CN116098676A - Medical drill bit - Google Patents
Medical drill bit Download PDFInfo
- Publication number
- CN116098676A CN116098676A CN202310107501.9A CN202310107501A CN116098676A CN 116098676 A CN116098676 A CN 116098676A CN 202310107501 A CN202310107501 A CN 202310107501A CN 116098676 A CN116098676 A CN 116098676A
- Authority
- CN
- China
- Prior art keywords
- rod
- mounting groove
- proximal end
- blades
- distal end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1613—Component parts
- A61B17/1615—Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1613—Component parts
- A61B17/1622—Drill handpieces
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1659—Surgical rasps, files, planes, or scrapers
Abstract
The utility model discloses a medical drill, which comprises a rod body, wherein a mounting groove is formed in the distal end face of the rod body, an axially arranged long through hole is formed in the rod body, the distal end of the long through hole is communicated with the mounting groove, the proximal end of the long through hole penetrates through the proximal end face of the rod body, a push rod is arranged in the long through hole, the distal end of the push rod extends into the mounting groove, the proximal end of the push rod extends to the outer side of the proximal end of the rod body, two blades are arranged in the mounting groove and are respectively positioned at two opposite sides of the distal end of the push rod, the blades are hinged in the mounting groove, a connecting rod is arranged between the blades and the distal end of the push rod, two ends of the connecting rod are respectively hinged to the blades and the distal end of the push rod, the proximal end of the push rod is in threaded connection with a sleeve, the sleeve is rotatably mounted on the rod body, a support frame is fixedly arranged at the proximal end of the rod body, and the proximal end of the push rod is axially and slidably arranged on the support frame along the rod body. The purpose is to provide a medical drill with a blade which is not easy to break and can be easily controlled to open and close.
Description
Technical Field
The utility model relates to the field of medical equipment, in particular to a drill bit used for treating early femoral head necrosis and performing a core decompression operation.
Background
Femur head necrosis (OsteonecrosisoftheFemoralHead, ONFH), also known as avascular necrosis of the femoral head (ANFH), is a series of pathological processes caused by the blood supply disorder of some femoral heads due to different causes. The literature reports that the onset age of femoral head necrosis patients in China is between 35 and 55, 15 to 30 thousands of cases are newly increased every year, and the accumulated cases needing treatment are between 500 and 750 thousands. Etiology mainly includes traumatism and non-traumatism. Non-traumatic femoral head necrosis is mostly related to the use of glucocorticoid, alcoholism, connective tissue diseases and some hematopathy, and the pathogenesis is not clear. However, both traumatic and non-traumatic femoral head necrosis are common features in that blood circulation disorders cause ischemia and necrosis of the femoral head. Because the organism has natural repair capability to the necrotic area, when the new bone cells grow along with the new blood vessels to the necrotic area and form new bones, the necrotic trabeculae will be gradually absorbed, the mechanical property of the bones is obviously weakened in the process, and the normal load can cause the collapse deformation of the femoral head and the degenerative arthritis of the hip joint, and the clinical symptoms mainly including pain and movement disorder appear at the same time. The only basic method with definite curative effect and recommended together for head protection treatment of early femoral head necrosis in femoral head necrosis treatment guidelines is core decompression. The core decompression operation is to reduce the pressure load in the femoral head and penetrate partial hardening plate obstacle to delay the progress of femoral head necrosis. The action mechanism is three: firstly, reducing intra-osseous pressure, promoting venous return in necrotic areas and improving local microcirculation; secondly, the bone tissue in the necrotic area is effectively removed, and the repair of the necrotic area and the ingrowth of the new bone tissue are promoted; thirdly, promoting the growth of new blood vessels and restoring the blood supply of the necrotic area. On the basis of the decompression of the marrow core, other means can be compounded, including methods of combined negative pressure suction, stem cell transplantation, tissue engineering bone transplantation, structural support and the like. But undoubtedly, core decompression is the basis for these methods. At present, the minimally invasive concept is gradually accepted and popularized, the idea of designing a surgical tool with small wound and thorough removal of dead bone is developed, through early-stage review of the literature, we find that the Chinese patent application number is CN202120082436.5, the authorized announcement date is 2021, 12 months and 31 days, and the adjustable reducing reamer for repairing femoral head necrosis is named as the reamer, and the reamer comprises a connecting rod, a cutter handle, a blade and a sleeve, wherein the connecting rod is connected with the cutter handle, a connecting seat is arranged on the connecting rod, threads are arranged in the connecting seat, corresponding threads are also arranged on the connecting rod, a guide sleeve is arranged below the connecting seat and on the connecting rod, a sleeve is further arranged outside the guide sleeve, a handle is arranged on the sleeve, a supporting rod is arranged on the cutter handle, one end of the supporting rod is of a small diameter, the other end of the small diameter is arranged in the guide sleeve, one end of the large diameter is identical with the outer diameter of the guide sleeve, an inclined surface is arranged on the supporting rod, and the blade is arranged on the inclined surface and hinged on the cutter handle. When the reamer is used, the reamer handle is driven to move forwards through the rotation of the connecting rod, the blade is hinged with the reamer handle, the inclined surface of the supporting rod abuts against the blade to enable the blade to open, the blade scrapes necrotic bone tissues, the connecting rod reverses to drive the reamer handle to move backwards, the sleeve is held, the connecting rod drives the reamer handle to be pulled out, and the sleeve abuts against the blade to enable the blade to be closed. Therefore, the reamer is hinged to the two opposite sides of the cutter handle respectively, is easy to break or fall off from the cutter handle when necrotic bone tissue is scraped off, and is not easy to control the opening and closing of the blade, so that the reamer is limited in clinical application and popularization.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a medical drill with a blade which is not easy to break and can easily control the opening and closing of the blade.
The utility model relates to a medical drill bit, which comprises a rod body, wherein a mounting groove is formed in the end face of the distal end of the rod body, the mounting groove penetrates through the side wall of the rod body, an axially arranged long through hole is formed in the rod body, the distal end of the long through hole is communicated with the mounting groove, the proximal end of the long through hole penetrates through the end face of the proximal end of the rod body, a push rod is arranged in the long through hole, the distal end of the push rod extends into the mounting groove, the proximal end of the push rod extends to the outer side of the proximal end of the rod body, two blades are arranged in the mounting groove and are respectively positioned on two opposite sides of the distal end of the push rod, the blades are hinged in the mounting groove, a connecting rod is arranged between the blades and the distal end of the push rod, two ends of the connecting rod are respectively hinged to the blades and the distal end of the push rod, the proximal end of the push rod is in threaded connection with a sleeve, the sleeve is rotatably arranged on the rod body, a support frame is fixedly arranged at the proximal end of the rod body, and the proximal end of the push rod is arranged on the support frame in a sliding mode along the axial direction of the rod body.
The medical drill bit comprises a mounting groove, wherein the bottom wall of the mounting groove is fixedly provided with two first hinge lugs, the two first hinge lugs are respectively positioned on two opposite sides of the far end of a push rod, and the near ends of two blades are respectively hinged on the two first hinge lugs through first pin shafts.
The medical drill bit is characterized in that the two blades are fixedly provided with second hinge lugs, one ends of the two connecting rods are hinged to the two second hinge lugs through second pin shafts respectively, and the other ends of the two connecting rods are hinged to the far ends of the ejector rods through third pin shafts.
The medical drill bit comprises a mandrel, a first pin shaft, a second pin shaft, a first support plate, a second support plate, a connecting rod, a third pin shaft, a first support plate, a second support plate, a third pin shaft, a first support plate and a second support plate, wherein the first support plate is arranged on the end face of the distal end of the mandrel in an opposite mode, the third pin shaft is fixedly connected between the first support plates, the second support plate is arranged on the end face of the other end of the connecting rod in an opposite mode, the second support plate is rotatably arranged on the third pin shaft, the other end of the connecting rod is rotatably arranged on the third pin shaft, and the other end of the connecting rod is located between the second support plates.
The medical drill comprises a rod body, wherein a sleeve is arranged at the center hole of the annular plate in a rotating mode through a bearing, and the sleeve and a long through hole are coaxially arranged.
The medical drill comprises a support frame, wherein the support frame comprises two support plates which are oppositely arranged, the distal ends of the two support plates are fixedly connected to the annular plate, the proximal end of a push rod is positioned between the two support plates, sliding grooves which are axially arranged along a rod body are formed in the two support plates, a sliding rod is fixedly arranged at the proximal end of the push rod, and two ends of the sliding rod are respectively arranged in the two sliding grooves in a sliding mode.
The medical drill is characterized in that the supporting plate is provided with scale marks which are axially arranged along the rod body, and the numerical value of each scale mark is the maximum distance between two blades along the radial direction of the rod body.
The medical drill of the utility model, wherein the rod body is cylindrical, and the peripheral side wall of the rod body is provided with a spiral guide groove.
The medical drill is different from the prior art in that when the medical drill is used, in an initial state, two blades are positioned in the mounting groove, then the distal end of the rod body is inserted into a necrosis area in the femoral head, then a doctor keeps the rod body stationary and rotates the sleeve, and as the proximal end of the ejector rod is in threaded connection with the sleeve and is arranged on the support frame in a sliding manner along the axial direction of the rod body, the sleeve can not drive the ejector rod to rotate together, but only enables the ejector rod to slide along the axial direction of the rod body, and at the moment, the distal end of the ejector rod pushes the two blades away from the self through the two connecting rods, namely the two blades are pushed out of the mounting groove (the blades are opened). After the blade is pushed out of the mounting groove (the proximal end of the ejector rod is in threaded connection with the sleeve, so that the open state of the blade is locked at the moment), the blade can scrape the hard dead bone inside the femoral head by rotating the rod body. Because the blade articulates in the mounting groove, after the blade is pushed out the mounting groove, a part of blade still is located the mounting groove, when the blade strikes off the operation, the blade can offset with the cell wall of mounting groove, and the mounting groove can support the blade like this, strengthens its intensity, consequently under the protection of mounting groove, the blade is difficult to the rupture. After the scraping operation is finished, the sleeve is reversely rotated, the two blades can be pulled back into the mounting groove through the two connecting rods by the far end of the ejector rod, the blades are closed (the closed state of the blades is locked at the moment because the near end of the ejector rod is in threaded connection with the sleeve), and then the far end of the rod body is pulled out from the femoral head. It follows that the blade is easier to control and is less likely to break when performing the scraping operation, since the doctor can open and close the blade by rotating the sleeve.
The utility model is further described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a front view of a medical drill of the present utility model (blade in closed position);
FIG. 2 is a top view of the medical drill of the present utility model (blade in closed position);
FIG. 3 is an enlarged view of the distal end face of the shaft of FIG. 2;
FIG. 4 is a front view of the distal end of the ejector pin of the present utility model;
FIG. 5 is a left/right view of the distal end of the ejector pin of the present utility model;
FIG. 6 is a front cross-sectional view of the medical drill of the present utility model (with the blades in a closed state);
FIG. 7 is a left side view of the medical drill of the present utility model (blade in closed position);
FIG. 8 is a front view of the medical drill of the present utility model (with the blades in an open state);
fig. 9 is a front cross-sectional view of a medical drill of the present utility model (with the blades in an open state).
Detailed Description
It should be noted that, in this embodiment, "distal" and "proximal" are relative to the doctor of the user of the medical drill of the present utility model, namely: the direction away from the physician is called the distal end and the direction close to the physician is called the proximal end.
As shown in fig. 1 and in combination with fig. 2-9, the medical drill of the present utility model includes a rod 10, a mounting groove 24 is provided on a distal end surface of the rod 10, the mounting groove 24 penetrates through a side wall of the rod 10, an axially arranged long through hole 31 is provided in the rod 10, a distal end of the long through hole 31 is communicated with the mounting groove 24, a proximal end of the long through hole 31 penetrates through a proximal end surface of the rod 10, a push rod 16 is provided in the long through hole 31, a distal end of the push rod 16 extends into the mounting groove 24, a proximal end of the push rod 16 extends to an outer side of the proximal end of the rod 10, two blades 22 are provided in the mounting groove 24, the two blades 22 are respectively located at opposite sides of the distal end of the push rod 16, the blades 22 are hinged in the mounting groove 24, a connecting rod 21 is provided between the distal ends of the blades 22 and the push rod 16, both ends of the connecting rod 21 are respectively hinged on the distal ends of the blades 22 and the push rod 16, a proximal end of the push rod 16 is screwed in a sleeve 11, the sleeve 11 is rotatably mounted on the rod 10, a proximal end of the rod 10 is fixedly provided with a support frame 12, and a proximal end of the rod 12 is axially slidably provided on the support frame 12. When the jack 16 moves in the axial direction of the rod body 10, the distal end of the rod body 10 can push or pull the blade 22 out of or back into the mounting groove 24 through the link 21. When the two blades 22 are pushed out of the mounting groove 24, the two blades 22 are in an open state; when the two blades 22 are pulled back into the mounting slot 24, the two blades 22 are in a closed state.
As shown in fig. 2, 3, 6, 7 and 9, the mounting groove 24 in this embodiment is a rectangular groove, and the mounting groove 24 includes two opposite side walls and a bottom wall, and when two blades 22 are disposed in the mounting groove 24, a gap is left between the blades 22 and the side walls of the mounting groove 24 so that the blades 22 can be pushed out or pulled back into the mounting groove 24, but the gap is relatively small so that the blades 22 can abut against the side walls of the mounting groove 24 when scraping off the hard dead bone of the femoral head, so that the mounting groove 24 can support the blades 22, strengthen the strength thereof, and prevent breakage.
As shown in fig. 1, and in combination with fig. 2 to 9, in the initial state, when the medical drill of the present utility model is in use, both blades 22 are positioned in the mounting groove 24, then the distal end of the rod 10 is inserted into the necrotic area inside the femoral head, then the doctor holds the rod 10 stationary and rotates the sleeve 11, since the proximal end of the push rod 16 is screwed with the sleeve 11, and the proximal end of the push rod 16 is slidably disposed on the support frame 12 along the axial direction of the rod 10, the sleeve 11 does not drive the push rod 16 to rotate together, but only slides the push rod 16 along the axial direction of the rod 10, at this time, the distal end of the push rod 16 pushes both blades 22 away from itself through the two links 21, i.e., pushes both blades 22 out of the mounting groove 24 (realizes the blade opening). After the blade 22 is pushed out of the mounting groove 24 (because the proximal end of the push rod 16 is screwed with the sleeve 11, the open state of the blade 22 is locked at this time), the rod body 10 is rotated to scrape the hard dead bone inside the femoral head by the blade 22. Since the blade 22 is hinged in the mounting groove 24, after the blade 22 is pushed out of the mounting groove 24, a part of the blade 22 is still positioned in the mounting groove 24, and when the blade 22 scrapes off, the blade 22 can abut against the groove wall of the mounting groove 24, so that the mounting groove 24 can support the blade 22 to strengthen the strength, and the blade 22 is not easy to break under the protection of the mounting groove 24. After the scraping operation is finished, the sleeve 11 is reversely rotated, the distal end of the ejector rod 16 can pull the two blades 22 back into the mounting groove 24 through the two connecting rods 21, closing of the blades 22 is achieved (the closed state of the blades 22 is locked at this time because the proximal end of the ejector rod 16 is in threaded connection with the sleeve 11), and then the distal end of the rod body 10 is pulled out from the femoral head. It follows that the doctor is more easy to control and that the blade 22 is not easily broken when performing the scraping operation, since the doctor can open and close the blade 22 by rotating the sleeve 11.
As shown in fig. 6, 7 and 9, the medical drill of the present utility model is characterized in that two first hinge lugs 28 are fixedly arranged on the bottom wall of the mounting groove 24, the two first hinge lugs 28 are respectively located at two opposite sides of the distal end of the ejector rod 16, and the proximal ends of the two blades 22 are respectively hinged to the two first hinge lugs 28 through first pin shafts 27. The two blades 22 are fixedly provided with second hinge lugs 25, one ends of the two connecting rods 21 are hinged to the two second hinge lugs 25 through second pin shafts 26 respectively, and the other ends of the two connecting rods 21 are hinged to the far ends of the ejector rods 16 through third pin shafts 23.
The second hinge lug 25 is fixedly provided at an intermediate position of the blade 22, and as shown in fig. 6, the first pin 27, the second pin 26 and the third pin 23 are arranged in a proximal-to-distal direction. When the blade 22 is changed from the closed state to the open state, the sleeve 11 is rotated to slide the jack 16 downward along the axial direction of the rod body 10 (i.e., slide in the proximal direction from the distal end), and since both ends of the link 21 are hinged to the distal ends of the blade 22 and the jack 16, respectively, and the proximal ends of the blade 22 are hinged to the first hinge lugs 28, the distal ends of the jack 16 can push the distal ends of the two blades 22 out of the mounting grooves 24 through the two links 21, as shown in fig. 9, when the two blades 22 are in the open state. When the blades 22 are changed from the open state to the closed state, the sleeve 11 is reversely rotated to slide the jack 16 upward along the axial direction of the shaft body 10 (i.e., slide in the distal direction from the proximal end), so that the distal ends of the jack 16 can pull the distal ends of the two blades 22 back to the mounting groove 24 through the two links 21, as shown in fig. 6, when the two blades 22 are in the closed state.
As shown in fig. 2-5, the medical drill of the present utility model is characterized in that two first support plates 19 arranged oppositely are disposed on the distal end face of the ejector rod 16, the third pin shaft 23 is fixedly connected between the two first support plates 19, two second support plates 20 arranged oppositely are fixedly disposed on the other end face of one connecting rod 21, the two second support plates 20 are rotatably mounted on the third pin shaft 23, the other end of the other connecting rod 21 is rotatably mounted on the third pin shaft 23, and the other end of the other connecting rod 21 is located between the two second support plates 20. The other end of the other link 21 is placed between the two second support plates 20 in order to make the pushing/pulling forces of the two links 21 to the blade 22 more uniform.
The second support plate 20 is rotatably mounted on the third pin 23 in the following manner: the second support plate 20 is provided with a through hole, the second support plate 20 is sleeved on the third pin shaft 23 through the through hole on the second support plate 20, and the third pin shaft 23 is in clearance fit with the through hole, so that the second support plate 20 can rotate around the third pin shaft 23. The other end of the other link 21 is rotatably mounted on the third pin 23 in the same manner as the second support plate 20 is rotatably mounted on the third pin 23, and will not be described again.
As shown in fig. 1, 6-9, the medical drill of the present utility model is characterized in that an annular plate 17 is fixedly disposed on the proximal end surface of the rod body 10, the sleeve 11 is rotatably mounted at the central hole of the annular plate 17 through a bearing 30, and the sleeve 11 is coaxially disposed with the long through hole 31. That is, the sleeve 11 is rotatably mounted on the rod body 10 through the bearing 30 and the annular plate 17. The inner wall of the sleeve 11 is provided with an inner thread, the outer side wall of the ejector rod 16 is provided with an outer thread, and the ejector rod 16 is in threaded connection with the sleeve 11 through the inner thread and the outer thread.
As shown in fig. 1, 2 and 6-9, the medical drill of the present utility model, wherein the supporting frame 12 includes two supporting plates 15 arranged oppositely, distal ends of the two supporting plates 15 are fixedly connected to the annular plate 17, a proximal end of the ejector rod 16 is located between the two supporting plates 15, sliding grooves 29 axially arranged along the rod body 10 are formed in the two supporting plates 15, a sliding rod 13 is fixedly arranged at the proximal end of the ejector rod 16, and two ends of the sliding rod 13 are respectively slidably arranged in the two sliding grooves 29. That is, the support frame 12 is fixedly provided to the rod body 10 through the annular plate 17. When the ejector pin 16 slides along the axial direction of the rod body 10, the slide bar 13 slides along the two slide grooves 29.
As shown in fig. 1 and 8, the medical drill of the present utility model is characterized in that the supporting plate 15 is provided with graduation marks 14 axially arranged along the rod body 10, and the numerical value of the graduation marks 14 is the maximum distance between two blades 22 along the radial direction of the rod body 10. As described above, when the push rod 16 slides downward along the axial direction of the rod body 10, the two blades 22 can be changed from the closed state to the open state, the larger the downward sliding distance of the push rod 16 is, the larger the opening angle of the two blades 22 is (i.e. the larger the maximum distance between the two blades 22 along the radial direction of the rod body 10 is), so that the doctor can determine the opening angle of the two blades 22 according to the position of the scale mark 14 indicated by the slide rod 13, so as to adjust the opening angle according to actual needs.
As shown in fig. 1-3, 7 and 8, the medical drill of the present utility model is characterized in that the rod body 10 is cylindrical, and a spiral guide groove 18 is provided on the outer peripheral sidewall of the rod body 10. Because the spiral guide groove 18 is arranged on the peripheral side wall of the rod body 10, when the rod body 10 is rotated to scrape hard dead bones in the femoral head, the broken bone fragments scraped by the blade 22 can be discharged to the outside of the femoral head along the spiral guide groove 18 along with the rotation of the rod body 10, that is, when the rod body 10 is rotated, the hard dead bones can be scraped by the blade 22, and meanwhile, the scraped broken bone fragments can be discharged to the outside of the femoral head along the spiral guide groove 18.
As shown in fig. 1, and in combination with fig. 2 to 9, when the medical drill of the present utility model is used, in an initial state, both blades 22 are positioned in the mounting groove 24, then the distal end of the rod 10 is inserted into the necrotic area inside the femoral head, then the doctor holds the rod 10 stationary and rotates the sleeve 11, since the proximal end of the push rod 16 is screwed with the sleeve 11, and the proximal end of the push rod 16 is provided on the support frame 12 by sliding the slide rod 13 along the axial direction of the rod 10, the sleeve 11 cannot drive the push rod 16 to rotate together, but only the push rod 16 slides along the axial direction of the rod 10, at this time, the distal end of the push rod 16 pushes both blades 22 away from itself through the two links 21, i.e., the distal end sides of both blades 22 are pushed out of the mounting groove 24 (realizing the opening of the blades 22). After the distal end of the blade 22 is pushed out of the mounting groove 24 (because the proximal end of the plunger 16 is screwed to the sleeve 11, the open state of the blade 22 is locked at this time), the rod body 10 is rotated to scrape the hard dead bone inside the femoral head by the blade 22. Since the proximal end of the blade 22 is hinged in the mounting groove 24, a portion of the blade 22 (i.e., the proximal end side) is still located in the mounting groove 24 after the distal end side of the blade 22 is pushed out of the mounting groove 24, and the blade 22 abuts against the groove wall of the mounting groove 24 when the blade 22 is scraped, the mounting groove 24 can support the blade 22 to enhance the strength thereof, and therefore the blade 22 is not easily broken under the protection of the mounting groove 24. The crushed bone fragments scraped off by the blade 22 are discharged to the outside of the femoral head along the spiral guide groove 18 while the scraping operation is performed. After the scraping operation is completed, the distal end of the rod body 10 is pulled out from the femoral head after the distal end of the rod body 16 is pulled back into the mounting groove 24 by the two links 21 by reversely rotating the sleeve 11 (the proximal end of the rod body 16 is screwed to the sleeve 11, and the closed state of the blade 22 is locked). It follows that the doctor is more easy to control and that the blade 22 is not easily broken when performing the scraping operation, since the doctor can open and close the blade 22 by rotating the sleeve 11.
It should be noted that, the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "front", "rear", "left", "right", "middle", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The above examples are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solution of the present utility model should fall within the scope of protection defined by the claims of the present utility model without departing from the spirit of the present utility model.
Claims (8)
1. A medical drill, characterized in that: including the body of rod, be equipped with the mounting groove on the distal end terminal surface of the body of rod, the mounting groove runs through the lateral wall of the body of rod, be equipped with the long through-hole of axial arrangement in the body of rod, the distal end and the mounting groove intercommunication of long through-hole, the proximal end of long through-hole runs through the proximal end terminal surface of the body of rod, be equipped with the ejector pin in the long through-hole, the distal end of ejector pin extends to the mounting groove, the proximal end of ejector pin extends to the proximal end outside of the body of rod, be equipped with two blades in the mounting groove, two the blade is located the relative both sides of ejector pin distal end respectively, the blade articulates in the mounting groove, be equipped with the connecting rod between the distal end of blade and ejector pin, the both ends of connecting rod articulate respectively on the distal end of blade and ejector pin, the proximal end threaded connection of ejector pin is in a sleeve, the sleeve rotates to install on the body of rod, the proximal end of rod is fixed to be equipped with the support frame, the proximal end of ejector pin is established on the support frame along the axial sliding of the body of rod.
2. The medical drill according to claim 1, wherein: two first hinge lugs are fixedly arranged on the bottom wall of the mounting groove, the two first hinge lugs are respectively positioned on two opposite sides of the far end of the ejector rod, and the near ends of the two blades are respectively hinged on the two first hinge lugs through first pin shafts.
3. The medical drill according to claim 2, wherein: the two blades are fixedly provided with second hinge lugs, one ends of the two connecting rods are hinged to the two second hinge lugs through second pin shafts respectively, and the other ends of the two connecting rods are hinged to the far ends of the ejector rods through third pin shafts.
4. A medical drill according to claim 3, wherein: two first support plates which are oppositely arranged are arranged on the end face of the far end of the ejector rod, a third pin shaft is fixedly connected between the two first support plates, two second support plates which are oppositely arranged are fixedly arranged on the end face of the other end of the connecting rod, the two second support plates are rotatably arranged on the third pin shaft, the other end of the connecting rod is rotatably arranged on the third pin shaft, and the other end of the connecting rod is positioned between the two second support plates.
5. The medical drill according to claim 4, wherein: the annular plate is fixedly arranged on the proximal end face of the rod body, the sleeve is rotatably arranged at the central hole of the annular plate through a bearing, and the sleeve and the long through hole are coaxially arranged.
6. The medical drill according to claim 5, wherein: the support frame includes two relatively arranged's backup pad, two the equal fixed connection of distal end of backup pad is in on the annular plate, the proximal end of ejector pin is located between two backup pads, two all be equipped with along the spout of body of rod axial arrangement in the backup pad, the proximal end of ejector pin is fixed with the slide bar, the both ends of slide bar are slided respectively and are established in two spouts.
7. The medical drill according to claim 6, wherein: the support plate is provided with scale marks axially arranged along the rod body, and the numerical value of each scale mark is the maximum distance between two blades along the radial direction of the rod body.
8. The medical drill according to claim 7, wherein: the rod body is cylindrical, and a spiral guide groove is formed in the peripheral side wall of the rod body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310107501.9A CN116098676A (en) | 2023-01-31 | 2023-01-31 | Medical drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310107501.9A CN116098676A (en) | 2023-01-31 | 2023-01-31 | Medical drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116098676A true CN116098676A (en) | 2023-05-12 |
Family
ID=86253935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310107501.9A Pending CN116098676A (en) | 2023-01-31 | 2023-01-31 | Medical drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116098676A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2469895Y (en) * | 2001-03-21 | 2002-01-09 | 王玉山 | Sneak-dilating decompressor for head of femur |
| US20060241629A1 (en) * | 2005-04-07 | 2006-10-26 | Zimmer Technology, Inc. | Expandable reamer |
| CN102038544A (en) * | 2009-10-19 | 2011-05-04 | 上海贝奥路生物材料有限公司 | Stealth blade for treating aseptic caput femoris necrosis |
| CN109736715A (en) * | 2019-01-18 | 2019-05-10 | 江苏东合南岩土科技股份有限公司 | The construction method of variable cross-section spiral drill and variable cross-section cast-in-situ bored pile |
| CN113116605A (en) * | 2019-12-31 | 2021-07-16 | 杭州德晋医疗科技有限公司 | Support and annuloplasty device |
| CN113116412A (en) * | 2019-12-30 | 2021-07-16 | 北京术锐技术有限公司 | Miniature surgical tool head |
| CN215349251U (en) * | 2021-01-12 | 2021-12-31 | 宿迁市浩欣机械有限公司 | Adjustable reducing reamer for femoral head necrosis repair |
-
2023
- 2023-01-31 CN CN202310107501.9A patent/CN116098676A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2469895Y (en) * | 2001-03-21 | 2002-01-09 | 王玉山 | Sneak-dilating decompressor for head of femur |
| US20060241629A1 (en) * | 2005-04-07 | 2006-10-26 | Zimmer Technology, Inc. | Expandable reamer |
| CN102038544A (en) * | 2009-10-19 | 2011-05-04 | 上海贝奥路生物材料有限公司 | Stealth blade for treating aseptic caput femoris necrosis |
| CN109736715A (en) * | 2019-01-18 | 2019-05-10 | 江苏东合南岩土科技股份有限公司 | The construction method of variable cross-section spiral drill and variable cross-section cast-in-situ bored pile |
| CN113116412A (en) * | 2019-12-30 | 2021-07-16 | 北京术锐技术有限公司 | Miniature surgical tool head |
| CN113116605A (en) * | 2019-12-31 | 2021-07-16 | 杭州德晋医疗科技有限公司 | Support and annuloplasty device |
| CN215349251U (en) * | 2021-01-12 | 2021-12-31 | 宿迁市浩欣机械有限公司 | Adjustable reducing reamer for femoral head necrosis repair |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20060224160A1 (en) | Instruments and methods for aggressive yet continuous tissue removal | |
| JP2008504107A (en) | Joint surface replacement system | |
| CN101677823A (en) | Tissue cavitation device and method | |
| DE602005001564T2 (en) | Acetabulum instrument | |
| CN219742805U (en) | Medical drill bit | |
| CN116098676A (en) | Medical drill bit | |
| CN2469895Y (en) | Sneak-dilating decompressor for head of femur | |
| CN202654185U (en) | Femoral head core decompression bit | |
| CN110226971A (en) | A kind of operation tool packet for caput femoris necrosis bone grafting | |
| CN205586067U (en) | Bone cement cracker in pulp cavity | |
| CN213821894U (en) | Medullary cavity reaming guide device for femoral prosthesis revision surgery | |
| CN217162208U (en) | Core decompression sneak scraper for treating avascular necrosis of femoral head | |
| CN206852635U (en) | The full vertebral column minimally invasive bone drill of location type and full vertebral column minimally invasive approach shaping jig | |
| CN217859126U (en) | Adjustable reamer | |
| CN102688081A (en) | Femoral head medulla core decompression drill bit | |
| CN114145808B (en) | Acetabular tool, acetabular file system and acetabular trial mould system | |
| CN112450997A (en) | Instrument for transforaminal endoscopic fusion operation and use method thereof | |
| CN213129727U (en) | Soft drill for removing long-dry bone intramedullary focus | |
| CN220558080U (en) | Tantalum rod extraction instrument for femoral head reconstruction | |
| CN205814379U (en) | A kind of pulp cavity bone cement extractor | |
| CN105534564B (en) | A kind of pulp cavity bone cement extractor | |
| CN219070537U (en) | Rotary cutter | |
| CN214073551U (en) | Minimally invasive reduction tool for compression fracture | |
| CN215778405U (en) | Endplate lifting scraper for interbody fusion operation | |
| CN219207152U (en) | Cartilage endplate abrader |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |