JP3856507B2 - Guided IVH puncture syringe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a guided IVH puncture syringe, and in particular, an outer tube serving as a guide for inserting a catheter for taking a high-calorie component into a body through a vein is mounted at an accurate position, angle and depth. It is related with the IVH book puncture syringe with a guide for doing.
[0002]
[Prior art]
Conventionally, in order to directly administer a drug or the like into blood, the drug or the like is directly injected into a vein by a syringe. That is, as shown in FIG. 4, the injection needle 12 is punctured directly into the vein 16, and a drug or the like is injected into the blood 17 through the injection needle 12. FIG. 4 is an explanatory view showing a state of blood vessel injection. At this time, in order to insert the tip of the injection needle 12 substantially into the center of the vein 16, attention must be paid to the three conditions of the position, angle, and depth at which the injection needle 12 is punctured on the skin 15. . That is, of the three positions A, B, and C on the skin 15, the position F is directly above the vein 16, the angle F is an angle at which the injection needle 12 overlaps the vein 16 when viewed from directly above, and the angle E is the injection needle 12. When the length of the needle is taken into consideration, the depth D is as small as possible within the range of the angle at which the vein 16 can be reached.
[0003]
In addition, in order to incorporate a high calorie component into the body, it is performed through a thick vein such as the subclavian vein, the internal jugular vein, and the iliac femoral vein. At this time, a bendable tube called a catheter is inserted into these veins in a length of 20 cm to 70 cm from the tip, and is placed therein. Then, an infusion or the like is connected from the other end of the catheter, and a high-calorie component or the like is sent into the body. However, this catheter is elastic and soft like a blood vessel, and the tip cannot easily be inserted into the blood vessel as it is. Therefore, an IVH permanent puncture syringe 21 as shown in FIG. 5 is used to insert the distal end of the catheter. FIG. 5 is a longitudinal sectional view showing a state in which the mantle tube is separated from the conventional IVH book puncture syringe, and FIG. 6 is a sectional view showing each section of the IVH book puncture syringe of FIG. 5 is a U2-U2 cross section, FIG. 6B is a V2-V2 cross section of FIG. 5, FIG. 6C is a W2-W2 cross section of FIG. 5, and FIG. 6D is X2 of FIG. -X2 cross section, (e) of FIG. 6 is a Y2-Y2 cross section of FIG. IVH is an abbreviation for intravenous hyperalignment, which is central parenteral nutrition.
[0004]
As shown in FIGS. 5 and 6, the IVH permanent puncture syringe 21 includes an injection needle 22, an outer cylinder 23, an inner cylinder 24, and an outer tube 27. The injection needle 22 has a length of about 80 mm and a cross-sectional area of about 9 times the cross-sectional area of the injection needle of a syringe used for a normal arm or the like. The injection needle 22 is obliquely cut at a predetermined angle so that the tip can be easily punctured. The other end of the injection needle 22 is provided with a connecting portion 22a that is detachably connected to the outer cylinder 23. The outer cylinder 23 has a substantially cylindrical shape, one end in the longitudinal direction converges, and a connection portion 23 a that can be fitted to the connection portion 22 a of the injection needle 22 is formed. That is, the injection needle 22 and the outer cylinder 23 are detachably connected through the connection portions 22a and 23a.
[0005]
A flange portion 23b is formed at the other end of the outer cylinder 23 in the longitudinal direction, and the inner cylinder 24 is inserted from the flange portion 23b side. The inner cylinder 24 includes a piston portion 25 and a handle 26. The piston portion 25 has a predetermined thickness and an outer peripheral shape that can be brought into close contact with the inner peripheral surface of the outer cylinder 23, and packing portions 25 a that protrude around the outer peripheral surface are provided at both ends in the thickness direction. Is formed. The packing portion 25a is elastic and plays a role for bringing the outer peripheral surface of the piston portion 25 into tight contact with the inner peripheral surface of the outer cylinder 23 when the piston portion 25 is inserted into the outer cylinder 23. Yes. The handle 26 is a bar that has a substantially cross-shaped cross section and is not easily deformed. A disc-shaped flange portion 26a is formed at one end in the longitudinal direction. The piston 25 is fixed to the other end of the handle 26 at the substantially center of the end in the thickness direction. The piston 25 and the handle 26 constitute an inner cylinder 24.
[0006]
The inner cylinder 24 configured in this manner is inserted from the end of the outer cylinder 23 on the flange portion 23b side from the piston portion 25 side. That is, the IVH permanent puncture syringe 21 has a significantly larger length and cross-sectional area of the injection needle 22 than a syringe used for a normal arm or the like. As shown in FIGS. 5 and 6, the IVH puncture syringe 21 configured as described above covers the outer peripheral surface of the injection needle 22 in a close contact state, and a flexible outer tube 27 that can be bent is provided as the injection needle. 22 is used in advance. The catheter is then inserted into the vein at the tip as shown in FIG. FIG. 7 is an explanatory view showing a state where a catheter is inserted into a vein using a conventional IVH puncture syringe.
[0007]
In order to insert the catheter 28 into the vein, the distal end of the outer tube 27 serving as a guide for inserting the catheter 28 must be inserted into the vein 16. In addition, in order to insert the distal end of the outer tube 27 into the vein 16, the injection needle 22 of the IVH main puncture syringe 21 must be punctured into the vein 16. Further, in order to puncture the vein 16 with the injection needle 22 of the IVH main puncture syringe 21, the puncture position, angle and depth of the IVH main puncture syringe 21 must be determined in advance. In particular, the injection needle 22 of the IVH main puncture syringe 21 has a cross-sectional area that is approximately nine times as large as the cross-sectional area of the injection needle of a normal syringe, and the human body is greatly damaged by puncturing the human body. Therefore, it is necessary to complete the puncturing operation with one puncture.
[0008]
Therefore, first, as shown in FIG. 7A, it is necessary to preliminarily register the puncture position, the angle, and the depth with the syringe 11 having the normal thickness of the injection needle 12. Whether the puncture position, angle, and depth are correct may be determined by applying a negative pressure in advance into the outer cylinder of the syringe 11 to determine whether the blood 17 flows in vigorously. That is, while maintaining the state in which the inner cylinder 14 of the syringe 11 is slightly pulled, the puncture position, the angle and the depth are sequentially changed, and the puncture is repeated a plurality of times, and the blood 17 flows in most vigorously. The optimal puncture position, angle and depth. The puncture with the syringe 11 has a sufficiently small cross-sectional area of the injection needle 12, so that the puncture over a plurality of times hardly damages the human body. When the puncture position, angle and depth are thus determined, the injection needle 12 of the syringe 11 is removed from the skin 15 and the vein 16 as shown in FIG. Subsequently, as shown in FIG. 3C, the IVH permanent puncture syringe 21 having the outer tube 27 attached to the injection needle 22 is punctured at the same angle and depth at the position where the syringe 11 is removed. At this time, similarly to the puncture with the syringe 11, negative pressure is applied to the outer cylinder 23 by slightly pulling the inner cylinder 24 of the IVH main puncture syringe 21. And when blood 17 flows in into the outer cylinder 23, it can confirm that the puncture position, angle, and depth of the injection needle 22 are appropriate. If this state can be confirmed, the injection needle 22 is removed from the skin 15 and the vein 16 as shown in FIG. At this time, only the outer tube 27 previously attached to the outer periphery of the injection needle 22 remains with its tip interposed in the skin 15 and the vein 16. Therefore, as shown in FIG. 5E, when the catheter 28 is inserted into the outer tube 27 and is fed into the vein 16 over about 20 cm to 70 cm from the tip, the exposed portion to the outside of the skin 15 is obtained. Is fixed to the skin 15 by sewing or taping. The outer tube 27 is pulled out from the skin 15 and the vein 16 after the catheter 28 is placed in the vein 16 and is divided into two by pulling the knob portion 27a in the lateral direction as shown in FIG. ,Remove.
[0009]
Thus, conventionally, in order to administer a high calorie component or the like into the blood 17, determination of the puncture position, angle and depth by the normal syringe 11, vein of the outer tube 27 by the IVH main puncture syringe 21 It is necessary to prepare in advance through the three steps of implantation into the vein 16 and insertion of the catheter 28 into the vein 16 using the outer tube 27 as a guide. After these steps are completed, a high calorie component or the like is injected into the vein 16 through the catheter 28.
[0010]
[Problems to be solved by the invention]
However, as described above, the injection needle 12 of the syringe 11 which is a means for determining the position, angle and depth of the injection needle 22 of the IVH main puncture syringe 21 is the injection needle 22 of the IVH main puncture injector 21. Since it is removed from the vein 16 and the skin 15 immediately before puncture, most of the position, angle and depth depend on the doctor's memory, and it is sufficiently reliable unless there is skilled skill. I could not say. Further, the cross-sectional area of the injection needle 22 of the IVH puncture syringe 21 was very large, approximately nine times the cross-sectional area of the injection needle 12 of the syringe 11, and the damage given to the human body was large. In patients with withdrawal symptoms of alcoholism, although a large amount of fluid replacement is necessary, intense intravenous movement causes the vein to break immediately after normal infusion. Therefore, it is desirable to use an IVH catheter. However, even if pain is removed by local anesthesia, body movement is performed. Therefore, in the above method, the IVH puncture syringe 21 is positioned at an accurate position, angle, and depth. It was not enough to puncture.
[0011]
Accordingly, an object of the present invention is to provide a guided IVH puncture syringe that can accurately puncture the puncture position, angle, and depth determined by the syringe without depending on the amount of the eye.
[0013]
[Means for Solving the Problems]
Claim 1 The IVH puncture syringe with a guide according to the present invention has a cylindrical guide tube, a cylindrical tube with a substantially uniform cross section in the middle, an opening at one end converges, a connection portion is formed, and an opening at the other end An open outer cylinder, a cylindrical shape with one sharp end, and a connection portion that can be fitted to the connection portion of the outer cylinder is formed at the other end, Align one end of the guide tube at one end and connect the other end of the guide tube from the other end to the outside In a state of leaving a predetermined space continuously connected to both ends between the outer periphery of the guide tube and The guide tube is inside An intervening and fixed guide needle with a guide tube, a piston portion that is inserted from the other end side of the outer cylinder and slides in an airtight state with the inner surface of the outer cylinder, and a handle that is fixed to the piston portion in a rod shape The longitudinal center of the piston portion and the handle communicate with each other, a sliding hole and a guide hole are formed in each, and the piston portion is inserted into the outer cylinder from the other end of the outer cylinder. When the guide tube is inserted at the top, the protruding portion of the guide tube into the outer tube communicates with the sliding hole and the guide hole and slides in an airtight state, and the outer periphery of the cylindrical injection needle with the guide tube An outer tube that covers at least near one end in a substantially intimate state and is detachable from the outer periphery of the injection needle with a guide tube is provided. Here, the cross-sectional shapes of the injection needle with guide tube, the outer tube, the inner tube, and the guide tube include a circle, but other shapes such as an ellipse and various polygons may be used. In addition, for the purpose of use, the tip of the catheter may be inserted into the vein, but in addition, a high-calorie component may be directly injected into the vein.
[0014]
Therefore, the claims 1's According to the IVH book puncture syringe of the invention, the optimal puncture position, angle and depth to the vein are preliminarily determined in advance by a syringe having a normal thickness needle, and then the normal syringe Remove the other part, leaving only the injection needle, insert the center hole of the injection needle into the guide, insert one end of the rod-shaped guide needle that does not deform easily into the vein, and insert one end of the guide needle into the vein Remove the injection needle while it is still inserted, and further guide the other end of the guide needle from the tip of the injection needle through the inside of the injection needle to the outside of the inner cylinder in a substantially straight line. If the injection needle or the injection needle with a guide tube is punctured into the vein while being inserted, the injection needle or injection needle with the guide tube is guided into the vein at the same angle as the guide needle at the position where the guide needle is inserted.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described. FIG. 1 is a longitudinal sectional view showing a state where an outer tube is separated from a guided IVH puncture syringe according to an embodiment of the present invention, and FIG. 2 is a sectional view showing each cross section of the guided IVH puncture syringe of FIG. 2 (a) is a U1-U1 cross section of FIG. 1, FIG. 2 (b) is a V1-V1 cross section of FIG. 1, FIG. 2 (c) is a W1-W1 cross section of FIG. 2D is a cross section taken along line X1-X1 in FIG. 1, and FIG. 2E is a cross section taken along line Y1-Y1 in FIG.
[0016]
As shown in FIGS. 1 and 2, the guided IVH puncture syringe 1 of this embodiment is entirely composed of a syringe needle 2 with a guide tube, an outer tube 3, an inner tube 4, and an outer tube 7. ing.
[0017]
The guide tube-equipped injection needle 2 has a length of about 80 mm and a cross-sectional area of about 9 times the cross-sectional area of the injection needle of a syringe used for a normal arm or the like. One end is cut obliquely at a predetermined angle so that it can be punctured easily. Moreover, the connection part 2a connected to the outer cylinder 3 so that attachment or detachment is possible is provided in the other end. A guide tube 2b is further inserted through the guide tube-equipped injection needle 2.
[0018]
The guide tube 2b has a hollow needle shape that is substantially the same as that of a normal injection needle. One end of the guide tube 2b is aligned with the puncture side of the injection needle 2 with a guide tube, and the other end is outside the injection needle 2 with a guide tube. It protrudes and is inserted and fixed inside the injection needle 2 with a guide tube. The guide tube 2b has an inner diameter that is substantially the same as the inner diameter of a syringe needle of a normal syringe, and an outer diameter that is large enough to leave a sufficient cross-sectional area for blood to move between the guide tube-equipped injection needle 2 and the inside. It is. That is, a space is formed between the inner peripheral surface of the guide tube-equipped injection needle 2 and the outer periphery of the guide tube 2b so as to be continuously connected from one end to the other end of the guide tube-equipped injection needle 2. The blood can move.
[0019]
The outer tube 3 has a substantially cylindrical shape, and one end in the longitudinal direction converges, and a connection portion 3a that can be fitted to the connection portion 2a of the injection needle 2 with guide tube is formed. That is, the injection needle 2 with guide tube and the outer cylinder 3 are connected through the connection portions 2a and 3a. At this time, the connecting portions 2a and 3a are fixed so as not to be detached by an adhesive or the like, and the injection needle 2 with guide tube and the outer cylinder 3 are integrated. Further, the guide tube 2 b protrudes from the inside of the injection needle 2 with a guide tube to the inside of the outer cylinder 3. A flange portion 3b is formed at the other end of the outer tube 3 in the longitudinal direction, and the inner tube 4 is inserted from the flange portion 3b side.
[0020]
The inner cylinder 4 is composed of a piston portion 5 and a handle 6. The piston portion 5 has a predetermined thickness and an outer peripheral shape that can be brought into close contact with the inner peripheral surface of the outer cylinder 3, and packing portions 5 b that protrude around the outer peripheral surface are provided at both ends in the thickness direction. Is formed. The packing portion 5b is elastic and plays a role for tightly contacting the outer peripheral surface of the piston portion 5 with the inner peripheral surface of the outer tube 3 in an airtight state when the piston portion 5 is inserted into the outer tube 3. Yes. The handle 6 is a rod having a cross shape that is not easily deformed, and has a disk-like flange portion 6a at one end in the longitudinal direction. The piston 6 is connected to the other end of the handle 6 at the approximate center of the end in the thickness direction. The piston 5 and the handle 6 constitute an inner cylinder 4.
[0021]
The inner cylinder 4 configured in this way is inserted from the end of the outer cylinder 3 on the flange portion 3b side from the piston portion 5 side. The piston portion 5 and the handle 6 are respectively provided with a sliding hole 5a and a guide hole 6b that communicate with the center of the inner cylinder 4 in the longitudinal direction. Therefore, the guide tube 2b protruding from the inside of the injection needle with guide tube 2 to the inside of the outer tube 3 is inserted into the sliding hole 5a and the guide hole 6b when the inner tube 4 is inserted into the outer tube 3. It is inserted in communication. In addition, around the sliding hole 5a, packing portions 5c projecting toward the central direction go around and are formed at both ends of the piston portion 5 in the thickness direction. Therefore, airtightness is maintained between the guide tube 2b and the piston portion 5. Further, the inner diameter of the guide hole 6b is larger than the inner diameter of the guide tube 2b, there is almost no resistance, and the presence of the guide tube 2b does not hinder the operation of the inner cylinder 4 at all.
[0022]
That is, the IVH book puncture syringe 1 with the guide according to the present embodiment is obtained by replacing the injection needle 22 with the guide tube-equipped needle 2 having the guide tube 2b therein in the conventional IVH book puncture syringe 21. The inner cylinder 24 is replaced with the inner cylinder 4 provided with a sliding hole 5a and a guide hole 6b that penetrate the center in the longitudinal direction. Further, even if the IVH book puncture syringe 1 with guide is used, if the needle 2 with a guide tube is punctured into a vein in a state where negative pressure is applied to the outer cylinder 3, it is the same as in the case of the IVH book puncture syringe 21. The blood flows into the outer tube 3 through the injection needle 2 with a guide tube. However, since no negative pressure is applied in the guide tube 2b, blood does not move in the guide tube 2b. Further, since the space in the guide tube 2b communicates from the tip of the injection needle 2 with guide tube to the flange portion 6a of the handle 6 and does not obstruct anything, a linear shape having an outer diameter smaller than the inner diameter of the guide tube 2b. If it is a bar, it can be inserted. This is different from the IVH permanent puncture syringe 21.
[0023]
The guided IVH puncture syringe 1 having the above-described configuration covers the outer peripheral surface of the guide tube-equipped injection needle 2 in a substantially intimate state, like the IVH permanent puncture syringe 21, and can be bent and is an elastic mantle tube. 7 is attached to the injection needle 2 with a guide tube in advance.
[0024]
Here, the step of inserting the distal end of the catheter into the vein using the guided IVH puncture syringe 1 of the present embodiment will be described. In order to insert the distal end of the catheter into the vein, it is necessary to insert the distal end of the outer tube 7 serving as a guide into the vein in advance. The outer tube 7 is inserted into the vein at the tip in the procedure shown in FIG. FIG. 3 is an explanatory view showing a manner in which the outer tube of the guided IVH puncture syringe according to the embodiment of the present invention is inserted into the vein at the tip. The process of inserting the catheter into the vein after the distal end of the outer tube 7 is inserted into the vein 16 is the same as in the prior art.
[0025]
First, as shown in FIG. 3A, a puncture position, an angle, and a depth are provisionally determined in advance with a syringe 11 having an injection needle 12 having a normal thickness. Whether the puncture position, angle, and depth are correct is determined by applying a negative pressure in advance into the outer cylinder of the syringe 11 to determine whether the blood 17 flows in vigorously. That is, while maintaining the state in which the inner cylinder 14 of the syringe 11 is slightly pulled, the puncture position, the angle and the depth are sequentially changed, and the puncture is repeated a plurality of times, and the blood 17 flows in most vigorously. The optimal puncture position, angle and depth. The puncture with the syringe 11 has a sufficiently small cross-sectional area of the injection needle 12, so that the puncture over a plurality of times hardly damages the human body.
[0026]
When the puncture position, angle, and depth are determined in this way, as shown in FIG. 5B, the syringe 11 has the other part with the needle 12 remaining inside the skin 15 and the vein 16 as shown in FIG. To leave.
[0027]
Subsequently, as shown in FIG. 2C, the guide needle 8 that is not easily deformed is inserted into the injection needle 12 and inserted until the distal end substantially penetrates the vein 16. Since the outer diameter of the guide needle 8 is smaller than the inner diameter of the injection needle 12, it is easy to insert the guide needle 8 through the injection needle 12. Further, since the outer diameter of the guide needle 8 is smaller than the inner diameter of the injection needle 12, it goes without saying that the skin 15, vein 16 and surrounding tissue are hardly damaged in the same manner as the injection needle 12.
[0028]
Subsequently, when the injection needle 12 is pulled out from the skin 15 and the vein 16 as shown in FIG. 4D, only the guide needle 8 remains in the skin 15 and the vein 16. And the guide needle 8 will show the position and angle which should puncture the IVH book puncture syringe 1 with a guide.
[0029]
In order to puncture the IVH main puncture syringe 1 with guide with the guide needle 8 as a guide into the vein 16, as shown in FIG. 5 (e), the guide tube 2b interposed inside the injection needle 2 with guide tube. The end of the guide needle 8 is inserted into the inside. If the guide tube 2b and the guide needle 8 are moved to the skin 15 while the guide tube 2b and the guide needle 8 are slid as shown in FIG. The IVH permanent puncture syringe 1 is punctured into the vein 16 at an appropriate position and angle. At this time, if the inner cylinder 4 is slightly pulled in advance and a negative pressure is applied to the outer cylinder 3, the blood is vigorously moved when the tip of the injection needle 2 with a guide tube is located near the center of the vein 16. Since 17 flows into the outer cylinder 3, the puncture depth can be easily determined. At the same time, it can be confirmed that the puncture position and angle are appropriate. If this state can be confirmed, the guide tube-equipped injection needle 2 and the guide needle 8 are removed from the skin 15 and the vein 16. At this time, only the outer tube 7 previously attached to the outer periphery of the guide tube-equipped injection needle 2 remains with its tip interposed in the skin 15 and the vein 16.
[0030]
Thereafter, the catheter is attached in the same manner as when the outer tube 27 of the conventional IVH book puncture syringe 21 is used. That is, when the distal end of the catheter is inserted into the outer tube 7 and fed into the vein 16 over approximately 20 cm to 70 cm from the distal end, the exposed portion to the outside of the skin 15 is fixed to the skin 15 by taping or the like. . The outer tube 7 is removed from the skin 15 and the vein 16 after being placed in the vein 16 and divided into two parts by pulling the knob portion 7a in the lateral direction.
[0031]
Thus, the IVH book puncture syringe 1 of this embodiment is a conventional IVH book puncture syringe 21 in which the injection needle 22 is replaced with a guide tube-equipped injection needle 2 having a guide tube 2b therein. The inner cylinder 24 is replaced with the inner cylinder 4 provided with a sliding hole 5a and a guide hole 6b that penetrate the center in the longitudinal direction. That is, the guide needle 8 that can faithfully record the puncture position and angle determined by the normal syringe 11 can be punctured at the optimum puncture position, angle and depth for the guide.
[0032]
Therefore, the IVH book puncture syringe 1 of the present embodiment is preliminarily examined for the optimum puncture position, angle and depth to the vein by the syringe 11 having the normal thickness of the injection needle 12, and subsequently the normal The other part is removed while leaving only the injection needle 12 of the syringe 11, the center hole of the injection needle 12 is inserted into the guide, and one end of the rod-shaped guide needle 8 that is not easily deformed is inserted into the vein 16; The guide needle 8 is pierced into the vein 16 while the other end of the guide needle 8 is inserted into the guide tube 2b while the other end of the guide needle 8 is inserted into the vein 16. For example, since the injection needle 2 with a guide tube is guided into the vein 16 at the same angle as the guide needle 8 at the position where the guide needle 8 is inserted, the syringe 11 having an injection needle 12 having a normal thickness is previously examined. To the vein 16 It can be easily punctured by a single operation in optimal puncturing positions and angles in the guide tube with the injection needle 2 intravenous 16. At this time, if the inner cylinder 4 is drawn in advance and the inside of the outer cylinder 3 is in a negative pressure state, when the tip of the injection needle 2 with a guide tube reaches the optimum depth, the inner cylinder 3 enters the outer cylinder 3. Blood 17 flows in. Thereafter, if the injection needle 2 with a guide tube is removed, only the outer tube 7 leaves the tip in the vein 16 and serves as a guide for inserting the tip of the catheter into the vein 16.
[0033]
In the above description, the cross-sectional shapes of the injection needle 2 with guide tube 2, the outer tube 3, the inner tube 4, and the guide tube 2b are circles, but other shapes such as an ellipse and various polygons may be used. In addition, for the purpose of use, the tip of the catheter may be inserted into the vein 16, but in addition, a high-calorie such as blood 17 directly into the vein 16 by the guided IVH book puncture syringe 1 of this embodiment. Ingredients may be injected.
[0034]
The material of the guide needle 8 may be ceramics, stainless steel, or the like, but is also made of a material that is not easily deformed or damaged for use as a guide when the guided IVH puncture syringe 1 is punctured into a vein. In addition, it may be anything as long as it does not adversely affect the human body.
[0035]
【The invention's effect】
As described above, the claims 1's The IVH book puncture syringe of the invention is preliminarily determined in advance the optimum puncture position, angle and depth to the vein with a syringe having a normal thickness needle, and then the needle of a normal syringe The other part is removed, leaving only the central hole of the injection needle as a guide, and one end of a rod-shaped guide needle that does not deform easily is inserted into the vein. The guide needle is inserted into the vein at one end. Remove the injection needle as it is, and then insert the other end of the guide needle into the guide tube that continues from the tip of the injection needle through the inside of the injection needle to the outside of the inner cylinder. However, if the injection needle or the injection needle with guide tube is punctured into the vein, the injection needle or injection needle with guide tube is guided into the vein at the same angle as the guide needle at the position where the guide needle is inserted. To the vein that was examined with the syringe It can be easily punctured by a single operation to a puncturing position, angle needle or guide tube with the injection needle in the vein. At this time, if the inner cylinder is drawn in advance and the inside of the outer cylinder is in a negative pressure state, the blood enters the outer cylinder when the tip of the injection needle or the injection needle with the guide tube reaches the optimum depth. Flows in. Thereafter, when the injection needle or the injection needle with a guide tube is removed, only the outer tube leaves the distal end in the vein and serves as a guide for inserting the distal end of the catheter into the vein.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a state where an outer tube is separated from a guided IVH puncture syringe according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing each cross section of the guided IVH puncture syringe of FIG. 1;
FIG. 3 is an explanatory view showing a manner in which a mantle tube of a guided IVH puncture syringe according to an embodiment of the present invention is inserted into a vein at the tip.
FIG. 4 is an explanatory diagram showing a state of blood vessel injection.
FIG. 5 is a longitudinal sectional view showing a state in which a mantle tube is separated from a conventional IVH puncture syringe.
6 is a cross-sectional view showing each cross section of the IVH book puncture syringe of FIG. 5. FIG.
FIG. 7 is an explanatory view showing a state where a catheter is inserted through a vein using a conventional IVH book puncture syringe.
[Explanation of symbols]
1 Guided IVH puncture syringe
2 Injection needle with guide tube
2a connection
2b Guide tube
3 outer cylinder
3a connection
3b Flange part
4 inner cylinder
5 Piston part
5a Sliding hole
5b Packing part
5c Packing part
6 patterns
6a Flange
6b Guide hole
7 Mantle tube
7a Knob
8 Guide needle
11 Syringe
12 Injection needle
13 outer cylinder
14 inner cylinder
15 Skin
16 veins
17 Blood

Claims (1)

A cylindrical guide tube,
An outer cylinder having a connection portion in which the opening at one end converges in a cylindrical shape and the opening at the other end is open,
It has a cylindrical shape and one end is sharp, and has a connecting portion that can be fitted to the connecting portion of the outer cylinder at the other end, and aligns one end of the guide tube at one end from the connecting portion (2a) to the guide tube. An injection needle with a guide tube in which the guide tube is fixed to the inside in a state having a predetermined space continuously projecting to both ends between the other end projecting to the outside and the outer peripheral surface of the guide tube;
The piston is inserted through the opening at the other end of the outer cylinder and slides in an airtight manner with the inner surface of the outer cylinder. The piston has a rod-like handle with one end connected to the piston, and the piston is centered in the longitudinal direction. An inner cylinder in which a slide hole and a guide hole are formed so as to communicate with the part and the handle, and the guide tube communicates with the slide hole and the guide hole when the piston portion of the outer cylinder is inserted. When,
A guide-shaped IVH puncture device comprising a tubular outer sheath that covers the outer periphery of the guided injection needle in a substantially close contact state at least in the vicinity of the distal end and is removable from the outer periphery of the guided injection needle. Syringe.

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