CN211381597U - Drill bit for total hip joint replacement minimally invasive surgery - Google Patents
Drill bit for total hip joint replacement minimally invasive surgery Download PDFInfo
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- CN211381597U CN211381597U CN201921398820.5U CN201921398820U CN211381597U CN 211381597 U CN211381597 U CN 211381597U CN 201921398820 U CN201921398820 U CN 201921398820U CN 211381597 U CN211381597 U CN 211381597U
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- cutting head
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Abstract
The utility model discloses a drill bit for total hip joint replacement minimally invasive surgery, constitute the flexible axle by the spring that has certain rigidity and has certain flexibility simultaneously, the flexible axle both ends welded connection stalk portion, cutting head respectively, put into stainless steel spacer sleeve in the puncture hole near the operation incision, the cutting head of flexible axle lower extreme is put into along the spacer sleeve inner chamber, put into spacing uide bushing in the operation incision through operating handle, drive the cutting head through the flexible axle and along spacing uide bushing spacing drilling downwards, can not harm important structures such as patient's muscle nerve when high-speed rotatory, spacing uide bushing can avoid drilling too deeply and get into the pelvic cavity; the cutting head is made of 316L stainless steel, so that the serious consequence that the drill bit is broken in the acetabular bone when the drill is drilled in a bending state and cannot be taken out is avoided, and after the drill is finished, a screw with a proper length is screwed in along the inner cavity of the isolation sleeve through the direction-changeable screwdriver so as to reinforce and fixedly connect the acetabular metal component, so that the cutting head is safe, reliable and convenient to operate.
Description
Technical Field
The invention relates to a drill bit for a total hip replacement minimally invasive surgery.
Background
The traditional total hip joint replacement operation needs to cut off external circumflex muscles and destroy the integrity of a joint capsule, so that the functions of muscles around the hip joint are affected, surgical dislocation is needed in the operation process, and multiple persons are needed to cooperate and finish the operation; the SUPERPATH minimally invasive total hip joint replacement operation only has 6-8 cm of incision length, does not need to cut off the external rotator muscle in the operation process, and almost keeps all muscle functions around the hip joint and a complete joint capsule after entering through the gap between the Plough muscle and the gluteus minimus; surgical dislocation is not needed in the operation process, extreme rotation and distortion of limbs are not caused in the operation, and the operation can be completed only by the assistance of a main knife and a booster 2 person, so that the operation becomes a target which is always explored by joint surgeons; the technology is originated by doctor James Chow of saint road medicine Center of Phoenix city, Arizona, USA, (St. Luke's Medical Center, Phoenix, Arizona, USA), and a supppat entry (supperlaterperfect rational acquired Total Hip) is improved by a standard posterior entry, and the supppat entry retains all the advantages of the standard posterior entry, can be further extended, and can be easily converted into the standard posterior entry; the operation incision of the minimally invasive total hip joint replacement operation is small and deep, has a certain inclination angle, the drill bit needs to extend into a drilling position along a zigzag path, and simultaneously needs to prevent damage to important structures such as a plurality of nerve muscles around the incision, so that the fixing screw of the acetabulum metal part is difficult to implant from the tiny incision, the operation is inconvenient, the drill bit is easy to break in the acetabulum bone when the ordinary hard tool steel drill bit drills in a bending state, and the serious consequence that the drill bit cannot be taken out is caused, and the acetabulum drill bit special for the minimally invasive total hip joint replacement operation, which is safe, reliable and convenient to operate, needs to be provided.
Disclosure of Invention
The invention aims to solve the technical problem of providing a drill bit for the minimally invasive total hip replacement surgery, which can be suitable for the minimally invasive total hip replacement surgery to implant a fixing screw of an acetabulum metal part into a small and deep surgical incision, does not damage a plurality of important structures such as nerve muscles and the like around the incision, is safe and reliable and is convenient to operate.
The invention discloses a drill bit for a total hip replacement minimally invasive surgery, which is characterized in that: the flexible shaft is composed of a section of spring, and two ends of the flexible shaft are fixedly connected to the handle and the cutting head respectively through welding; the cutting head consists of a fixed connecting section positioned at the upper section and a cutting part positioned at the lower section, the diameter of the fixed connecting section is larger than that of the cutting part, so that a limiting step is formed on the outer circumferential surface of the cutting head, a limiting guide sleeve capable of sliding up and down along the cutting part is sleeved outside the cutting part, the outer diameter of the limiting guide sleeve is larger than that of the fixed connecting section of the cutting head, the inner diameter of the limiting guide sleeve is smaller than that of the fixed connecting section of the cutting head, the axial length of the limiting guide sleeve is smaller than that of the cutting part, and an operating handle obliquely arranged is fixedly connected; the flexible shaft is externally sleeved with an isolation sleeve capable of sliding up and down along the flexible shaft, and the relationship among the inner diameter of the isolation sleeve, the diameter of the flexible shaft, the diameter of the fixed connecting section and the diameter of the cutting part is that the inner diameter of the isolation sleeve is larger than the diameter of the fixed connecting section, the diameter of the flexible shaft is larger than the diameter of the cutting part; the axial length of the isolation sleeve is less than that of the flexible shaft;
the diameter of the upper section of the handle part is smaller than that of the lower section of the handle part, so that a clamping head is formed; counter bores are respectively arranged on the lower end face of the handle part and the upper end face of the cutting part, the inner diameter of each counter bore is adapted to the diameter of the flexible shaft, and the upper end and the lower end of the flexible shaft are respectively installed in the counter bores in a matched mode and fixedly connected through welding;
the axial length of the isolation sleeve is 1/3-1/2 of the axial length of the flexible shaft;
the included angle between the operating handle and the axis of the limiting guide sleeve is 30 degrees;
the isolating sleeve and the cutting head are made of medical 316L stainless steel;
the axial length of the limiting guide sleeve is 1/3-1/2 of the axial length of the cutting part;
the outside cover of operating handle upper segment is equipped with anti-skidding cover.
The invention relates to a drill bit for a total hip joint replacement minimally invasive surgery, which is characterized in that a flexible shaft is formed by a spring with certain rigidity and certain flexibility, two ends of the flexible shaft are respectively welded with a handle part and a cutting head, an acetabulum screw fixing hole is additionally established around a surgical incision by 5CM far away, and the puncture is completed by adopting a pointed puncture outfit; a stainless steel isolation sleeve is placed in the puncture hole, a cutting head at the lower end of a flexible shaft is placed along the inner cavity of the isolation sleeve, a limiting guide sleeve is placed in the surgical incision through an operating handle, the cutting head is driven by the flexible shaft to limit a drill hole downwards along the limiting guide sleeve, and the limiting guide sleeve can prevent the drill hole from entering the pelvic cavity too deeply; the head of the flexible long drill bit uses a 316L stainless steel drill bit to replace a hard tool steel drill bit, so that the drill bit can be prevented from being broken in an acetabular bone when drilling in a bending state, and the serious consequence that the drill bit cannot be taken out is avoided; after drilling is finished, a screw with a proper length is screwed in along the inner cavity of the isolation sleeve through a direction-changeable screwdriver so as to reinforce and fixedly connect the acetabulum metal part; the fixing screw of the metal component of the acetabulum can be implanted into a small and deep operation incision in a minimally invasive total hip joint replacement operation, so that a plurality of important structures such as neuromuscular structures around the incision are not damaged, and the fixing screw is safe, reliable and convenient to operate.
Drawings
FIG. 1 is a schematic plan view of a shank, a flexible shaft and a cutting head of a drill for total hip replacement minimally invasive surgery according to an embodiment of the invention;
FIG. 2 is a schematic plan view of the overall structure of a drill for total hip replacement minimally invasive surgery according to an embodiment of the invention;
fig. 3 is a schematic cross-sectional structure of fig. 2.
Detailed Description
As shown in the figure, a drill bit for a total hip replacement minimally invasive surgery is specially made, which has certain flexibility and certain rigidity, so as to solve the problem of how to extend into a precise position from a tiny incision along a tortuous path to drill a hole and implant an acetabular metal component fixing screw; the specific structure comprises a drill bit main body consisting of a handle 1, a flexible shaft 2 and a cutting head 3, wherein the flexible shaft 2 consists of a section of spring with certain flexibility and rigidity, two ends of the flexible shaft 2 are fixedly connected to the handle 1 and the cutting head 3 respectively through welding, and in the operation process, the flexible shaft can drive the cutting head to extend to an accurate position along a tortuous path and drive the cutting head to rotate at a high speed for drilling.
The specific structure of the cutting head 3 is composed of a fixed connection section 31 positioned on the upper section and a cutting part 32 positioned on the lower section, the diameter of the fixed connection section 31 is larger than that of the cutting part 32, so that a limit step is formed on the outer circumferential surface of the cutting head 3, a limit guide sleeve 6 capable of sliding up and down along the cutting part is sleeved outside the cutting part 32, the outer diameter of the limit guide sleeve 6 is larger than that of the fixed connection section 31 of the cutting head 3, the inner diameter of the limit guide sleeve is smaller than that of the fixed connection section 31 of the cutting head 3, the axial length of the limit guide sleeve 6 is smaller than that of the cutting part 32, and when drilling is carried out, the limit guide sleeve provides drilling guide and limit of the drilling depth for the cutting part, so that; in order to facilitate the positioning operation, an operating handle 5 which is obliquely arranged is fixedly connected to the outer circumferential surface of the limiting guide sleeve 6, and the limiting guide sleeve 6 is placed above the acetabular bone at the bottom in the operation incision through the operating handle 5, so that the operation is convenient;
sleeving an isolation sleeve 4 outside the flexible shaft 2, defining the diameter of the cutting part 32, the diameter of the fixed connecting section 31, the diameter of the flexible shaft 2 and the inner diameter of the isolation sleeve 4 as D1, D2, D3 and D4 respectively, and establishing an acetabulum screw auxiliary fixing hole at the position of a far distance of 5CM in an operative incision in the surgical process, wherein the relationship among the diameters of the isolation sleeve 4, the flexible shaft 2, the fixed connecting section 31 and the cutting part 32 is D4 > D2 > D3 > D1; the drill bit main body drives the cutting head to rotatably cut and drill holes in the isolation sleeve, and important structures such as muscle nerves of a patient cannot be damaged when the drill bit main body rotates at a high speed.
Furthermore, the diameter of the upper section 11 of the handle part 1 is smaller than that of the lower section 12, so that a clamping head structure is formed, and the drill bit main body is conveniently connected with equipment; the lower end face of the handle part 1 and the upper end face of the cutting part 3 are respectively provided with a sunken counter bore, the inner diameter of the counter bore is adapted to the diameter of the flexible shaft 2, the upper end and the lower end of the flexible shaft 2 are respectively installed in the counter bores in a matching way and are fixedly connected through welding, and the installation and the connection are stable and reliable;
further, the axial length of the isolation sleeve 4 is 1/3-1/2 of the axial length of the flexible shaft 2, in the embodiment, the axial length of the isolation sleeve 4 is 1/2 of the axial length of the flexible shaft 2, the axial length of the isolation sleeve 4 is 37.5mm, and the axial length of the flexible shaft 2 is 75 mm; the axial length of the limiting guide sleeve 6 is 1/3-1/2 of the axial length of the cutting part 32, in the embodiment, the axial length of the limiting guide sleeve 6 is 1/2 of the axial length of the cutting part 32, the axial length of the limiting guide sleeve 6 is 11.5mm, and the axial length of the cutting part 32 is 23 mm; an included angle between the operating handle and the axis of the limiting guide sleeve is set to be 30 degrees, so that the operation is convenient, the guiding and limiting are stable, the occupied space is small, and the requirement of small and deep surgical incision space is met;
furthermore, the isolating sleeve and the cutting head are made of medical 316L stainless steel to replace a traditional hard tool steel drill bit, so that the drill bit can be prevented from being broken in an acetabulum bone when drilling in a bending state, and serious consequences that the drill bit cannot be taken out are avoided;
and finally, an anti-slip sleeve 51 is sleeved outside the upper section of the operating handle 5, so that slipping is prevented, the positioning precision is high, and safety and reliability are realized.
Claims (7)
1. A drill bit for a total hip replacement minimally invasive surgery is characterized in that: the flexible shaft is composed of a section of spring, and two ends of the flexible shaft are fixedly connected to the handle and the cutting head respectively through welding; the cutting head consists of a fixed connecting section positioned at the upper section and a cutting part positioned at the lower section, the diameter of the fixed connecting section is larger than that of the cutting part, so that a limiting step is formed on the outer circumferential surface of the cutting head, a limiting guide sleeve capable of sliding up and down along the cutting part is sleeved outside the cutting part, the outer diameter of the limiting guide sleeve is larger than that of the fixed connecting section of the cutting head, the inner diameter of the limiting guide sleeve is smaller than that of the fixed connecting section of the cutting head, the axial length of the limiting guide sleeve is smaller than that of the cutting part, and an operating handle obliquely arranged is fixedly connected; the flexible shaft is externally sleeved with an isolation sleeve capable of sliding up and down along the flexible shaft, and the relationship among the inner diameter of the isolation sleeve, the diameter of the flexible shaft, the diameter of the fixed connecting section and the diameter of the cutting part is that the inner diameter of the isolation sleeve is larger than the diameter of the fixed connecting section, the diameter of the flexible shaft is larger than the diameter of the cutting part; the axial length of the isolation sleeve is less than that of the flexible shaft.
2. The drill bit for total hip replacement minimally invasive surgery according to claim 1, characterized in that: the diameter of the upper section of the handle part is smaller than that of the lower section of the handle part, so that a clamping head is formed; the lower end face of the handle part and the upper end face of the cutting part are respectively provided with a counter bore, the inner diameter of the counter bore is mutually adaptive to the diameter of the flexible shaft, and the upper end and the lower end of the flexible shaft are respectively installed in the counter bores in a matched mode and are fixedly connected through welding.
3. The drill bit for total hip replacement minimally invasive surgery according to claim 1, characterized in that: the axial length of the isolation sleeve is 1/3-1/2 of the axial length of the flexible shaft.
4. The drill bit for total hip replacement minimally invasive surgery according to claim 1, characterized in that: the included angle between the operating handle and the axis of the limiting guide sleeve is 30 degrees.
5. The drill bit for total hip replacement minimally invasive surgery according to claim 1, characterized in that: the isolating sleeve and the cutting head are made of medical 316L stainless steel.
6. The drill bit for total hip replacement minimally invasive surgery according to claim 1, characterized in that: the axial length of the limiting guide sleeve is 1/3-1/2 of the axial length of the cutting part.
7. The drill bit for total hip replacement minimally invasive surgery according to claim 1, characterized in that: the outside cover of operating handle upper segment is equipped with anti-skidding cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921398820.5U CN211381597U (en) | 2019-08-27 | 2019-08-27 | Drill bit for total hip joint replacement minimally invasive surgery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921398820.5U CN211381597U (en) | 2019-08-27 | 2019-08-27 | Drill bit for total hip joint replacement minimally invasive surgery |
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| CN211381597U true CN211381597U (en) | 2020-09-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110537954A (en) * | 2019-08-27 | 2019-12-06 | 谢军 | Drill bit for total hip joint replacement minimally invasive surgery |
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- 2019-08-27 CN CN201921398820.5U patent/CN211381597U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110537954A (en) * | 2019-08-27 | 2019-12-06 | 谢军 | Drill bit for total hip joint replacement minimally invasive surgery |
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