Bone marrow collection device

Abstract

The present invention relates to a bone marrow collection device, and more particularly to a bone marrow collection device that can not only easily and stably move the position of a catheter inserted into a bone marrow cavity when collecting bone marrow, but also collect bone marrow in a state where the position of the catheter is stably fixed after the position of the catheter is moved. The bone marrow collection device for this purpose is characterized by comprising: a hub inserted into the bone marrow cavity; a catheter inserted into the hub and detachably connected to a syringe at one side; and a holder connected to one end of the catheter so that the catheter can move along the length direction.

Description

Technical Field

[0001] The present invention relates to a bone marrow collecting device, and more particularly to a bone marrow collecting device that can easily and stably move the position of a catheter inserted into a bone marrow cavity when collecting bone marrow, and can collect bone marrow in a state where the position of the catheter is stably fixed after the position of the catheter is moved. Background Art

[0002] Bone marrow is a soft tissue that fills the space between bones. It is a tissue that produces blood cells such as red blood cells, white blood cells, and platelets. There are many stem cells in this bone marrow, which continue to divide and develop into blood cells. In addition, this bone marrow also contains stem cells that make up bones. It is also a very important tissue for the immune system because it produces white blood cells that are responsible for the immune system.

[0003] This bone marrow has two types of stem cells. Hematopoietic stem cells are responsible for producing blood cells, constantly dividing into white blood cells, red blood cells, platelets, etc. Mesenchymal stem cells can differentiate into osteoblasts and chondrocytes that form bones.

[0004] The bone marrow may develop malignant tumors or become infected with bacteria, in which case the production of blood cells is reduced. In addition, cancers may develop in the cells that develop into blood cells, which are called leukemias. These diseases can be diagnosed by a bone marrow examination. A bone marrow examination is performed by collecting red bone marrow using a syringe under local anesthesia.

[0005] In cases where the bone marrow is not functioning properly, a bone marrow transplant may be done from another suitable person. The bone marrow can be collected using a syringe, just as in a bone marrow test.

[0006] In this regard, a bone marrow aspirator is disclosed in Korean Patent Publication No. 2004-0007321. The bone marrow aspirator described in the Patent Publication No. 2004-0007321 includes: a handle having a tip surface, a terminal surface, a first and a second side extending between the tip surface and the terminal surface, and having a shape that is easy to grasp; a long through-piece component having a longitudinal axis, a tip, a terminal, a side wall, and one or more holes, the tip having a tip portion, the tip portion being coupled to the handle and having an inlet formed therein, the terminal having a smooth outer surface and a solid terminal through-point, the side wall being substantially formed in a cylindrical shape and forming an inner lumen, the inner lumen extending from the inlet to a position near the terminal through-point, the one or more holes being formed in the side wall and communicating with the inner lumen and being located near the terminal through-point. The tip of the long through-member overlaps with the longitudinal axis of the terminal portion of the long through-member and can be butted against the inlet of the tip of the long through-member while the grip handle is operated to position the terminal portion of the long through-member.

[0007] However, conventional bone marrow collectors, including the bone marrow aspirator disclosed in the aforementioned Patent Publication No. 2004-0007321, have the limitation that only a small amount of bone marrow can be collected through a small hole located near the through tip of a long through member inserted into the bone marrow cavity during bone marrow collection. That is, the amount of bone marrow aspirated through the small hole formed in the through member during the bone marrow collection operation is very small, about 1 cc, so in order to collect a larger amount of bone marrow, the bone marrow collector needs to be moved to multiple locations for collection. Such a process of moving the bone marrow collector is not easy, so the operator needs to invest a lot of time and effort in the bone marrow collection operation, and it also brings great pain and burden to the patient.

[0008] Therefore, it is urgent to improve this problem. Summary of the invention

[0009] (Problem to be solved)

[0010] The technical problem to be solved by the present invention is to provide a bone marrow collecting device that can easily move the position of a catheter inserted into a bone marrow cavity when collecting bone marrow.

[0011] In addition, a bone marrow collecting device is provided which can stably operate when the position of a catheter is moved.

[0012] At the same time, a bone marrow collection device is provided, which can collect bone marrow in a state where the position of the catheter is stably fixed after the catheter position is moved.

[0013] (Methods of solving the problem)

[0014] The bone marrow collection device of the present invention for solving the above-mentioned technical problems comprises: a hub inserted into the bone marrow cavity; a catheter inserted into the hub and detachably connected to a syringe on one side; and a fixer connected to one end of the catheter so that the catheter can move along the length direction.

[0015] At this time, the hub has a support rod for fixing the position of the fixture, and a support groove for inserting and fixing the fixture may be formed on the support rod.

[0016] At this time, a plurality of the supporting grooves may be formed along the moving direction of the catheter.

[0017] At this time, the support groove includes a first support groove and a second support groove, the first support groove is formed on one side of the support rod, and the second support groove is formed on the other side of the support rod; the first support groove and the second support groove can be formed at different positions starting from the bottom of the hub.

[0018] At this time, the first supporting groove and the second supporting groove may have different intervals from each other.

[0019] At this time, a mounting portion may be provided to enable the support rod to be separated from the hub.

[0020] At this time, the mounting portion may include: an insertion member formed at the support rod; and a guide member formed at the hub to insert and fix the insertion member.

[0021] At this time, the guide part and the insertion part are respectively formed on one side and the other side of the hub and the support rod; the insertion part and the guide part formed on one side may have different heights from the insertion part and the guide part formed on the other side.

[0022] At this time, the fixator includes an outer shell and an inner shell, the outer shell is connected to the hub, and the inner shell is connected to one end of the catheter; the inner shell is arranged inside the outer shell and can move along the length direction of the outer shell.

[0023] At this time, a first fastening portion fastened to the inner shell is formed on the outer shell, and a second fastening portion fastened to the first fastening portion may be formed on the inner shell.

[0024] At this time, a plurality of clamping platforms are formed on the first fastening portion along the length direction of the external shell; and a locking protrusion that moves along the clamping platforms may be formed on the second fastening portion.

[0025] At this time, a stop surface may be formed on the stop table, and the stop surface is inclined to face the inner side of the outer shell in the radial direction.

[0026] At this time, the stop surface may include: a first stop surface that is inclined along a direction of leading out of the inner shell; and a second stop surface that is inclined along a direction of leading into the inner shell.

[0027] At this time, the inclination angle of the second stop surface may be greater than the inclination angle of the first stop surface.

[0028] At this time, the locking protrusion may include: a first elastic component that applies elastic force to make the locking protrusion face the radial outer side of the outer shell; and a fixing frame that fixes the first elastic component.

[0029] At this time, a second elastic member may be provided between the outer shell and the inner shell, and the second elastic member applies elastic force in a direction to be introduced into the inner shell.

[0030] At this time, a support portion is provided on one side of the outer housing, the support portion supports one end of the second elastic member, and the locking protrusion can support the other end of the second elastic member.

[0031] At this time, the support portion may have a coupling component to be installed on or removed from the external housing.

[0032] At this time, a first threaded component may be formed on the first fastening portion along the inner circumferential surface of the outer shell, and a second threaded component corresponding to the first threaded component may be formed on the second fastening portion along the outer circumferential surface of the inner shell.

[0033] At this time, a second elastic member may be provided between the outer shell and the inner shell, and the second elastic member applies elastic force in a direction to be introduced into the inner shell.

[0034] At this time, a support portion for supporting one end of the second elastic member is provided on one side of the outer housing, and the second threaded member may be configured to support the other end of the second elastic member.

[0035] At this time, the support portion may have a coupling component so as to be able to be installed on or removed from the external housing.

[0036] (Effects of the Invention)

[0037] The bone marrow collection device of the present invention having the above structure has a fixer to move the position of the catheter inserted into the bone marrow cavity when collecting bone marrow, and has a support rod in the hub to fix the position of the fixer, so that bone marrow can be collected in a stably fixed state after the catheter moves to an accurate position.

[0038] In addition, the fixture is composed of an outer shell and an inner shell, and the position of the catheter is moved by the inner shell moving inside the outer shell in the length direction of the outer shell, so the position of the catheter is easily moved, thereby having the effect of improving the convenience of the bone marrow collection operation.

[0039] In addition, a fastening portion is formed to fasten the outer shell and the inner shell to each other so that the operation can be stabilized when the position of the catheter is moved, thereby having the effect of alleviating the pain of the patient during the bone marrow collection process.

[0040] At the same time, after the position of the catheter is moved, the positions of the outer housing and the inner housing are stably fixed by the elastic force of the second elastic member, thereby achieving an effect of stabilizing the bone marrow collection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a cross-sectional view of a bone marrow collection device according to an embodiment of the present invention.

[0042] Figure 2 and Figure 3 As Figure 1 The cross-sectional view of the Ⅰ-Ⅰ portion is a diagram showing various embodiments of the support rod.

[0043] Figure 4 It is a cross-sectional view of a bone marrow collection device according to another embodiment of the present invention.

[0044] Figure 5 and Figure 6 As Figure 4 The cross-sectional view of the II-II portion is a diagram showing various embodiments of the mounting portion.

[0045] Figure 7 It is a cross-sectional view of a bone marrow harvesting device according to another embodiment of the present invention.

[0046] Figure 8 The present invention is a cross-sectional view sequentially showing the process of collecting bone marrow using a bone marrow collecting device according to another embodiment of the present invention.

[0047] Fig. 9 is to expand Figure 7 The drawings in part A of FIG. 1 are diagrams showing bone marrow collection devices according to various embodiments.

[0048] Fig.10 This is a cross-sectional view showing a bone marrow harvesting device according to another embodiment of the present invention.

[0049] Fig.11 and Fig.12 This is a cross-sectional view showing a bone marrow harvesting device according to another embodiment of the present invention. DETAILED DESCRIPTION

[0050] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those with ordinary knowledge in the technical field to which the present invention belongs can easily implement the present invention. The present invention can be implemented in various forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted in the accompanying drawings, and the same reference numerals are given to the same or similar components throughout the specification.

[0051] In this specification, the terms "including" or "having" should be understood as the existence of the features, numbers, steps, actions, components, parts or combinations thereof recorded in the specification, and do not exclude in advance the possibility of the existence or increase of one or more other features or numbers, steps, actions, components, parts or combinations thereof. In addition, when a part of a layer, film, region, plate, etc. is located "on" another part, this includes not only the case where it is "directly" located "on" another part, but also the case where other parts exist in the middle. On the contrary, when a part of a layer, film, region, plate, etc. is located "under" another part, this includes not only the case where it is "directly" located "under" another part, but also the case where other parts exist in the middle.

[0052] Figure 1 is a cross-sectional view of a bone marrow collection device according to an embodiment of the present invention; Figure 2 and Figure 3 As Figure 1 The cross-sectional view of the Ⅰ-Ⅰ portion is a diagram showing various embodiments of the support rod; Figure 4 is a cross-sectional view of a bone marrow collection device according to another embodiment of the present invention; Figure 5 and Figure 6 As Figure 4 The sectional view of the II-II portion is a diagram showing various embodiments of the mounting portion; Figure 7 is a cross-sectional view of a bone marrow collection device according to another embodiment of the present invention; Figure 8 is a cross-sectional view sequentially showing a process of collecting bone marrow using a bone marrow collection device according to another embodiment of the present invention; Fig. 9 is to expand Figure 7 Part A of the drawings is a diagram showing a bone marrow collection device according to various embodiments; Fig.10 is a cross-sectional view showing a bone marrow collection device according to another embodiment of the present invention; Fig.11 and Fig.12 This is a cross-sectional view showing a bone marrow harvesting device according to another embodiment of the present invention.

[0053] like Figure 1As shown, a bone marrow collection device according to an embodiment of the present invention comprises: a hub 10, which is inserted into the bone marrow cavity; a catheter 30, which is inserted into the hub 10 and detachably connected to a syringe 20 at one side; and a fixture 40, which is connected to one end of the catheter 30 so that the catheter 30 can move along the length direction.

[0054] The hub 10 is made of a solid material and is inserted and arranged first during the bone marrow collection operation. After the hub 10 is inserted and arranged, the catheter 30 is inserted. This catheter 30 is made of a soft material such as polypropylene, and can be freely deformed during the bone marrow collection operation. At the same time, in order to guide the catheter 30 to the bone marrow collection position, another guide member (not shown) such as a flexible introducer can be used. The guide member penetrates the hub 10 in a state of being inserted into the inside of the catheter 30, and guides the catheter 30 to the bone marrow collection position. When the catheter 30 reaches the bone marrow collection position, the guide member is removed, and the syringe 20 for collecting bone marrow is connected to the catheter 30. This catheter 30 may have a head 31 for connecting the syringe 20.

[0055] At the same time, a holder 40 is connected to one end of the catheter 30, and the holder 40 is configured to allow the catheter 30 to move in the longitudinal direction when collecting bone marrow. That is, the catheter 30 reaches the bone marrow collection position in the state of being inserted into the hub 10, and if the syringe 20 is connected to the catheter 30, the piston of the syringe 20 is pulled out to collect bone marrow. If a predetermined amount of bone marrow is collected, the hub 10 is in a fixed position and only the catheter 30 is led out. At this time, the syringe 20 moves together with the head 31 of the catheter 30. In addition, if a predetermined amount of bone marrow is also collected at the newly moved position, the catheter 30 and the syringe 20 are repeatedly led out and bone marrow is collected at a new position.

[0056] At this time, if Figure 2 As shown, the hub 10 has a support rod 11 for fixing the position of the holder 40, and the support rod 11 may be formed with support grooves 11a and 11b for inserting and fixing the holder 40. That is, the operator performs the bone marrow collection operation in a state where the holder 40 is stably inserted in the support grooves 11a and 11b.

[0057] A plurality of the support grooves 11a and 11b are formed along the moving direction of the catheter 30, so after a predetermined amount of bone marrow is collected, the fixator 40 is moved to another adjacent support groove 11a and 11b, and the bone marrow collection operation is continued after the fixator 40 is inserted and fixed.

[0058] That is, the fixator 40 is provided to move the position of the catheter 30 inserted into the bone marrow cavity when collecting bone marrow, and the hub 10 is provided with a support rod 11 to fix the position of the fixator 40, so that bone marrow can be collected in a stably fixed state after the catheter 30 is moved to an accurate position.

[0059] like Figure 3 As shown, the support grooves 11a, 11b include a first support groove 11a and a second support groove 11b, wherein the first support groove 11a is formed on one side of the support rod 11, and the second support groove 11b is formed on the other side of the support rod 11, and the first support groove 11a and the second support groove 11b can be formed at different positions starting from the bottom of the hub 10.

[0060] That is, the position of collecting bone marrow according to the patient may be different, and accordingly, the first support groove 11a and the second support groove 11b are formed on one side and the other side of the support rod 11, respectively, so that the catheter 30 can also accurately move to the corresponding position when the bone marrow collection position is different and the fixture 40 can be effectively fixed in this state, and the first support groove 11a and the second support groove 11b are respectively formed at different positions starting from the bottom of the hub 10. When the position below the hub 10 is called the base, the first support groove 11a is formed at a position spaced d1 from the base, and the second support groove 11b is formed at a position spaced d2 from the base.

[0061] In addition, the first support groove 11a and the second support groove 11b can be configured to have different intervals from each other. That is, the interval of the first support groove 11a is formed as △d1, and the interval of the second support groove 11b is formed as △d2, so that the first support groove 11a and the second support groove 11b are formed differently. With such a configuration, the operator can collect bone marrow while moving the catheter 30 at different intervals according to the patient, and further use the first support groove 11a and the second support groove 11b in combination, so that bone marrow can be stably collected at more different positions.

[0062] Or, if Figure 4 As shown, the support rod 11 can also be separated from the hub 10. That is, there are a plurality of support rods 11 with support grooves 11a and 11b formed at various intervals, and the operator installs the support rods 11 on the hub 10 according to the patient to collect bone marrow.

[0063] For this reason, Figure 5 As shown, the support rod 11 and the hub 10 may be provided with mounting portions 10a, 11c, which may include: an inserting component 11c formed on the support rod 11; and a guide component 10a formed on the hub 10 to insert and fix the inserting component 11c.

[0064] That is, a space is formed between the lower surface of the guide member 10 a formed on the hub 10 and the upper surface of the hub 10 , and the insertion member 11 c of the support rod 11 is slidably inserted and fixed in the space.

[0065] At this time, if Figure 5 As shown, when support grooves 11a and 11b are formed on one side of the support rod 11, the above-mentioned insertion component 11c is preferably formed on the other side of the support rod 11. This is because through such a structure, when force is applied to insert the fixture 40 into the support grooves 11a and 11b, the state of the insertion component 11c inserted into the guide component 10a can be stably maintained.

[0066] Furthermore, if Figure 6 As shown, the guide member 10a and the insertion member 11c may be formed on one side and the other side of the hub 10 and the support rod 11, respectively. In this way, the fixture 40 can be stably fixed regardless of the direction in which the fixture 40 is inserted into the support grooves 11a, 11b.

[0067] In addition, the insertion component 11c and the guide component 10a formed on one side of the hub 10 and the support rod 11 may have different heights from the insertion component 11c and the guide component 10a formed on the other side of the hub 10 and the support rod 11. That is, the height of the insertion component 11c on one side is formed to be h1, and the height of the insertion component 11c on the other side is formed to be h2. In addition, the height of the spacing space formed by the guide component 10a on one side and the guide component 10a on the other side is also formed accordingly. With such a configuration, when the operator installs the support rod 11, it is possible to prevent the erroneous assembly of the state in which the directions of one side and the other side are inverted, and even if the operator does not pay special attention, the support rod 11 can be accurately installed due to this structural feature.

[0068] like Figure 7 As shown, the fixture 40 includes an outer shell 100 and an inner shell 200, wherein the outer shell 100 is connected to the hub 10 to be fixed in position, and the inner shell 200 is connected to one end of the catheter 30 and can move along the length direction Lo, Li of the outer shell 100. The inner shell 200 is arranged inside the outer shell 100, and if the inner shell 200 moves along the length direction Lo, Li of the outer shell 100, the catheter 30 connected to the inner shell 200 also moves together.

[0069] In this way, a fixer 40 is provided to move the position of the catheter 30 inserted into the bone marrow cavity. The fixer 40 is further composed of an external shell 100 and an internal shell 200. The position of the catheter 30 is moved by the internal shell 200 in the length directions Lo and Li of the external shell 100 inside the external shell 100. Therefore, the position of the catheter 30 is easily moved, thereby having the effect of improving the convenience of the bone marrow collection operation.

[0070] That is, Figure 8 As shown in (a), the catheter 30 moves along the introduction direction Li while being inserted into the hub 10 to reach the bone marrow collection position. If the syringe 20 is connected to the catheter 30, the piston of the syringe 20 is pulled out to collect the bone marrow. If a predetermined amount of bone marrow is collected, Figure 8 As shown in (b), the hub 10 is fixed in position and only the catheter 30 moves along the delivery direction Lo. At this time, the syringe 20 moves together with the head 31 of the catheter 30. In addition, if a predetermined amount of bone marrow is also collected at the newly moved position, as shown in FIG. Figure 8 (c) shows that only the catheter 30 and the syringe 20 are moved and the bone marrow is collected at a new position.

[0071] The outer shell 100 and the inner shell 200 are configured to be relatively movable along the length direction of the outer shell 100 , and for this purpose, a first fastening portion 110 fastening the inner shell 200 is formed in the outer shell 100 , and a second fastening portion 210 fastened to the first fastening portion 110 is formed in the inner shell 200 .

[0072] In this way, a fastening portion is formed to fasten the outer housing and the inner housing to each other, so that the action of moving the position of the catheter can be stably performed, thereby having the effect of alleviating the pain of the patient during the bone marrow collection process.

[0073] At this time, if Fig. 9 As shown in (a), a plurality of clamping platforms 111 are formed on the first fastening portion 110 along the length directions Lo and Li of the external housing 100, and a locking protrusion 211 moving along the clamping platform 111 is formed on the second fastening portion 210. A clamping surface 112 is formed on the clamping platform 111, and the clamping surface 112 is formed with an inclination angle a to face the inner side of the radius direction r of the external housing 100.

[0074] That is, if the inner housing 200 moves in the lead-out direction Lo, the locking protrusion 211 integrally fixed to the inner housing 200 also moves in the same direction, and in this process the locking protrusion 211 moves along the locking surface 112 formed on the clamping table 111. At this time, as described above, the locking surface 112 is inclined to face the inner side of the radius direction r of the outer housing 100, so the locking protrusion 211 is elastically deformed in the process of moving along the locking surface 112, and when it reaches the step surface 114 where the locking surface 112 is not formed, the locking protrusion 211 is elastically restored. For this reason, the locking protrusion 211 is preferably made of an elastically deformable material.

[0075] As described above, the operator can stably move the internal shell 200 by elastically deforming the locking protrusion 211 while moving along the locking surface 112, and then the locking protrusion 211 reaches the step surface 114 and recovers elastically. Moreover, the operator can feel the degree of movement of the internal shell 200 by hand, thereby improving the convenience of bone marrow collection.

[0076] At the same time, the locking protrusion 211 is configured to be supported by the step surface 114 of the clamping table 111, and the inner housing 200 no longer moves in the introduction direction Li, so that the bone marrow can be effectively collected.

[0077] When the bone marrow collection device is initially inserted, the internal shell 200 needs to be inserted into the external shell 100 and moved in the introduction direction Li. During the process of introducing the internal shell 200, the locking protrusion 211 can be supported by the step surface 114 of the card table 111. However, if a force greater than the elastic force of the locking protrusion 211 is applied, the internal shell 200 can be effectively introduced.

[0078] Or, if Fig. 9 As shown in (b), the stop surface 112 may include a first stop surface 112a and a second stop surface 112b, wherein the first stop surface 112a is inclined along the direction Lo of exporting the internal shell 200, and the second stop surface 112b is inclined along the direction Li of introducing the internal shell 200.

[0079] That is, during the process of leading out the inner shell 200, the locking protrusion 211 moves along the first locking surface 112a while elastically deforming, and then elastically recovers when the locking protrusion 211 reaches the second locking surface 112b. Fig. 9 (a) shows the inclination of the step surface 114 of the card table 111. That is, assuming that the inclination of the step surface 114 of the card table 111 is 90 degrees, the inclination of the second stop surface 112b is less than 90 degrees.

[0080] If so constructed, the locking protrusion 211 repeatedly elastically deforms and elastically recovers during the process of exporting the internal shell 200, thereby allowing the internal shell 200 to be stably exported. When the bone marrow collection device is initially inserted, the locking protrusion 211 also moves while elastically deforming along the second locking surface 112b during the process of introducing the internal shell 200, so that the internal shell 200 can be effectively introduced with a small force.

[0081] However, the inclination of the second stop surface 112b is preferably formed to have an angle that can effectively support the stop protrusion 211 during the process of leading out the inner shell 200 when collecting bone marrow to prevent the stop protrusion 211 from moving again in the introduction direction.

[0082] In addition, the inclination angle a2 of the second stop surface 112b is preferably formed to be greater than the inclination angle a1 of the first stop surface 112a. With such a configuration, when the inner housing 200 is led out, the stop protrusion 211 can be effectively elastically restored while reaching the second stop surface 112b after being effectively elastically deformed along the first stop surface 112a.

[0083] like Fig. 9 As shown in (a), the locking protrusion 211 can be formed of a single elastic material, or as Fig. 9 As shown in (b), it can also be constructed to include a first elastic component 211a and a fixing frame 211b, wherein the first elastic component 211a applies elastic force to the outside in the radial direction r of the external shell 100, and the fixing frame 211b fixes the first elastic component 211a to prevent it from detaching.

[0084] The first elastic component 211a can use an elastic component such as a leaf spring; with such a structure, the operator can stably move the internal shell 200 by repeatedly elastically deforming and restoring the elasticity of the first elastic component 211a. Not only that, the operator can more accurately feel the degree of movement of the internal shell 200 by hand, thereby improving the convenience of bone marrow collection, and even if the elastic deformation and elastic recovery are repeated during the movement of the internal shell 100, the elastic force can be effectively guaranteed.

[0085] At this time, a second elastic member 120 may be provided between the outer housing 100 and the inner housing 200 , and the second elastic member 120 applies elastic force in a direction introduced into the inner housing 200 .

[0086] like Fig.10 As shown, when the locking protrusion 211 is supported by the step surface 114 of the clamping platform 111, the locking protrusion 211 and the locking surface 112 of the clamping platform 111 are spaced a predetermined distance apart. This is to prevent the locking protrusion 211 from contacting the locking surface 112 during elastic recovery, thereby allowing the operator to have a clear feeling.

[0087] However, since the locking protrusion 211 and the locking surface 112 are spaced apart from each other, the inner shell 200 can be additionally led out until the moment when the locking protrusion 211 contacts the locking surface 112. If bone marrow is collected in this state, the accurate bone marrow collection position cannot be maintained.

[0088] Thus, if Fig.10 As shown, if the second elastic member 120 applies elastic force to the inner shell 200 in the introduction direction Li of the inner shell 200, it is possible to prevent the inner shell 200 from being additionally led out after the locking protrusion 211 is elastically restored. That is, the elastic force of the second elastic member 120 is used to stably fix the positions of the outer shell 100 and the inner shell 200, thereby achieving the effect of stabilizing the bone marrow collection operation.

[0089] To this end, a support portion 130 for supporting one end of the second elastic member 120 is provided on one side of the outer housing 100 , and the locking protrusion 211 may be configured to support the other end of the second elastic member 120 .

[0090] Meanwhile, the support portion 130 may have a coupling member 131 so as to be mounted or disassembled from the outer housing 100. With such a configuration, the operator can adjust the elastic force of the second elastic member 120, such as setting a second elastic member 120 with different elastic coefficients or setting a plurality of second elastic members 120, and in the case where the second elastic member 120 is damaged or contaminated, the second elastic member 120 can be separated for replacement or cleaning and then reset.

[0091] like Fig.11 As shown, a first thread component 113 may be formed on the first fastening portion 110 along the inner circumference of the outer shell 100 , and a second thread component 212 corresponding to the first thread component 113 may be formed on the second fastening portion 210 along the outer circumference of the inner shell 200 .

[0092] That is, the inner housing 200 can be introduced or introduced by rotating the inner housing 200 , so the position of the catheter 30 can be easily moved, and the outer housing 100 and the inner housing 200 are screwed together, so the position of the catheter 30 can be stably fixed.

[0093] At this time, if Fig.12 As shown, a second elastic member 120 may be provided between the outer housing 100 and the inner housing 200 , and the second elastic member 120 applies elastic force in a direction introduced into the inner housing 200 .

[0094] If the second elastic member 120 is provided as described above, the inner housing 100 can be prevented from being arbitrarily led out. At this time, it is preferable to provide a stopper (not shown) to prevent the inner housing 100 from being arbitrarily introduced due to the elastic force of the second elastic member 120.

[0095] A support portion 130 for supporting one end of the second elastic member 120 is provided on one side of the outer housing 100 , and the second threaded member 212 may be configured to support the other end of the second elastic member 120 .

[0096] Meanwhile, the support portion 130 may be provided with a coupling member 131 so as to be mounted or disassembled from the outer housing 100. With such a configuration, the operator can adjust the elastic force of the second elastic member 120, such as by setting a second elastic member 120 with different elastic coefficients or by setting a plurality of second elastic members 120, and when the second elastic member 120 is damaged or contaminated, the second elastic member 120 can be separated for replacement or cleaning and then reset.

[0097] An embodiment of the present invention has been described, but the concept of the present invention is not limited to the embodiment presented in this specification. Technical personnel in the relevant field who understand the concept of the present invention can easily propose other embodiments within the same scope of the concept by adding, changing, deleting, adding, etc. components, and this is also included in the scope of the concept of the present invention.

Claims

1. A bone marrow collection device, It is characterized in that include: A hub, for insertion into the intramedullary cavity; a catheter, which is inserted into the interior of the hub and detachably connected to a syringe at one side; and A holder connected to one end of the catheter so that the catheter can move along the length direction and having a user gripping portion extending along the transverse direction, The hub has a support rod for fixing the position of the holder, the support rod is formed with a support groove, and the user gripping portion provided in the holder is inserted and fixed in the support groove while rotating around the axis of the hub. Wherein, a plurality of the support grooves are formed along the moving direction of the conduit, The user gripping portion includes a first user gripping portion disposed on one side of the holder and a second user gripping portion disposed on the other side of the holder, Wherein, the support groove includes a first support groove and a second support groove, the first support groove is formed on one side of the support rod, the first user gripping part is inserted and fixed in the first support groove, the second support groove is formed on the other side of the support rod, the second user gripping part is inserted and fixed in the second support groove, and the first support groove and the second support groove are formed at different positions starting from the bottom of the hub.

2. The bone marrow collection device according to claim 1, It is characterized in that The first supporting groove and the second supporting groove have different intervals from each other.

3. The bone marrow collection device according to claim 1, It is characterized in that A mounting portion is provided to enable the support rod to be separated from the hub.

4. The bone marrow collection device according to claim 3, It is characterized in that The mounting portion includes an inserting member formed on the supporting rod and a guiding member formed on the hub to insert and fix the inserting member.

5. The bone marrow collection device according to claim 4, It is characterized in that The guide member and the insertion member are formed on one side and the other side of the hub and the support rod, respectively; The insertion member and the guide member formed on one side have different heights from those of the insertion member and the guide member formed on the other side.

6. A bone marrow collection device, It is characterized in that include: A hub, for insertion into the intramedullary cavity; a catheter, which is inserted into the interior of the hub and detachably connected to a syringe at one side; and A fixture is connected to one end of the catheter so that the catheter can move along the length direction. The fixture comprises an outer shell and an inner shell, wherein the outer shell is connected to the hub, the inner shell is connected to one end of the catheter, the inner shell is arranged inside the outer shell, and can move along the length direction of the outer shell. The outer shell has a first fastening portion for fastening the inner shell, and the first fastening portion has a plurality of clamping platforms arranged along the length direction of the outer shell. The inner shell is provided with a second fastening portion fastened to the first fastening portion. The second fastening portion has a locking protrusion that moves along the clamping platform. A stop surface is formed on the card platform, and the stop surface has an inclination angle toward the inner side of the radial direction of the outer shell. The stop surface includes a first stop surface and a second stop surface, the first stop surface is inclined along the direction of leading out of the inner shell, and the second stop surface is inclined along the direction of leading into the inner shell. Wherein, the inclination of the second stop surface is greater than the inclination of the first stop surface and is less than 90°.

7. The bone marrow collection device according to claim 6, It is characterized in that A second elastic member is provided between the outer shell and the inner shell, and the second elastic member applies elastic force in a direction introduced into the inner shell.

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