Sleeve-type superfine diameter osteofixation needle

[0082] Example 1

[0083] Such as Figure 1-7D The shown cannula type ultra-fine diameter bone fixation needle 100 includes a booster sleeve 116 and an ultra-fine diameter bone fixation needle 102 built in the booster sleeve. The diameter of the bone fixation needle 102 is 0.3 mm.

[0084] One end of the booster sleeve 116 is provided with an adapter seat 112 connected to the rotor adapter head 124 of the drive motor 122. The bone fixation needle 102 is loaded in the booster sleeve 116, and is rigidly connected by the clamping arm 118 at the distal end of the booster sleeve 116 and the detachable rigid plastic ball 120; the clamping arm 118 and the detachable rigid plastic ball 120 bind the bone The fixed needle 102 and the booster sleeve 116 are rigidly integrated, and are locked to limit the length of the needle tip of the bone fixation needle 102 extending from the booster sleeve 116 to 6mm to ensure that the protruding needle tip has sufficient mechanical strength to meet the requirements of percutaneous electrical The hardness requirements of the drill into the bone.

[0085] The booster sleeve 116 is divided into three main parts: a proximal adapter part, a central sleeve part, and a distal snap arm part. The booster sleeve 116 is not only an easy-to-use vehicle, but also provides strength for the packaged ultra-fine diameter bone fixation needle 102, enabling the surgical operator to electrically drive the ultra-fine diameter bone fixation needle 102 to a hard object (for example, the Example animal bone tissue) without bending or breaking. Such as figure 2 As shown, the adapter 112 at the proximal end of the booster sleeve 116 and the adapter 124 connected to the rotor of the motor are designed in a truncated cone shape, and the adapter 124 and the adapter 112 are connected by plugging and unplugging. During the operation, the ultra-fine diameter bone fixation needle is embedded and coupled with the motor rotor. The operator holds the motor grip 128 and controls the touch switch 126 with the thumb, and it is convenient to use the motor-driven tool to implement the bone fixation needle percutaneous penetration self-tapping drill. bone.

[0086] The cylindrical booster sleeve 116 has an inner diameter slightly larger than the diameter of the root thread 106 on the surface of the protruding needle at the root of the bone fixation needle 102 (for example, the booster sleeve is 22G in this embodiment. It can be based on the size of the bone fixation needle Choose different specifications for diameter). The booster sleeve 116 covers almost 4/5 of the bone fixation needle 102, while leaving a space between the two (can be filled with air). Such as Figure 3A , Figure 5B As shown, the booster sleeve 116 is provided with a snap-on clamping arm 118 at its distal end. Two arms extend forward from the distal end of the booster sleeve to transition to the clamping arm 118, and the extended clamping arm 118 itself forms a protruding clamping arm enclosure outwards and inwards, and the rigid plastic ball 120 is fixed to the clamping arm In the enclosed space formed, see Figure 4A , 4B , 5A, 5B, 5C, 5D.

[0087] The rigid connection device for temporarily binding the bone fixation needle 102 can adopt other structures such as metal ring buckles or screw fasteners in addition to rigid plastic balls 120. The clamping arm 118 and the rigid plastic ball 120 provide a rigid connection that prevents the bone fixation needle 102 from sliding, and can bond the bone fixation needle 102 to the booster sleeve 116 to form a whole. The rigid plastic ball 120 limits the length of the bone fixation needle 102 that only extends outside the booster sleeve 116 and the clamping arm 118 to 6mm (this length can be adjusted according to the diameter of the bone fixation needle and the bone position) to ensure that the bone fixation needle 102 has enough The strength to penetrate bone tissue without bending or breaking.

[0088] The removable rigid plastic ball 120 is formed of a rigid but brittle material (which can be rigid plastic, ceramic, organic glass, photosensitive gel, etc.). After the tip of the bone fixation needle 102 partially penetrates the bone tissue, the rigid plastic ball 120 can be squeezed and cracked by using tools such as angled nose pliers, so that the clamping arm 118 at the end of the booster cannula can be completely opened , The bone fixation needle 102 is disengaged from the booster sleeve 116, and the bone fixation needle 102 is screwed into the bone tissue under the action of the round-handled needle holder pushing and twisting. The clamping arm 118 has a certain extension and then bends into a convex shape to clamp the surrounding rigid plastic ball 120. Its purpose is to: 1. Provide additional free space and recessed areas for tools such as curved nose pliers to facilitate squeezing Press the fixed ball. 2. A certain error range of ceramic or rigid plastic injection and bonding is provided, so that the detachable adhesive material will not enter the cavity of the booster sleeve 116 during injection and bond, and the booster sleeve will not easily detach from the bone fixation needle. 3. The protruding rigid plastic ball 120 can also be used as a stop mark when the bone drill is inserted into the needle to help the operator to measure the penetration distance of the bone fixation needle into the bone.

[0089] The bone fixation needle 102 can be made into various diameters to meet clinical requirements. In this embodiment, a 30G specification is used, but it can be smaller or larger. The needle can be made of stainless steel hardened metal or titanium nickel alloy. Such as Figure 3B with 3C As shown, the bone fixation needle 102 has a smooth outer surface from the tip of the distal tip to the front of the tail thread, which helps to ensure that the needle body enters the bone tissue more easily, while avoiding entanglement with the nearby skin and muscles passed by the puncture. A root thread 106 is provided at the proximal tail of the bone fixation needle, and the root thread protrudes from the surface to keep the bone fixation needle firmly fixed in the bone tissue. Even if the animal has sufficient movement after surgery, it is not easy to loosen.

[0090] Such as Figure 6A , 6B , 7A, 7B, 7C, and 7D, the tip of the bone fixation needle 102 is a tapered asymmetric triangular blade eccentric tip. The eccentric needle tip 104 is composed of two identical large tapered surfaces and a small tapered surface of 1/3 smaller, namely the large tapered surface 104a, the large tapered surface 104b and the small tapered surface 104c of the needle tip, which form Straight edges with sharp angles facing each other. Such multiple unequal flat tapered surfaces form sharp triangular blades with unequal centers and eccentric tips, such as Figure 7D The eccentricity of the needle tip is 70%. The needle tip produces a measurable swing or bounce during each circle of the electric drill bone, which generates a greater impact force and helps the triangular blade edge provide a stronger cutting force every time it rotates , And at the same time reduce frictional overheating by generating more swing gaps.

[0091] After the tip section of the bone fixation needle 102 extending out of the booster sleeve 116 pierces the target bone, remove the rigid connecting device (rigid plastic ball 120) at the distal end of the booster sleeve, remove the booster sleeve 116, and finally hold it with a special round handle. The root thread 106 pushed and pulled by the needle forceps to the tail of the bone fixation needle is screwed into the anchoring bone matrix.

[0092] Example 2

[0093] Such as Figure 8-1 The type II cannula type ultra-fine diameter bone fixation needle shown in 0 includes a type II needle cannula 214 and a built-in type II needle 202. The diameter of type Ⅱ needle 202 is 0.5mm.

[0094] Such as Picture 8 , 9A As shown in 9B, one end of the type II needle sleeve 214 is provided with a type II needle adapter seat 212 connected to the rotor of the driving motor. The type II needle adapter seat is in the shape of a hexagonal prism and matches the type II needle adapter cavity 210 of the cordless motor. Match. The type II needle 202 is loaded in the type II needle sleeve 214 and is rigidly connected by the sleeve tightening thread 216 at the distal end of the type II needle sleeve 214 and the sleeve tightening nut 218.

[0095] Such as Figure 10A , 10B As shown in, 10C and 10D, the distal port of the type II needle cannula 214 is divided into three equal parts and extended as trapezoidal lobes. The three trapezoidal lobes are provided with sleeve tightening threads 216. When the three trapezoidal extension lobes are tightened and squeezed by the casing tightening nut 218 designed with the tapered internal thread 220, the built-in type II needle 202 is fixed and locked, which is also as rigid as the embodiment 1 of the present invention. The same effect of the plastic ball. For clinical applications, there are many types of bone fixation needles available (the middle section of the fixation needle can also be provided with raised threads or the whole body can be provided with threads). Such as Figure 9B with Figure 10F As shown, a type II needle tip thread 208 is provided at the tip of the needle body of the bone fixation needle.

[0096] Example 3

[0097] This embodiment is used to explain the use method and process of the sleeve-type superfine-diameter bone fixation needle of the present invention in the external fixation operation of the tibia in mice.

[0098] Such as Figure 11-30 Shown is a schematic diagram of establishing a mouse tibia and femur external fixator model by using the sleeve-type ultra-fine diameter bone fixation needle of the present invention.

[0099] Such as Picture 11 As shown, the mouse is fixed to the orthopedic surgical fixation device 300, and the hind limbs of the mouse are placed in a standard position in front of the animal orthopedic positioning fixture 302, and a positioning needle hole 304 is shown that can be positioned through the anatomical position of the popliteal fossa.

[0100] Such as Picture 12 As shown, the hind limbs of the mouse are positioned on the animal orthopedic fixation device, and the 25G syringe needle is used as the positioning needle 306 through the positioning needle hole 304 through the popliteal anatomy position, and the paw and knee area are elastic Bandage rope 308 is fixed.

[0101] Such as Figure 13 Shown is a mini cordless drive motor 122 equipped with a cannula-type ultra-fine diameter bone fixation needle unit 100.

[0102] Such as Figure 14 As shown, the bone fixation needle is driven into the distal tibia with a mini cordless drive motor. The operator holds the motor grip 128 and controls the touch switch 126 with the thumb, and can conveniently use the drive motor 122 to implement the percutaneous puncture drill into the bone by the bone fixation needle.

[0103] Such as Figure 15 As shown, the cannula-type ultra-fine diameter bone fixation needle 100 that has been penetrated into the distal tibia has been detached from the mini cordless drive motor.

[0104] Such as Figure 16 As shown, the detachable rigid plastic ball 120 has been removed, and the booster sleeve 116 has been partially removed from the bone fixation needle 102.

[0105] Such as Figure 17 As shown, the bone fixation needle 102 detached from the booster sleeve has been inserted into the bone tissue, and the tip of the needle has penetrated the tibia of the mouse, and the root end of the tail of the bone fixation needle reveals the root thread 106.

[0106] Such as Figure 18 As shown, after the special round-handled needle holder is used to push and pull, the root thread 106 of the bone fixation needle has been completely anchored in the bone tissue, and the front part of the bone fixation needle 102 has penetrated the skin.

[0107] Such as Figure 19 As shown, the threaded ends of three consecutive bone fixation pins are in place and anchored to the distal section of the tibia.

[0108] Such as Picture 20 As shown, the threaded ends of the other three bone fixation pins are anchored in place to the proximal section of the tibia.

[0109] Such as Figure 21 As shown, the six bone fixation needles are punctured and anchored in place, and the elastic bandage strapping rope is removed.

[0110] Such as Figure 22 As shown, remove the syringe needle used for popliteal positioning and fixation.

[0111] Such as Figure 23 Shown is the hind limbs of a mouse with six bone fixation pins anchored after the orthopedic fixation device 300 is removed.

[0112] Such as Figure 24 Shown is the position of the hind limb of a mouse with six bone fixation pins anchored with the animal orthopedic fixation device 300 removed after a 90° viewing angle is rotated.

[0113] Such as Figure 25 As shown, the distal ends of the six bone fixation pins protruding out of the skin have been bent and bridged into a frame toward the middle section of the tibia of the mouse using bending forceps to form the basic shape of the tibia external fixator.

[0114] Such as Figure 26 As shown, the light-curable flowable composite 310 has been applied to the bridge-shaped connecting frame formed by six bone fixation needles, and then cured by the LED curing lamp into a rigid external bone fixation frame.

[0115] Such as Figure 27 Shown is a schematic diagram of external fixation of segmental tibial bone defects in mice. Six bone fixation pins penetrate the mouse tibia and anchored in place at the root; the outer segments of the bone fixation pins of the anchors are parallel to each other and bend toward the center of the tibia; to form a six-needle shoulder bridge; the bridge is coated with light-curing flowable composite material Filling; composite material is cured with LED light; 3.5mm segmental defect is removed; bone defect is implanted with artificial material inoculated with cells; a few weeks later, the cured part of the external fixator is close to the cured body and the fixed needle is cut off. Remove; then remove all remaining bone fixation pins.

[0116] Such as Figure 28 Shown is a schematic diagram of a mouse tibial fracture operation using a sleeve-type ultra-fine diameter bone fixation pin rigid external fixator in Example 1 of the present invention. Six needles penetrate the mouse tibia; the outer segments of the three needles at each end are parallel to each other and bend toward the center to form a shoulder bridge; a bone breaker is used to break the tibia; a light-curing flowable composite material is used to coat and fill the bridge; the composite material uses LED lights Curing; after a few weeks, the cured part of the external fixture is cut off the needle and removed; then all remaining pins are removed.

[0117] Such as Figure 29 Shown is a schematic diagram of a mouse tibial fracture operation using a sleeve-type ultra-fine diameter bone fixation pin flexible external fixator in Example 1 of the present invention. Six needles penetrate the mouse tibia; the three distal needles and the three proximal needles are bent toward each other in parallel with the three needles at each end to form two end cluster bridges; then they are each coated with light-curing and flowable The composite material is cured with LED lights; two elastic pins are placed and connected to the two ends and two clusters respectively, and the left and right ends of the cured two ends are respectively connected by light curing flowable composite material; the right elastic pin is used to connect two The right end face of the cluster, but only the proximal end is temporarily cured; the left elastic pin is used to connect the left end faces of the two clusters, but only the distal end is temporarily cured; the two elastic pins should be placed in parallel, as a complete bone fracture Refer to the previous positioning; then use the bone breaker to break the fracture, which makes the two parallel elastic pins relatively shift; re-align the elastic pins to the cemented parallel position before the bone fracture, that is, when returning to the intact bone Phase; then the two unfixed points of the elastic pin clusters at both ends are connected and cured by the composite material; a few weeks later, the cured part of the external fixing frame is cut off and removed; finally, all the remaining pins are pulled out.

[0118] Such as Figure 30 Shown is a schematic diagram of external fixation of segmental bone defect of femur in mice. Six needles penetrate the mouse femur; the outer sections of the anchor needles are parallel to each other and bend toward the center; to form a six-needle bridge; the bridge is filled with light-curable flowable composite material; the composite material is cured with LED light; 3.5mm The segmental defect was removed; the bone defect was implanted with cell-seeded artificial material; a few weeks later, the solidified part of the external fixator was cut off and removed; then all the remaining fixation pins were removed.