Bone cleaning device

Abstract

The present invention relates to a bone fragment cleaning device, comprising: a storage tube; a negative pressure unit, the negative pressure unit is assembled in the storage tube, and is used to generate negative pressure in the inner cavity of the storage tube; a bone removal structure, the bone removal structure is arranged at the distal end of the storage tube, and the bone removal structure has a conveying channel connected to the inner cavity of the storage tube. When the above-mentioned bone fragment cleaning device is used, the bone removal structure is extended into the implantation space, and by generating negative pressure in the inner cavity of the storage tube, impurities are moved forward along the conveying channel and finally enter the storage tube. Thus, the cleaning work in the implantation space can be completed by entering and exiting the surgical site once.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, and in particular to a bone fragment cleaning device, which is used for cleaning bone tissue generated by an implantation space during an orthopedic operation. Background Art

[0002] In artificial orthopedic surgery, it is often necessary to perform bone cutting, drilling, and expansion of implant space at the surgical site. During this process, the human skeleton will be removed to a certain extent, and a certain amount of soft tissue and cartilage will be produced, which need to be removed before the implant is implanted. The harder osteophytes need to be destroyed again and then removed. This operation requires the use of bone cutters, bone scrapers, bone reamers, blood suction devices, etc. The operation is complicated, and the instruments need to enter and exit the surgical site many times, which can easily damage soft tissue and nerves and affect the effect of the operation. Traditional surgical instruments are mainly used to clean soft tissue and cartilage through bone scrapers. The shape of the bone scraper is similar to that of a rice spoon. If you want to remove soft tissue and cartilage, you need to apply force to one side, which will cause damage to the bones on one side, and the dead corners are not easy to completely clean. Summary of the invention

[0003] Based on this, it is necessary to provide a bone fragment cleaning device to address the problem that traditional surgical instruments cannot clean the bone tissue generated in the implant space and are prone to damage the bones.

[0004] A bone fragment cleaning device, comprising:

[0005] Storage cartridge;

[0006] A negative pressure unit, which is assembled in the storage tube and is used to generate negative pressure in the inner cavity of the storage tube;

[0007] A bone-removing structure is arranged at the distal end of the storage tube and has a delivery channel communicated with the inner cavity of the storage tube.

[0008] When the above-mentioned bone fragment cleaning device is used, the bone removal structure is extended into the implantation space, and negative pressure is generated in the inner cavity of the storage tube, so that impurities move along the conveying channel and finally enter the storage tube. Thus, the implantation space can be cleaned by entering and exiting the surgical site once.

[0009] In one embodiment, the negative pressure unit includes a push rod arranged at the proximal end of the storage tube, the push rod has a sealing portion extending into the inner cavity of the storage tube, and the sealing portion is relatively movably matched with the storage tube to form a negative pressure in the inner cavity of the storage tube.

[0010] In one embodiment, a rotary propulsion structure is provided between the sealing portion and the storage tube, and the rotary propulsion structure is used to convert the linear motion of the propulsion rod into the rotary forward motion of the storage tube;

[0011] The bone fragment cleaning device further comprises a holding sleeve sleeved outside the storage tube, the holding sleeve and the storage tube are relatively rotatably matched, and the distal end of the holding sleeve has an abutment portion;

[0012] A first limiting portion is provided on the storage tube corresponding to the abutting portion, and the first limiting portion is located at a side of the abutting portion close to the bone removal structure.

[0013] In one embodiment, the rotary propulsion structure is a spiral matching structure, a gear rack structure, a crank slider structure or a screw structure.

[0014] In one embodiment, a plurality of balls are disposed between the abutting portion and the first limiting portion, and the plurality of balls are distributed along the circumferential direction of the storage tube and form an annular contact surface.

[0015] In one embodiment, a fixing cover connected to the proximal end of the holding sleeve is further included, and a second limiting portion is provided on the storage tube. The second limiting portion is located on a side of the fixing cover facing away from the holding sleeve, and the second limiting portion abuts against the fixing cover.

[0016] In one embodiment, a plurality of needle rollers are disposed between the holding sleeve and the storage tube, and the plurality of needle rollers are distributed along the circumferential direction of the storage tube.

[0017] In one embodiment, the sealing portion includes a sealing head, which is in sealing contact with the inner wall of the storage tube in the circumferential direction. A third limiting portion is provided on the inner wall of the storage tube, and the third limiting portion is located on a side of the sealing head away from the bone removal structure.

[0018] In one embodiment, the bone removal structure is a spiral conveying part, the proximal end of the spiral conveying part is connected to the distal end of the storage tube, the conveying channel is a spiral groove, and the spiral conveying part has a discharge port connecting the spiral groove and the inner cavity of the storage tube, and the discharge port is an axial hole opened at the proximal end of the spiral conveying part, and the axial hole opens in the spiral groove.

[0019] In one embodiment, the spiral conveying part includes a shaft body, and the outer surface of the shaft body is provided with a spiral blade, and the spiral blade defines the trajectory of the spiral groove.

[0020] In one embodiment, a blade or a drill bit is provided at the distal end of the spiral conveying portion.

[0021] In one embodiment, the bone fragment cleaning device further comprises an electric drive unit, wherein the electric drive unit comprises a linear motion element for performing linear motion, and the linear motion element is connected to the propulsion rod.

[0022] In one embodiment, the bone fragment cleaning device further comprises a motor, and the motor is used to drive the spiral conveying part to rotate.

[0023] In one embodiment, the storage cartridge has a transparent portion, the transparent portion being close to a distal end of the storage cartridge.

[0024] In one embodiment, the negative pressure unit includes a hose, which is arranged outside the storage cylinder, and one end of the hose is connected to the inner cavity of the storage cylinder or the delivery channel, and the other end of the hose is connected to the vacuum suction device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of a bone fragment cleaning device according to an embodiment of the present invention.

[0026] Figure 2 for Figure 1 Schematic diagram of the internal structure of the bone fragment cleaning device.

[0027] Figure 3 It is a schematic diagram of the assembly of the cutter and the storage cylinder in the bone fragment cleaning device according to an embodiment of the present invention.

[0028] Figure 4 for Figure 3 Schematic diagram of the internal structure of the assembly shown.

[0029] Figure 5 for Figure 1 A schematic diagram of the structure of a tool in a bone crushing cleaning device.

[0030] Figure 6 for Figure 1 A schematic diagram of the structure of a push rod in a bone fragment cleaning device.

[0031] The corresponding numbers of the relevant components in the figure are as follows:

[0032] 100, bone fragment cleaning device; 10, storage cylinder; 110, inner cavity; 120, connecting hole; 130, first limiting part; 140, second limiting part; 150, third limiting part; 20, negative pressure unit; 210, pushing rod; 211, sealing part; 2111, sealing head; 212, operating handle; 30, bone removal structure; 310, conveying channel; 320, shaft body; 330, discharge port; 340, spiral blade; 350, drill bit; 360, suction port; 40, rotating pushing structure; 410, convex transmission thread; 420, concave transmission thread; 50, holding sleeve; 510, abutment part; 520, ball; 530, gap, groove; 60, fixing cover. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0039] An embodiment of the present invention provides a bone chip cleaning device 100, which can be used to remove bone tissue generated by surgery in the implant space by entering and exiting the surgical site. The bone chip cleaning device 100 of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. In this application, for ease of understanding, terms such as "proximal" and "distal" are used. These terms refer to the relative orientation, relative position, and direction of components or actions relative to each other from the perspective of a doctor using the medical device. "Proximal" generally refers to the end of the medical device that is close to the operator during normal operation, while "distal" generally refers to the end that is away from the operator.

[0040] like Figure 1 As shown, Figure 1 The structure of the broken bone cleaning device 100 of the embodiment of the present invention is illustrated. The broken bone cleaning device 100 includes a negative pressure structure and a bone removal structure 30, wherein the negative pressure structure has a collection space that can generate negative pressure; the bone removal structure 30 has a delivery channel 310 connected to the collection space. Specifically, the negative pressure structure includes a storage cylinder 10 and a negative pressure unit 20. Figure 2 As shown, Figure 2 The internal structure of the matching portion between the storage cylinder 10 and the negative pressure unit 20 is specifically illustrated.

[0041] like Figure 1 and Figure 2 As shown, the storage cartridge 10 has an inner cavity 110 for collecting bone tissue (including soft tissue, cartilage, and bone fragments produced by surgery). The bone extraction structure 30 is disposed at the distal end of the storage cartridge 10. The bone extraction structure 30 is provided with a delivery channel 310 for transmitting bone tissue, and the delivery channel 310 is communicated with the inner cavity 110 of the storage cartridge 10. The negative pressure unit 20 is assembled to the storage cartridge 10 to generate negative pressure in the inner cavity 110. The negative pressure unit 20 and the storage cartridge 10 together constitute a negative pressure structure, which has a collection space that can form negative pressure, and the collection space is the inner cavity 110 of the storage cartridge 10.

[0042] When the above-mentioned bone fragment cleaning device 100 is used, the bone removal structure 30 is extended into the implantation space, and negative pressure is generated in the inner cavity 110 of the storage tube 10, so that the impurities move along the conveying channel 310 and finally enter the storage tube 10. Thus, the cleaning work in the implantation space can be completed by entering and exiting the surgical site once.

[0043] The negative pressure unit 20 is used to form a negative pressure in the storage cylinder 10. Figure 2 As shown, in some embodiments, the negative pressure unit 20 includes a push rod 210 arranged at the proximal end of the storage tube 10, and the push rod 210 has a sealing portion 211 extending into the inner cavity 110 of the storage tube 10. The sealing portion 211 and the storage tube 10 can cooperate relatively movably to allow negative pressure to be formed in the inner cavity 110 of the storage tube 10.

[0044] like Figure 2 As shown, the distal end of the storage barrel 10 is provided with a connecting hole 120 connecting the inner cavity 110 and the delivery channel 310, the proximal end of the storage barrel 10 is open, and the sealing portion 211 of the push rod 210 is inserted into the storage barrel 10 from the proximal end of the storage barrel 10, and the push rod 210 is also formed with an operating handle 212 located outside the storage barrel 10. The sealing portion 211 is slidably sealed with the inner wall of the storage barrel 10. When the sealing portion 211 and the storage barrel 10 move relative to each other, negative pressure is generated in the inner cavity 110 of the storage barrel 10 and acts on the delivery channel 310. The relative movement of the sealing portion 211 and the storage barrel 10 is not limited, such as: the push rod 210 and the storage barrel 10 make relative linear motion, at which time the two slide and cooperate. It can also be: the push rod 210 and the storage barrel 10 rotate and advance relative to each other, at which time, a rotating propulsion structure 40, such as a spiral matching structure, can be set between the two. When the above-mentioned bone fragment cleaning device 100 is used, the sealing portion 211 and the storage tube 10 are relatively movable, that is, negative pressure is formed in the inner cavity 110 of the storage tube 10, thereby completing the cleaning work in the implantation space.

[0045] Combination Figure 2 , Figure 4 and Figure 6 As shown, in some embodiments, a rotary propulsion structure 40 is provided between the sealing portion 211 and the storage cartridge 10, and the rotary propulsion structure 40 is used to convert the linear motion of the propulsion rod 210 into the rotary motion of the storage cartridge 10. For easy operation, the broken bone cleaning device 100 further includes a holding sleeve 50 sleeved on the outside of the storage cartridge 10, and the holding sleeve 50 and the storage cartridge 10 can be relatively rotatably matched, and the distal end of the holding sleeve 50 has an abutment portion 510. A first limiting portion 130 is provided on the storage cartridge 10 corresponding to the abutment portion 510, and the first limiting portion 130 is located on a side of the abutment portion 510 close to the bone removal structure 30.

[0046] The above-mentioned broken bone cleaning device 100 is used as follows: the operator holds the holding sleeve 50 with one hand and pushes it forward, and holds the operating handle 212 of the pushing rod 210 with the other hand and pulls the pushing rod 210 backward (that is, the pushing rod 210 moves in a direction away from the bone removal structure 30). Under the push of the holding sleeve 50 and the constraint of the rotating pushing structure 40, the storage tube 10 rotates forward. Due to the negative pressure generated in the storage tube 10, impurities enter the storage tube 10 along the conveying channel 310. In other embodiments, the holding sleeve 50 may not be provided, and the storage tube 10 is directly pushed forward by hand, and then the operating handle 212 of the pushing rod 210 is held to pull the pushing rod 210 backward, and the storage tube 10 is pushed forward by hand so that the storage tube 10 rotates forward in the hand.

[0047] In addition, it should be noted that, in addition to manual operation, an electric drive unit can also be provided to drive the propulsion rod 210 to move. The electric drive unit has a linear motion element for linear motion, and the linear motion element is connected to the propulsion rod 210. The operator holds the holding sleeve 50 with one hand and pushes it forward, and the electric drive unit drives the propulsion rod 210 to move backward. In the specific setting, an electric handle can be assembled at the proximal end of the storage tube 10, and a motor is provided in the electric handle. The output shaft of the motor converts the output linear motion through the transmission mechanism to drive the propulsion rod 210 to retreat.

[0048] There are many ways to implement the rotary propulsion structure 40, which are not limited by the embodiments of the present invention. Figure 2 , Figure 4 and Figure 6 As shown, the rotary propulsion structure 40 is specifically a spiral matching structure.

[0049] Specifically, a male transmission thread 410 is provided on the sealing portion 211 of the push rod 210; a female transmission thread 420 is provided on the inner wall of the storage tube 10, and the female transmission thread 420 cooperates with the male transmission thread 410 to form a spiral matching structure. Therefore, when the push rod 210 retreats along a straight line, the storage tube 10 will rotate forward. With the spiral matching structure, it is only necessary to process the male transmission thread 410 and the female transmission thread 420 respectively, which is conducive to realizing rotational propulsion in a narrow space.

[0050] In other embodiments, the rotary propulsion structure 40 may also be a gear rack structure, a crank slider structure or a screw structure, so that the storage tube 10 can be rotated forward when the propulsion rod 210 moves backward in a straight line. If the rotary propulsion structure 40 is a gear rack structure, a rack can be provided on the propulsion rod 210, and a tooth structure arranged along the circumferential direction and cooperating with the rack can be provided on the inner wall of the storage tube 10.

[0051] When the holding sleeve 50 is held and pushed forward, the abutting portion 510 of the holding sleeve 50 axially abuts against the first limiting portion 130 on the storage barrel 10. In order to reduce the influence of the above-mentioned axial abutment on the rotation of the storage barrel 10 and enable the storage barrel 10 to rotate flexibly, on the basis of the above-mentioned embodiment, a plurality of balls 520 are provided between the abutting portion 510 and the first limiting portion 130, and the plurality of balls 520 are distributed along the circumferential direction of the storage barrel 10 and form an annular contact surface.

[0052] In specific configuration, a plurality of ball grooves are provided on the surface of the abutment portion 510 or the first position-limiting portion 130, and a ball 520 that can rotate freely but will not fall out is provided in each ball groove. When the storage cartridge 10 rotates relative to the holding sleeve 50, the storage cartridge 10 rotates on the surface of the ball 520, or the storage cartridge 10 drives the ball 520 to rotate on the surface of the abutment portion 510. The surface of the ball 520 is smooth and has rotational freedom, so the storage cartridge 10 is relatively flexible in rotating relative to the holding sleeve 50.

[0053] like Figure 1 and Figure 2As shown, in order to position the holding sleeve 50, in some embodiments, a fixing cover 60 is provided at the proximal end of the holding sleeve 50. The fixing cover 60 is located at the proximal end of the holding sleeve 50, perpendicular to the axial direction of the holding sleeve 50, and abuts against the storage cartridge 10. A second limiting portion 140 is provided on the storage cartridge 10, and the second limiting portion 140 is located on the side of the fixing cover 60 that is opposite to the holding sleeve 50, and the second limiting portion 140 abuts against the fixing cover 60. Through the above means, the two ends of the holding sleeve 50 can abut against the first limiting portion 130 and the second limiting portion 140 respectively, and the holding sleeve 50 is limited to the left and right in the axial direction of the storage cartridge 10, and will not fall off from the storage cartridge 10. In other embodiments, the second limiting portion 140 and the fixing cover 60 may not be provided, and the holding sleeve 50 can be easily removed from the storage cartridge 10. The fixing cover 60 and the holding sleeve 50 are specifically connected by snap-fit.

[0054] Furthermore, the holding sleeve 50 is sleeved on the outside of the storage barrel 10. In order to enable the storage barrel 10 to rotate flexibly, a plurality of axially extending needle rollers (not shown) are provided between the holding sleeve 50 and the storage barrel 10, and the plurality of needle rollers are distributed along the circumferential direction of the storage barrel 10. Due to the provision of the needle rollers, the friction between the outer wall of the storage barrel 10 and the inner wall of the holding sleeve 50 is small, and the storage barrel 10 can rotate more flexibly.

[0055] In specific configuration, a gap 530 for accommodating the needle roller is provided between the inner wall of the holding sleeve 50 and the outer wall of the storage cartridge 10. In one embodiment, the gap 530 is formed by providing one or more grooves distributed along the circumference of the holding sleeve 50 on the inner wall of the holding sleeve 50.

[0056] The groove opens at the proximal end of the holding sleeve 50, and the needle roller is accommodated in the corresponding groove, and the two ends of the needle roller respectively abut against the wall of the groove and the fixed cover 60. One end of the groove is open to allow the needle roller to be inserted, and the other end of the groove extends to the abutment portion 510. During assembly, the holding sleeve 50 is first sleeved on the storage tube 10, the needle roller is inserted into the groove, and then the fixed cover 60 is assembled to the retaining sleeve. When the needle roller needs to be replaced, the fixed cover 60 is first removed, and then the needle roller is pulled out and a new needle roller is inserted, so that a single or multiple needle rollers can be replaced conveniently. In addition, in the above embodiment, the holding sleeve 50 is sleeved on the storage tube 10 and the needle roller is inserted axially, so the radial installation dimension requirements of the storage tube 10 are relatively low.

[0057] In other embodiments, the gap 530 may also be formed by providing one or more grooves distributed along the circumference of the storage tube 10 on the outer wall of the storage tube 10 .

[0058] In addition, the needle roller can also be installed on the holding sleeve 50 or the storage tube 10 in advance to form a whole with the holding sleeve 50 or the storage tube 10, and then the holding sleeve 50 and the storage tube 10 are assembled.

[0059] In order to prevent the push rod 210 from accidentally disengaging from the storage cartridge 10 when moving backward, Figure 2 As shown, in some embodiments, the sealing portion 211 includes a sealing head 2111, which is in sealing contact with the inner wall of the storage tube 10 in the circumferential direction. A third limiting portion 150 is provided on the inner wall of the storage tube 10. The third limiting portion 150 is located on the side of the sealing head 2111 away from the bone removal structure 30, and is used to abut against the sealing head 2111.

[0060] The sealing head 2111 is used to seal the connection hole 120 at the distal end of the storage cartridge 10, and is in sealing contact with the inner wall of the storage cartridge 10 in the circumferential direction. When the push rod 210 retreats, a negative pressure is generated in the portion of the inner cavity 110 of the storage cartridge 10 located on the left side of the sealing head 2111. The third limiting portion 150 can prevent the sealing head 2111 from retreating excessively, thereby preventing the push rod 210 from coming out of the storage cartridge 10.

[0061] In order to facilitate the installation of the push rod 210 , the sealing head 2111 is configured to be made of a flexible polymer material and can pass over the third limiting portion 150 and enter the left side of the third limiting portion 150 .

[0062] Based on the above embodiments, Figure 2 and Figure 5 As shown, the bone removal structure 30 is specifically configured as a spiral conveying part, wherein the proximal end of the spiral conveying part is connected to the distal end of the storage barrel 10, the conveying channel 310 is a spiral groove provided in the spiral conveying part, and the spiral conveying part has a discharge port 330 connecting the spiral groove and the inner cavity 110 of the storage barrel 10, and the discharge port 330 is an axial hole opened at the proximal end of the spiral conveying part, and the axial hole opens in the spiral groove. That is, from the spiral groove to the discharge port 330, the connecting hole 120, and the inner cavity 110 of the storage barrel 10 is a connected channel.

[0063] like Figure 5 As shown, the spiral conveying part includes a shaft body 320, wherein the outer surface of the shaft body 320 is provided with a spiral blade 340, and the spiral blade 340 is provided with a continuous spiral groove, that is, the trajectory of the spiral groove is defined. The spiral groove is recessed toward the distal end on the spiral blade 340, that is, the bottom of the groove is at the distal end, and the opening is toward the proximal end. Preferably, the discharge port 330 opens on the side of the shaft body 320 and is located in the spiral groove. In this way, the cleaned broken bones and soft tissues can directly enter the connecting hole 120 through the discharge port 330 from the spiral groove, and then enter the inner cavity 110 of the storage tube 10, and the conveying channel is continuous and efficient.

[0064] In the above-mentioned embodiment, the bone fragment cleaning device 100 uses the bone structure 30 as a spiral conveying part. When the storage cylinder 10 rotates and moves forward, the spiral conveying part rotates and wraps the impurities, and then the impurities move along the spiral groove under the action of the negative pressure in the storage cylinder 10 and finally enter the storage cylinder 10. In the above-mentioned process, the impurities are wrapped and then removed by the rotation of the spiral conveying part, thereby having a better cleaning effect.

[0065] In addition, the outer surface of the shaft 320 is provided with a spiral blade 340, and the spiral blade 340 scrapes the soft tissue and cartilage during rotation without applying force to one side, thereby not causing damage to the bones on one side. It can be understood that the major diameter of the spiral blade 340 is consistent with the diameter of the implant space.

[0066] The material of the spiral blade 340 is not limited. In some embodiments, the spiral blade 340 is made of a flexible polymer material, which can wrap and remove larger soft tissues and cartilage as much as possible. In other embodiments, the material of the spiral blade 340 is also a hard material, such as stainless steel, which can remove harder osteophytes.

[0067] Furthermore, a drill bit 350 or a blade is provided at the distal end of the spiral conveying portion. Figure 2 As shown, a drill bit 350 is provided at the distal end of the spiral delivery part; one side surface of the drill bit 350 is connected with the delivery channel 310 to form a suction port 360. The drill bit 350 has a certain puncture effect on the cancellous bone and can remove unstable cancellous bone. When a blade is provided at the distal end of the spiral delivery part, unstable cancellous bone can be scraped off.

[0068] In some embodiments, the sealing portion 211 is slidably matched with the storage tube 10, and at this time, the push rod 210 and the storage tube 10 can move linearly relative to each other. When using the bone fragment cleaning device 100, one hand pushes the storage tube 10 forward, and the other hand pulls the push rod 210 backward, so that negative pressure is formed in the storage tube 10, so that the impurities move along the delivery channel 310 of the bone removal structure 30.

[0069] At this time, the bone structure 30 can still be Figure 5 In the spiral conveying part shown, the conveying channel 310 is a spiral groove. In addition, the conveying channel 310 of the bone removal structure 30 can also be a through hole that axially penetrates the bone removal structure 30, one end of the through hole is connected to the inner cavity 110 of the storage tube 10, and the other end is a suction port. At this time, the suction port is set as a flat opening, and its size in the radial direction of the bone removal structure 30 is larger, and impurities are sucked in at the edge. In the process of the bone removal structure 30 entering the implantation space, there is always a negative pressure in the storage tube 10, so that impurities are sucked into the storage tube 10 from the flat opening in turn.

[0070] In the above-mentioned embodiment, an electric drive unit can also be used to drive the propulsion rod 210 to retreat. The electric drive unit has a linear motion element that performs linear motion. The linear motion element is connected to the propulsion rod 210 and will not be described in detail.

[0071] In the above embodiment, the storage cartridge 10 can rotate or move forward linearly relative to the push rod 210, and a collection space of variable size capable of generating negative pressure is formed between the two. It can be understood that the collection space is a part of the inner cavity 110 of the storage cartridge 10, and when the push rod 210 moves backward, the volume of the collection space increases and negative pressure is generated.

[0072] In some other embodiments, the negative pressure unit 20 includes a hose, which is mounted on the outer wall of the storage tube 10, and one end of the hose is connected to the inner cavity 110 of the storage tube 10. The other end of the hose is used to connect the vacuum pump. In addition, one end of the hose can be directly connected to the delivery channel 310 of the bone removal structure 30. At this time, a motor can also be used to drive the spiral delivery part to rotate.

[0073] In order to facilitate observation of the amount of impurities in the storage cartridge 10 , the storage cartridge 10 of the above embodiments is transparently visualized. Specifically, the storage cartridge 10 may be partially transparent, with a transparent portion disposed near the distal end of the storage cartridge 10 .

[0074] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A bone fragment cleaning device, characterized in that: include: Storage cartridge; A negative pressure unit, which is assembled in the storage tube and is used to generate negative pressure in the inner cavity of the storage tube; A bone-removing structure, which is disposed at the distal end of the storage tube and has a delivery channel communicating with the inner cavity of the storage tube; The bone removal structure is a spiral conveying part, the proximal end of the spiral conveying part is connected to the distal end of the storage tube, the conveying channel is a spiral groove, the spiral conveying part has a discharge port connecting the spiral groove and the inner cavity of the storage tube, the discharge port is an axial hole opened at the proximal end of the spiral conveying part, and the axial hole opens in the spiral groove; the spiral conveying part includes a shaft body, the outer surface of the shaft body is provided with a spiral blade, and the spiral blade defines the trajectory of the spiral groove; The negative pressure unit comprises a push rod disposed at the proximal end of the storage tube, the push rod having a sealing portion extending into the inner cavity of the storage tube, the sealing portion being relatively movably matched with the storage tube so that negative pressure can be formed in the inner cavity of the storage tube; A rotary propulsion structure is provided between the sealing portion and the storage tube, and the rotary propulsion structure is used to convert the linear motion of the propulsion rod into the rotary forward motion of the storage tube; The bone fragment cleaning device further comprises a holding sleeve sleeved outside the storage tube, the holding sleeve and the storage tube are relatively rotatably matched, and the distal end of the holding sleeve has an abutment portion; A first limiting portion is provided on the storage tube corresponding to the abutting portion, and the first limiting portion is located at a side of the abutting portion close to the bone removal structure.

2. The bone fragment cleaning device according to claim 1, characterized in that: The rotary propulsion structure is a spiral matching structure, a gear rack structure or a crank slider structure.

3. The bone fragment cleaning device according to claim 1, characterized in that: A plurality of balls are arranged between the abutting portion and the first limiting portion. The plurality of balls are distributed along the circumferential direction of the storage tube and form an annular contact surface.

4. The bone fragment cleaning device according to claim 1, characterized in that: It also includes a fixing cover connected to the proximal end of the holding sleeve. The storage tube is provided with a second limiting portion, which is located on the side of the fixing cover facing away from the holding sleeve, and the second limiting portion abuts against the fixing cover.

5. The bone fragment cleaning device according to claim 1, characterized in that: A plurality of roller needles are arranged between the holding sleeve and the storage tube, and the plurality of roller needles are distributed along the circumferential direction of the storage tube.

6. The bone fragment cleaning device according to claim 1, characterized in that: The sealing portion comprises a sealing head, which is in sealing contact with the inner wall of the storage tube in the circumferential direction. A third limiting portion is provided on the inner wall of the storage tube, and the third limiting portion is located on a side of the sealing head away from the bone removal structure.

7. The bone fragment cleaning device according to claim 1, characterized in that: A blade or a drill bit is arranged at the distal end of the spiral conveying portion.

8. The bone fragment cleaning device according to claim 1, characterized in that: The bone fragment cleaning device further comprises an electric drive unit, wherein the electric drive unit comprises a linear motion element for linear motion, and the linear motion element is connected to the propulsion rod.

9. The bone fragment cleaning device according to claim 1, characterized in that: The cartridge has a transparent portion proximate a distal end of the cartridge.

Images