Skin expanding knife

Abstract

The utility model discloses a skin expanding knife which comprises a handle (1) and a blade (2), one end of the handle (1) is provided with a blade installation frame (3), the blade (2) is installed on the handle (1) through the blade installation frame (3), a medicine flow channel (4) and a blood flow channel (5) are formed in the blade (2), a medicine containing groove (6) is formed in the handle (1), a medicine bag (7) is installed in the medicine containing groove (6), and the medicine bag (7) is connected with the blade (2). The medicine bag (7) is provided with a medicine outlet pipe (8), the tail end of the blade (2) is provided with a connecting pipe (9), the connecting pipe (9) is communicated with the medicine flow channel (4), and the connecting pipe (9) is connected with the medicine outlet pipe (8) through a connecting piece. The local anesthesia device can achieve local anesthesia, blood vessel bleeding can be found in time, and further damage to blood vessels is avoided.

Description

Technical Field

[0001] This utility model relates to a skin expander, belonging to the field of medical device technology. Background Technology

[0002] In clinical practice, many puncture techniques rely heavily on the use of a skin expander. Expanding the skin before inserting the catheter / catheter sheath can improve the success rate of catheter placement and reduce patient trauma and pain. However, currently used skin expanders still have the following problems:

[0003] First, before skin resizing, 1% lidocaine needs to be drawn with a syringe and delivered subcutaneously using the syringe before the skin can be resized with a rescalpel, which is a rather cumbersome procedure.

[0004] Secondly, there is a risk of damaging blood vessels when using a dermal retractor. If the damage to blood vessels is not detected in time, it can easily lead to serious damage to the blood vessels. Utility Model Content

[0005] The purpose of this invention is to provide a skin retractor to solve the technical problems in the prior art. It can achieve local anesthesia and can detect bleeding in blood vessels in time, avoiding further damage to blood vessels.

[0006] This utility model provides a skin expander, including a handle and a blade. One end of the handle has a blade mounting bracket, and the blade is mounted on the handle via the blade mounting bracket. A drug flow channel and a blood flow channel are formed inside the blade. The handle is provided with a drug receiving groove, and a drug sac is installed in the drug receiving groove. The drug sac has a drug dispensing tube. The tail end of the blade has a connecting tube, which communicates with the drug flow channel and is connected to the drug dispensing tube via a connector.

[0007] In the aforementioned skin expander, preferably, the blade mounting bracket has a blade retaining groove, and the blade has a blade mounting groove.

[0008] In the aforementioned skin expander, preferably, both the drug channel and the blood channel are close to the back of the blade, one end of the drug channel and the blood channel are located at the tip of the blade, and the other end of the drug channel is connected to the connecting tube.

[0009] In the aforementioned skin expander, preferably, an observation groove is provided on one side of the blade, the observation groove is connected to the blood flow channel, the length of the observation groove is less than the length of the blade, and a transparent cover is fixed on the observation groove.

[0010] In the aforementioned skin expander, preferably, the connecting component includes a rubber slider, a paddle, and a connecting rod. The end of the handle with the blade mounting bracket has a connecting tube mounting groove. The rubber slider is slidably mounted in the connecting tube mounting groove. A guide groove is formed on the top surface of the handle. The paddle is located at the top of the handle. The paddle is connected to the rubber slider through the connecting rod. The connecting rod is located in the guide groove. A through hole is provided on the rubber slider.

[0011] In the aforementioned dermal expander, preferably, the drug receiving groove is connected to the connecting tube mounting groove.

[0012] In the aforementioned skin expander, preferably, a pressing plate is rotatably mounted on one side of the handle via a pivot, and a pressing block is fixed at the end of the pressing plate away from the pivot, the pressing block being plugged into the drug receiving groove.

[0013] Compared with the prior art, the present invention includes a handle and a blade. One end of the handle has a blade mounting bracket, and the blade is mounted on the handle through the blade mounting bracket. A drug flow channel and a blood flow channel are formed inside the blade. The handle is provided with a drug receiving groove, and a drug capsule is installed in the drug receiving groove. The drug capsule has a drug dispensing tube. The tail end of the blade has a connecting tube, which communicates with the drug flow channel and is connected to the drug dispensing tube through a connector. This invention features a drug flow channel and a blood flow channel on the blade, and a drug receiving groove on the handle. A drug capsule containing 1% lidocaine is installed in the drug receiving groove. During use, the dispensing tube of the capsule is cut off and connected to a connecting tube via a connector. When the blade tip enters the subcutaneous tissue, the capsule is squeezed, and the 1% lidocaine flows along the drug flow channel to the blade tip, injecting into the subcutaneous tissue for local anesthesia. This replaces the syringe injection of existing technologies, simplifying the surgical procedure and reducing patient discomfort. If a blood vessel is accidentally punctured during skin dilation, blood will quickly enter the blood flow channel, allowing the doctor to immediately see the blood and take immediate measures to prevent further damage to the blood vessel. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the blade's structure;

[0016] Figure 3 This is a half-sectional view of the blade;

[0017] Figure 4 This is an exploded view of the handle;

[0018] Figure 5 This is a structural diagram of the connector.

[0019] Explanation of reference numerals in the attached drawings: 1. Handle; 2. Blade; 3. Blade mounting bracket; 4. Drug flow channel; 5. Blood flow channel; 6. Drug container; 7. Drug sac; 8. Dispensing tube; 9. Connecting tube; 10. Blade locking groove; 11. Blade mounting groove; 12. Observation groove; 13. Transparent cover; 14. Connecting tube mounting groove; 15. Rubber slider; 16. Guide groove; 17. Paddle; 18. Connecting rod; 19. Through hole; 20. Rotating shaft; 21. Pressing plate; 22. Pressing block. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] Embodiments of this utility model: such as Figures 1-5 As shown, a skin expander includes a handle 1 and a blade 2. One end of the handle 1 has a blade mounting bracket 3. The blade 2 is mounted on the handle 1 through the blade mounting bracket 3. A drug flow channel 4 and a blood flow channel 5 are formed inside the blade 2. The handle 1 is provided with a drug receiving groove 6. A drug sac 7 is installed in the drug receiving groove 6. The drug sac 7 has a drug dispensing tube 8. The tail end of the blade 2 has a connecting tube 9. The connecting tube 9 communicates with the drug flow channel 4 and is connected to the drug dispensing tube 8 through a connector.

[0022] The drug capsule 7 contains 1% lidocaine, which is used to achieve local anesthesia. When in use, the drug capsule 7 is squeezed, and the 1% lidocaine in the drug capsule 7 reaches the tip of the blade 2 through the drug outlet tube 8, connector, connecting tube 9, and drug flow channel 4. When the blade tip enters the subcutaneous tissue, the 1% lidocaine is injected into the subcutaneous tissue to achieve local anesthesia.

[0023] If blade 2 accidentally cuts the blood vessel wall, blood will flow along blood flow channel 5 under pressure. Doctors can observe the blood in time and take immediate measures to prevent further damage to the blood vessel.

[0024] In one specific embodiment, the blade 2 and the blade mounting bracket 3 are installed using a conventional structure in the prior art, such as a blade engaging groove 10 formed on the blade mounting bracket 3 and a blade mounting groove 11 on the blade 2.

[0025] The blade mounting slot 11 is a through slot, wider at one end near the handle 1 and narrower at the other end. During installation, the blade mounting bracket 3 is inserted into the blade mounting slot 11 from the wider end, and then the narrower end is inserted into the blade retaining slot 10. Then, the blade 2 is pulled back until the blade mounting bracket 3 is fully inserted into the blade mounting slot 11. The disassembly process is the reverse of the installation process.

[0026] Furthermore, both the drug flow channel 4 and the blood flow channel 5 are close to the back of the blade 2, with one end of the drug flow channel 4 and the blood flow channel 5 located at the tip of the blade 2, and the other end of the drug flow channel 4 connected to the connecting tube 9.

[0027] In this embodiment, the drug channel 4 is located above the blood channel 5, and both are parallel to the back of the blade 2. Because when using the dermabrasion knife, the tip of the blade contacts the skin first, so one end of the drug channel 4 and the blood channel 5 are both located at the tip of the blade. This allows 1% lidocaine to be injected subcutaneously quickly, and if there is bleeding, it can quickly enter the blood channel 5.

[0028] To facilitate observation of bleeding, an observation groove 12 is provided on one side of the blade 2 in this embodiment. The observation groove 12 is connected to the blood flow channel 5. The length of the observation groove 12 is less than the length of the blade 2. A transparent cover plate 13 is fixed on the observation groove 12.

[0029] In this embodiment, the observation groove 12 is located on the left side of the blade 2. Since doctors usually hold the blade with their right hand, the left side of the blade 2 faces the doctor's eyes. Setting the observation groove 12 on the left side makes it easier to see. Of course, for doctors who hold the blade with their left hand, it is recommended to use a blade with the observation groove 12 located on the right side.

[0030] The transparent cover 13 is made of plastic. The blade 2 is a disposable item that must be discarded after use and cannot be reused. Therefore, the transparent cover 13 is made of a lower-cost material. The other end of the blood flow channel 5 is located on the side wall of the blade 2 opposite to the cutting edge. That is, the blood flow channel 5 is a passage that runs through the blade 2.

[0031] Furthermore, the connector includes a rubber slider 15, a paddle 17, and a connecting rod 18. A connecting tube mounting groove 14 is formed at one end of the handle 1 where the blade mounting bracket 3 is located. The rubber slider 15 is slidably mounted within the connecting tube mounting groove 14. A guide groove 16 is formed on the top surface of the handle 1. The paddle 17 is located at the top of the handle 1 and is connected to the rubber slider 15 via the connecting rod 18, which is located within the guide groove 16. A through hole 19 is provided on the rubber slider 15. The drug receiving groove 6 communicates with the connecting tube mounting groove 14. The ends of both the connecting tube mounting groove 14 and the guide groove 16 facing the blade 2 penetrate the side wall of the handle 1.

[0032] In this embodiment, the opening ends of the connecting tube mounting groove 14 and the drug receiving groove 6 are both located on the same side as the observation groove 12. When the blade 2 is installed, the connecting tube 9 on it will automatically be inserted into the connecting tube mounting groove 14. Then, the rubber slider 15 is moved by the pry bar 17 so that the connecting tube 9 is inserted into the through hole 19 of the rubber slider 15. The diameter of the through hole 19 should be smaller than the outer diameter of the connecting tube 9, so as to effectively prevent drug leakage.

[0033] In this embodiment, the connector is preferably a disposable product, which should be replaced with a new one after use to prevent the growth of bacteria.

[0034] Furthermore, a pressing plate 21 is rotatably mounted on one side of the handle 1 via a rotating shaft 20. A pressure block 22 is fixed to the end of the pressing plate 21 away from the rotating shaft 20, and the pressure block 22 is plugged into the drug receiving slot 6. The pressing plate 21 and pressure block 22 facilitate the compression of the drug capsule 7. The drug capsule 7 is made of soft plastic, while the dispensing tube 8 on the drug capsule 7 is made of hard plastic. In this embodiment, the drug capsule 7 is a disposable product; a new drug capsule 7 is replaced each time it is used. The 1% lidocaine content in the drug capsule 7 is only sufficient for one use.

[0035] The working principle of this utility model is as follows: When using the new blade 2, connector, and medicine capsule 7, remove their packaging and first insert the rubber slider 15 into the connecting tube mounting groove 14. The connecting rod 18 is located in the guide groove 16. Move the lever 17 backward to move the rubber slider 15 to the rear end of the connecting tube mounting groove 14. Then install the blade 2. Once the blade 2 is in place, the connecting tube 9 on the blade 2 enters the connecting tube mounting groove 14. Push the lever 17 forward, and the rubber slider 15 moves, inserting the connecting tube 9 into the through hole 19 of the rubber slider 15. Then, insert the medicine capsule 7 into the medicine receiving groove 6. The dispensing tube 8 on the medicine capsule 7 is now coaxial with the connecting tube 9. Move the lever 17 backward to retract the rubber slider 15 a certain distance, so that both the connecting tube 9 and the dispensing tube 8 are located in the through hole 19. Then, rotate the pressing plate 21, causing the pressing block 22 on the pressing plate 21 to enter the medicine receiving groove 6, pressing the medicine capsule 7.

[0036] Hold the handle 1 and gently press the pressing plate 21 with your thumb. The pressing block 22 squeezes the drug capsule 7. The 1% lidocaine in the drug capsule 7 reaches the tip of the blade 2 through the drug outlet tube 8, through hole 19, connecting tube 9, and drug flow channel 4. When the blade tip enters the subcutaneous tissue, the 1% lidocaine is injected into the subcutaneous tissue to achieve local anesthesia.

[0037] If a blood vessel wall is accidentally punctured, blood will quickly enter the blood flow channel 5 under pressure. Doctors can immediately see the blood through the observation slot 12 and take immediate measures to prevent further damage to the blood vessel.

[0038] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this utility model. The above description is only a preferred embodiment of this utility model, but the scope of implementation of this utility model is not limited to what is shown in the drawings. Any changes made in accordance with the concept of this utility model, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, shall be within the protection scope of this utility model.

Claims

1. A skin expander comprising a handle (1) and a blade (2), characterized in that: One end of the handle (1) has a blade mounting rack (3), the blade (2) is mounted on the handle (1) through the blade mounting rack (3), the blade (2) is formed with a drug flow channel (4) and a blood flow channel (5), the handle (1) is provided with a drug containing groove (6), the drug containing groove (6) is mounted with a medicine bag (7), the medicine bag (7) has a medicine outlet pipe (8), the tail end of the blade (2) has a connecting pipe (9), the connecting pipe (9) communicates with the drug flow channel (4), and the connecting pipe (9) is connected with the medicine outlet pipe (8) through a connecting piece.

2. A barker as claimed in claim 1 wherein: The blade mounting rack (3) is formed with a blade clamping groove (10), and the blade (2) has a blade mounting groove (11).

3. A barker as claimed in claim 1 wherein: The drug flow channel (4) and the blood flow channel (5) are close to the blade back of the blade (2), one end of the drug flow channel (4) and the blood flow channel (5) is located at the blade tip position of the blade (2), and the other end of the drug flow channel (4) communicates with the connecting pipe (9).

4. A barker as claimed in claim 3 wherein: An observation groove (12) is formed on one side of the blade (2), the observation groove (12) communicates with the blood flow channel (5), the length of the observation groove (12) is less than the length of the blade (2), and a transparent cover plate (13) is fixedly arranged on the observation groove (12).

5. The expander of claim 1 wherein: The connecting piece comprises a rubber sliding block (15), a push piece (17) and a connecting rod (18), one end of the handle (1) has a connecting pipe mounting groove (14) formed with the blade mounting rack (3), the rubber sliding block (15) is slidingly installed in the connecting pipe mounting groove (14), a guide groove (16) is formed on the top surface of the handle (1), the push piece (17) is located on the top of the handle (1), the push piece (17) is connected with the rubber sliding block (15) through the connecting rod (18), the connecting rod (18) is located in the guide groove (16), and a through hole (19) is formed in the rubber sliding block (15).

6. A barker as claimed in claim 5 wherein: The drug containing groove (6) communicates with the connecting pipe mounting groove (14).

7. An expander as claimed in claim 6, wherein: One side of the handle (1) is rotationally installed with a pressing plate (21) through a rotating shaft (20), one end of the pressing plate (21) away from the rotating shaft (20) is fixedly provided with a pressing block (22), and the pressing block (22) is in plug-in connection with the drug containing groove (6).

Images