JPH0591617U - Bone marrow puncture device - Google Patents

Abstract

(57) [Summary] [Purpose] The bone marrow puncture device main body and the puncture device are separated from each other to make the whole compact to facilitate the storage management and carrying of each item and the repeated collection of bone marrow fluid by exchanging the puncture device. Do many efficiently. [Structure] A rod for pushing out a puncture needle 4 is mounted via a coil spring 5 so as to slide in a puncture device tubular body 2 having a chamber 10 connected to an opening 11 which constitutes a part of a bone marrow puncture device body 1. At the same time, the stopper 3 is attached to the puncture device tube body 2 so as to variably set the height H, while the ball plunger 15 is attached to the puncture device tube body 2 so that its tip portion is projected into the chamber 10. Bone marrow puncture device

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bone marrow puncture device for piercing a puncture needle to collect bone marrow tissue or bone marrow fluid of a human body, an animal or the like.

[0002]

[Prior Art]

 Examples of conventional techniques include a Komiya-type bone marrow puncture device, a JRCS-type bone marrow puncture device, and a University of Tokyo-type bone marrow puncture device. In these conventional techniques, generally, a puncture needle is inserted into a puncture outer tube to integrally form the puncture needle, and the puncture needle is pulled out after puncturing into the bone marrow, and a syringe (syringe tube) is used from the puncture outer tube. Then, the bone marrow fluid was collected by suction.

[0003]

[Problems to be solved by the device]

 When piercing the bone marrow with the puncture outer cylinder and puncture needle that make up the bone marrow puncture device, it is difficult to fit in the hand because the upper part of the hand is pressed with the palm of the hand, and it is easy for the puncture site to move easily and to be reliably and reliably inserted. .. Further, when the puncture outer cylinder and the puncture needle are paired to perform puncture at a large number of places, a corresponding number of bone marrow puncture devices are required and a large number of puncture needles must be prepared in advance. Furthermore, since the puncture needle is long, a long puncture outer tube is inevitably required, resulting in a large dead space, which makes it difficult to suck bone marrow fluid smoothly.

[0004]

[Means for Solving the Problems]

 A movable setting type L-shaped stopper having a puncture needle removing function is attached to a part of the bone marrow puncture tube body which constitutes a part of the bone marrow puncture device, and the rod for pushing out the puncture needle is inserted through a coil spring. A bone marrow puncture device is slidably mounted in an outer cylinder, and a puncture tool composed of a separable puncture needle and a puncture cylinder is loosely fitted and opposed to a tip end portion of the puncture needle pushing rod.

[0005]

[Operation] After the puncture device including the puncture needle and the puncture outer cylinder that are separably loosely fitted is slidably inserted through the opening of the bone marrow puncture device barrel and made to face the tip of the puncture needle pushing rod. By pressing an L-shaped stopper against the body surface and pressing the rod for pushing out the puncture needle against the repulsive force of the coil spring, the needle body of the puncture needle of the puncture tool and the puncture insertion cylinder of the puncture cylinder are Reach the bone marrow. After that, when the pressing force is released, the rod for pushing out the puncture needle returns to its original position by the restoring force of the coil spring. At this time, the puncture needle and the puncture outer cylinder have been inserted. Then, the puncture needle is removed, and the bone marrow fluid is suctioned and collected from the puncture tube using a syringe.

[0006]

【Example】

 Reference numeral 1 denotes a bone marrow puncture device main body, which is mainly composed of a bone marrow puncture device cylinder 2, an L-shaped stopper 3 which is movable and has a puncture needle removing mechanism, and a puncture needle pushing rod 4. A rod 4 for pushing out a puncture needle is slidably fitted in the bone marrow puncture device cylinder 2 through a coil spring 5, and is constantly moved in the arrow A direction by the restoring elasticity of the coil spring 5. It Reference numeral 2A is a handle, and 6 is a part of the stick for pushing out the puncture needle. A guide groove formed along the longitudinal direction is used to insert a setscrew 7 through the barrel 2 of the bone marrow puncture device, and the stick for pushing out the stick It has a function to smoothly move 4 in the vertical direction and to prevent it from coming off. Reference numeral 8 is a knob portion, and 9 is a tip pressing portion.

Reference numeral 10 is a chamber of the bone marrow puncture device tube body 2 and is connected to the opening 11, and a puncture device 12 to be described later is fitted therein. Reference numeral 13 is a set screw for adjusting and fixing the height H of the L-shaped stopper-3, which is screwed to the bone marrow puncture body tube 2 through a longitudinal through hole 14 formed in the stopper-3. There is. P is a scale and serves as a pointer for adjusting the needle depth by changing the position of the stopper-3. Reference numeral 15 is a ball plunger screwed to the bone marrow puncture body 2 through the through hole 14 of the stopper 3, and the ball stopper portion 16 is projected into the chamber 10.

Reference numeral 17 is a through hole formed in the flat plate surface portion 18 of the stopper 3 for making the puncture device 12 come in and out more easily. 19 is a U-shaped notch opening. The puncture device 12 is composed of a puncture needle 20 and a puncture cylinder 21 which are loosely fitted to each other, and the puncture needle 20 is formed of a plastic cap 22 and a metal needle body 23. .. Reference numeral 24 is a needle tip portion, and 25 is a groove portion formed in the cap 22, which reaches the protruding tongue portion 26. The ball stop portion 16 described above is formed so as to be loosely fitted in the groove portion 25, so that the puncture device 12 can be easily inserted into and removed from the chamber 10 of the puncture device cylinder 2.

The above-mentioned puncture cylinder 21 is integrally configured by a plastic cylinder 27 and a metal puncture insertion cylinder 28. When the cap 22 is fitted as shown in FIG. The needle tip portion 24 of the body 23 is formed so as to protrude from the opening portion 29 of the puncture insertion tube 28. Reference numeral 31 is epidermis, 32 is muscle, 33 is cortical bone, 34 is cancellous bone and bone marrow cells, and bone marrow fluid. Reference numeral 35 is a protective cover cylinder.

Next, a usage mode of the product of the present invention will be described. A puncture tool 12 composed of a puncture needle 20 and a puncture tube 21 which are separable is fitted into the chamber 10 through the opening 11 of the puncture device tubular body 2 as shown in FIG. After that, the bone marrow puncture device main body 1 is positioned at the puncture site, the handle 2A is clamped by the index finger and the middle finger of the hand, and the knob 8 is pressed by the palm of the hand, as shown in FIG. Is pressed in the arrow B direction and the tip pressing portion 9 presses the puncture device 12 in the same direction, and the needle tips 24 of the needle bodies 20, 23 of the puncture needle 20 and the puncture insertion tube 28 of the puncture tube 21. Is pierced into the cortical bone 33.

After that, when the pressing force is released, the rod 4 for pushing out the puncture needle is smoothly moved in the original position, that is, in the arrow A direction by being guided by the guide groove 6 and the set screw 7 by the restoring elasticity of the coil spring 5. .. At that time, when the whole bone marrow puncture device main body 1 is lifted, the puncture cylinder 21 remains there while being stuck in the bone marrow 33. After that, when the rod 4 for pushing out the puncture needle is pushed out again in the direction of the arrow B, the ball stop 16 is retracted, and the puncture needle 20 which is pulled out and held this time is punctured in the bone marrow puncture device body 1. It is discharged from the chamber 10 of the container body 2. Therefore, a new puncture device 12 may be used again. Thus, the bone marrow fluid can be collected efficiently by sequentially using the new puncture device 12.

Then, the bone marrow fluid 34 is punctured and inserted by inserting a syringe (syringe barrel) (not shown) into the mouth portion 21A of the puncture tube 21 which is left after being punctured by the bone marrow 33. It is sucked through the opening 29 of the cylinder 28.

[0013]

[Effect of the device]

 As described above, in claim 1 of the present invention, since the bone marrow puncture device main body 1 and the puncture device 12 are separated from each other, the whole is compacted as compared with the conventional one integrally formed. Moreover, it is easy to store and carry each item. In the second aspect, the puncture device 12 can be made short and the volume of the puncture needle 20 can be made smaller than that of the prior art. The dead space of the puncture cylinder 21A can be reduced to smoothly collect the bone marrow fluid. I can go to Su. Further, since the puncture needle 20 is disposable, a new puncture needle 20 can always be used and the sharpness at the time of puncturing a bone is good. Furthermore, since a sterilized puncture needle is used, bone marrow fluid can be repeatedly collected by exchanging the needle. Furthermore, one bone marrow puncture device body 1 can efficiently collect a large number of samples within a short time, which is efficient. According to the third aspect of the present invention, the handle portion fits in the hand better than the prior art, the insertion into the puncture site can be performed accurately and surely, and the stability is excellent, and the sample can be easily collected.

[Brief description of drawings]

FIG. 1 is an overall perspective view of the product of the present invention.

FIG. 2 is a left side view of the same in section.

FIG. 3 is a rear view of the same.

FIG. 4 is a left side view of the same.

FIG. 5 is a bottom view of the same.

FIG. 6 is also an enlarged vertical sectional left side view.

FIG. 7 is an enlarged vertical front view of the puncture device showing a state in which the puncture is made in the bone marrow cavity.

FIG. 8 is an enlarged perspective view of a puncture needle.

[Explanation of sign]

 1 Bone marrow puncture device main body 2 puncture device cylinder 2A handle 3 stopper-4 puncture needle pushing rod 5 coil spring 10 chamber 11 opening 12 puncture device 15 ball plunger-20 puncture needle 21 puncture cylinder 23 needle body 24 needle tip part 28 Puncture insertion tube

Claims (3)

[Scope of utility model registration request] 1. A rod for pushing out a puncture needle 4 through a coil spring 5 so as to slide in a puncture device cylinder 2 having a chamber 10 connected to an opening 11 which constitutes a part of a bone marrow puncture device body 1. And a stopper -3 to variably set the height H on the puncture body cylinder 2, and a ball plunger -1.
5 is attached to the puncture body cylinder 2 and its tip is attached to the chamber 1
Bone marrow puncture device protruding into 0 2. A puncture body 2 having a chamber 10 connected to an opening 11 which constitutes a part of the bone marrow puncture body 1, and sliding inside the puncture body 2 through a coil spring 5. A rod 4 for pushing out a puncture needle, a stopper-3 attached to the puncture device cylinder 2 for variably setting a height H, and a chamber 1 of the puncture device cylinder 2.
Puncturing tool 12 consisting of a ball plunger 15 having a distal end projecting inside 0, and a separable puncture needle 20 and a puncture tube 21 which are stored and held in the chamber 10 via the ball plunger 15. A bone marrow puncture device configured to insert the puncture needle 20 and the puncture cylinder 21 into one body by inserting the puncture needle 20 and the puncture cylinder 21 into one body by pushing the puncture device 12 by the pressing force of the rod 4 for pushing out the puncture needle. 3. A pair of handles 2A attached to the puncture body cylinder 2.
The bone marrow puncture device according to claim 1 or 2, further comprising: