 communicates with the water injection channel in the handle of the handle; by setting the flow channel 30 in the handle 20 and communicating with the water injection channel 31 in the knife, after the knife 2 is installed on the handle, the flow channel 30 can be communicated with the water injection channel in the handle , to achieve water injection in the planing component, to avoid the impact of external water injection on the surgical operation and vision, to reduce the difficulty of surgery, and to facilitate the washing of the wound and the working electrode of the front end of the knife 2 electrocoagulation.

In this embodiment, the flow channel 30 is arranged radially along the handle 20, and the outer circle of the handle 20 is provided with an outer annular water passage 29, and the water inlet 28 of the flow channel 30 is located in the outer annular water passage 29; With the setting of the outer annular water tank 29, the water inlet 28 of the flow channel 30 does not need to be aligned with the water injection channel in the handle of the handle along the circumferential direction to realize water injection, which is easy to operate and ensures smooth water flow.

In this embodiment, the front and rear sides of the outer annular water passage 29 are provided with sealing rings, and the sealing rings include a sealing ring 8a arranged on the front side of the outer annular water passage 29 in the axial direction and a sealing ring 8a arranged on the rear side of the outer annular water passage 29 Sealing ring 8b; the setting of the sealing ring can effectively prevent water leakage in the outer annular water tank 29, and the structure is simple and easy to install.

In this embodiment, the tail end of the inner knife tube 22 passes through the outer knife tube 21 and forms an axial seal with the handle 20, and the flow channel 30 is located in front of the seal and communicates with the water injection channel 31 in the knife; 20 forms an axial seal for the inner cutter tube 22, and the sealing structure is achieved by setting the above-mentioned sealing ring between the outer wall of the inner cutter tube 22 and the handle 20 to achieve axial sealing, so as to ensure that the inner cutter tube 22 can also be injected with water when planing and rotating , Improve work efficiency.

In this embodiment, the end of the knife handle is provided with an end cover assembly for axial sealing between the end of the inner knife tube 22 and the knife handle 20, and the end cover assembly is fixedly connected to the knife handle in a detachable manner. The handle includes a front section 20a, a middle section 20b and a tail section 20c, the end of the tail section is provided with an end cap assembly for sealing, the end cap assembly includes an annular cover plate 32 and a lip seal ring 33, the annular The outer circle of the cover plate 32 is clamped on the end of the tail section 20c of the knife handle and axially presses the outer circle of the lip-shaped sealing ring 33 forward, and the inner circle of the lip-shaped sealing ring 33 is sleeved on the outer wall of the inner knife tube 22 to realize For axial sealing, the lip seal ring 33 is located on the front side of the annular cover plate 32; the front side here means the front side of the tool, and the structure of the end cover assembly is used for sealing, which makes assembly easy, good sealing effect, and easy maintenance.

In this embodiment, the water-injection planing tool may also include a tool electrocoagulation circuit, and the front side of the water inlet 28 of the flow channel 30 is provided with an input electrode of the tool coagulation circuit, and the water-injection planing tool is installed Behind the power handle, a seal is formed between the water inlet 28 of the flow channel 30 and the input electrode; on the side of the front handle near the tool head, as shown in the figure, the water inlet 28 of the flow channel 30 The gap between the input electrode and the input electrode is sealed by setting a sealing ring 8a to ensure that the tool electrocoagulation circuit of the tool is not short-circuited. The structure is simple, the sealing effect is good, and the assembly and disassembly are convenient.

In this embodiment, the internal channel of the inner knife tube 22 forms a suction channel 22a in the knife. After the water injection type planing tool is installed in the handle, the suction channel 22a in the knife and the suction channel in the handle in the handle The passage is connected; the front end opening of the inner knife tube 22 is the suction inlet in the knife, and the rear end opening is the suction outlet in the knife. By setting the inner chamber of the inner knife tube 22 as the suction channel 22a in the knife, the suction The flow rate is large and the radial dimension of the cutter will not increase, ensuring that the cutter is suitable for minimally invasive surgery.

In this embodiment, the rear end of the inner knife tube 22 is fixedly provided with a driving sleeve 40 that is overlaid on the inner knife tube 22, and the tail end of the driving sleeve 40 is provided with a driving interface for rotating the driving sleeve 40; The sleeve 40 is coupled to the output end of the handle power assembly through a shift fork 40a. The drive sleeve 40 engages with the end face of the shift fork, and the drive sleeve 40 coaxially drives the inner knife tube 22 to rotate. The drive is stable and the transmission efficiency is high.

In this embodiment, the inside of the side wall of the drive sleeve 40 is provided with an accommodating space 42 for placing the electronic tag 41, and the accommodating space 42 is sealed by a sealing cover 43; by placing the electronic tag inside the side wall of the drive sleeve 40 41. After the electronic tag 41 is inserted into the handle, the corresponding tool data is read by the identification coil in the handle and the data is sent to the host to select output parameters; by setting the electronic tag 41 in the drive sleeve 40 and sealing it through the sealing cover, the The output parameters of the handle match the tool to ensure the normal use of the tool.

In another embodiment, the tool electrocoagulation circuit provided on the tool includes a working electrode located at the front end of the tool and an input electrode located at the handle 20, and an electrical connection between the input electrode and the working electrode Connection; the working electrode is arranged on the front end of the cutting tool 2, and the working electrode and the input electrode can be electrically connected through a conductive layer (such as an enameled wire) or an insulating attachment, and the cutting tool electrocoagulation circuit includes a conductive line or a conductive layer; when the cutting tool is installed on After the interface of the handle, the input electrode is connected with the handle electrocoagulation circuit of the handle, and the handle electrocoagulation circuit at least includes an output electrode set in the handle interface to cooperate with the input electrode, so as to realize the conduction of the working electrode at the front end of the tool and realize the electrocoagulation . By setting the input electrode on the knife handle 20 at the tail of the knife 2, the knife electrocoagulation circuit is located inside the knife 2, and after the knife 2 is installed on the handle, the input electrode on the knife 2 is electrically connected to the output electrode in the handle interface, In order to achieve electrocoagulation, the tool 2 does not need to be connected to an external electrocoagulation power supply wire, so as to avoid the interference of the visual field. When the patient needs to stop bleeding in time, the electrocoagulation planing handle can be used to control the tool to directly electrocoagulate the wound to stop bleeding, avoiding the need to replace the hemostatic device The waiting time is too long to ensure the safety of the patient, and it is convenient to assemble and disassemble, and the operation is simple.

In this embodiment, a conductive layer 23 is provided along the axial direction of the tool, and the front end of the conductive layer 23 and the front end of the outer knife tube 21 constitute the two poles of the working electrode respectively; the film structure of the conductive layer 23 ensures the radial dimension change of the tool Not large, the cutting tool is suitable for narrow spaces, and the conductive layer 23 is not easy to break, avoiding frequent maintenance of the cutting tool 20, so that the cutting tool has a longer service life.

In this embodiment, the conductive layer 23 is insulated and attached to the outer wall of the outer knife tube 21; by setting the inner insulating layer 26 and the outer insulating layer 27 on the inner and outer surfaces of the conductive layer 23 respectively, the conductive layer 23 and the outer knife tube 21 A loop is formed between them, and the insulating layer can avoid leakage and short circuit, ensuring the safety of the tool during electrocoagulation.

In this embodiment, the input electrodes include a first electrode ring 24a and a second electrode ring 25a that are arranged on the handle 20 and electrically connected to the power supply through the handle electrocoagulation circuit. The first electrode ring 24a and the second electrode ring The two electrode rings 25a are electrically connected to the conductive layer 23 and the outer knife tube 21 respectively; After the outer surface of the tail end of the tube 21 is directly exposed, it is in contact with the inner side wall of the second electrode ring 25a. The first electrode ring 24a includes a first seat tube 24b that is covered with a conductive layer 23 and is formed by the first seat tube 24b. The outer wall extends radially outward and is bent to form a first wing-shaped ring 24c, the first wing-shaped ring 24c has a stepped radial section; the second electrode ring 25a includes a first A seat tube 25b and the outer wall of the first seat tube 25b extend radially outward to form a circular second wing ring 25c. The handle 20 includes a front section 20a, a middle section 20b and a tail section 20c. The front section 20a 1. The middle section 20b and the tail section 20c fix the first electrode ring 24a and the second electrode ring 25a by cooperating with each other (the first electrode ring 24a is fixed by the cooperation of the front section 20a and the middle section 20b, and the second electrode is fixed by the cooperation of the middle section 20b and the tail section 20c ring 25a), utilize the setting of the first seat tube 24b and the first seat tube 25b to ensure the stability and fixation of the positive electrode ring, and the contact resistance is small to ensure low heating power; the first wing ring 24c and the second wing ring The outer walls of 25c are conductive contact points respectively; the first wing ring 24c and the second wing ring 25c are fixed with the handle, the structure stability of the electrode ring is strong, and it is in stable contact with the output electrode in the handle, while ensuring a compact structure and easy installation. Easy to disassemble.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the utility model can be Any modification or equivalent replacement of the technical solution without departing from the purpose and scope of the technical solution of the utility model shall be included in the claims of the utility model.

Claims (10)

1. A water-injection type planing tool, which cooperates with the handle, includes a handle, an outer knife tube and an inner knife tube that is sleeved on the outer knife tube and rotates coaxially with the outer knife tube, and is characterized in that: the outer knife The water injection channel in the knife is formed between the tube and the inner knife tube, and a flow channel communicating with the water injection channel in the knife is provided on the handle of the knife; after the handle is installed on the interface of the handle, the flow channel and the handle of the handle The water injection channel is connected. 2. The water-injection planing tool according to claim 1, characterized in that: the flow channel is arranged radially along the handle of the knife, and the outer circle of the handle is provided with an outer annular water tank, and the water inlet of the flow channel is located at the The outer ring passes through the water tank. 3. The water-injection planing tool according to claim 2, characterized in that: the front and rear sides of the outer annular water passing groove are provided with sealing rings. 4. The water-injection planing tool according to claim 2 or 3, characterized in that: the tail end of the inner cutter tube passes through the outer cutter tube and forms an axial seal with the handle, and the flow channel is located at the seal Front and communicated with the water injection channel in the knife. 5. The water injection type planing tool according to claim 4, characterized in that: the tail end of the handle is provided with an end cap assembly for axially sealing between the tail end of the inner knife tube and the handle, and the end The cover assembly is fixedly connected with the knife handle in a detachable manner. 6. water injection type planing tool according to claim 5, is characterized in that: described end cap assembly comprises annular end cap and is arranged on the lip seal ring between annular cover plate and handle of a knife, and described lip seal The sealing ring is fixed between the knife handle and the annular cover plate. 7. The water injection type planing cutter according to claim 1, characterized in that: it also includes a cutter electrocoagulation circuit, the front side of the water inlet of the flow channel is provided with an input electrode of the cutter electrocoagulation circuit, the After the water injection planing tool is installed on the power handle, a seal is formed between the water inlet of the flow channel and the input electrode. 8. The water injection type planing tool according to any one of claims 1 to 3, characterized in that: the internal channel of the inner knife tube forms a suction channel in the knife, and the water injection type planing tool is installed behind the handle , the suction channel in the knife communicates with the suction channel in the handle in the handle. 9. The water injection type planing tool according to any one of claims 1 to 3, characterized in that: the rear end of the inner cutter tube is fixedly provided with a drive sleeve that is overcoated on the inner cutter tube, and the tail end of the drive sleeve A driving interface for rotating the driving sleeve is provided. 10. The water-injection type planing tool according to claim 9, characterized in that: the inside of the side wall of the drive sleeve is provided with an accommodating space for placing an electronic tag, and the accommodating space is sealed by a sealing cover.