JPH05123331A - Ultrasonic contrast puncture needle and method of manufacturing the same - Google Patents

Abstract

(57) [Summary] [Object] To provide a puncture needle for ultrasonic contrast and a method for producing the same, which can be easily produced and whose strength is hardly impaired. [Structure] Outer needle 2 or inner needle 3 of puncture needle 1 for ultrasonic imaging
It is characterized in that minute irregularities 7 or 8 are formed by a blasting process on the surface of a portion close to the cutting edge 4 or 5. The beads used for blasting have a diameter of 50 to 300.
Those having a size of μm, preferably 120 to 180 μm are used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a puncture needle for ultrasonic contrast,
In particular, it relates to an improvement of a puncture needle consisting of an outer needle and an inner needle attached to the outer needle, and a manufacturing method thereof.

[0002]

2. Description of the Related Art As a method for collecting tissue or body fluid from liver, kidney or other internal organs for inspection or diagnosis,
A puncture method in which a puncture needle is inserted into a diagnosis site of a patient is known, and is widely used as a useful examination method for obtaining accurate diagnostic information. However, since this puncture method directly inserts the puncture needle into the patient's body, it causes the patient's pain. Therefore, it is necessary to puncture the desired puncture site accurately in the shortest possible time. Accidental collection of tissue due to misalignment of the puncture direction must be reliably prevented, and it must be confirmed that there are no damaged organs in the puncture path.

In order to accurately puncture a desired site, ultrasonic waves have hitherto been applied to a diagnostic site including an organ to be punctured, and reflected waves from the inside of the body are displayed as a tomographic image or the like on a cathode ray tube. A so-called ultrasonic puncture method is used in which a puncture operation is performed while confirming the positional relationship between the puncture needle and body tissue by observing the image and the puncture state of the puncture needle,
Accurate puncture operation is possible without requiring skill. In order to enable accurate image display of the puncture state of the puncture needle, conventionally, a puncture needle having an ultrasonic reflection mark on its outer surface has been used.

However, in this conventional puncture needle with an ultrasonic reflection mark, the ultrasonic reflection mark is formed from a rough surface or an uneven surface, and the puncture is performed while the puncture mark is in direct contact with the living tissue. However, there is a problem that the living tissue is damaged during the puncture. Therefore, in order to avoid such tissue damage, an ultrasonic wave in which a plurality of ultrasonic reflection marks are formed on the inner cylinder needle inserted in the outer cylinder of the puncture needle or the mandolin inserted in place of the inner cylinder needle A puncture needle for puncture has been proposed (Jitsuko Sho 63-2489).
4 publication).

[0005]

However, in this puncture needle for ultrasonic puncture, the depth of the groove or rough surface as the ultrasonic reflection mark to be formed is larger than the wall thickness of the needle, and therefore the puncture needle is used. In addition to having the problem of impairing the strength of the needle, it was troublesome and difficult to manufacture. The present invention has been made in view of the above problems, and provides an ultrasonic contrasting puncture needle that can be easily manufactured and hardly loses its strength, and a method for manufacturing such an ultrasonic contrasting puncture needle. The purpose is to provide.

[0006]

In order to solve the above-mentioned problems, the present invention provides that fine irregularities are formed by blasting on the surface of a portion of an outer needle or an inner needle of a puncture needle which is close to the cutting edge. The characteristic puncture needle for ultrasound contrast is used. Further, the surface of a portion of the puncture needle which is close to the cutting edge of the outer needle or the inner needle is subjected to a blast treatment using beads having a diameter of 50 to 300 μm to form fine irregularities, and a puncture needle for ultrasonic contrasting is characterized. The manufacturing method of is adopted.

[0007]

According to the above construction, the ultrasonic waves emitted during the ultrasonic puncture method are reliably reflected by the minute irregularities formed in the vicinity of the cutting edge of the ultrasonic imaging puncture needle, and the tomographic image is formed on the cathode ray tube. It is displayed as an image. Since the minute unevenness is formed by the blasting process, the strength of the puncture needle is not substantially impaired and the manufacturing is simple.

[0008]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a sectional view of the essential parts of an embodiment of the present invention, and FIG. 2 is a sectional view of the essential parts of another embodiment. Also, FIG.
4 to FIG. 4 are views for explaining the method for manufacturing the ultrasonic imaging puncture needle of the present invention. As shown in FIGS. 1 and 2, an ultrasonic contrast puncture needle 1 (hereinafter simply referred to as a puncture needle) of the present invention includes an outer needle 2 and an inner needle 3, and a cutting edge 4 of the outer needle 2 or a cutting edge of the inner needle 3. It is characterized in that minute irregularities 7 or 8 are formed by blasting on the surface of the portion close to 5.

The outer needle 2 is a needle composed of a canula 11 having a hollow inner cavity and a hub (not shown) fixed to the proximal end thereof, and the canula 11 is preferably stainless steel (SUS304 is more preferable). ), Etc., on the other hand, the inner needle 3 is a needle consisting of a solid linear needle 12 having a circular cross section and a hub (not shown) fixed to its proximal end. The linear needle is manufactured using the same material as the outer needle. The inner needle 3 is inserted into the inner cavity 6 of the outer needle 2 and is slidable on the inner wall of the outer needle 2, and the outer needle 2 and the inner needle 2 are prevented from damaging or scraping the tissue of the puncture path. The cutting edges 4 and 5 of 3 are formed on the cut surfaces of the same angle. Minute irregularities due to blasting are the outer needle 2
Is formed on the surface of the portion of the inner needle 3 which is close to the blade edge 4 or the surface of the portion of the inner needle 3 which is close to the blade edge 5, and the size of the beads used for the blasting treatment is 50 to 300 μm in diameter, preferably 120 to 180 μm. Therefore, the size of the unevenness is formed to have a depth of approximately 20 to 100 μm.

3 to 4 are for explaining a blasting method. FIG. 3 shows a state in which a canula 11 is set on a holding jig 9 of a blasting machine (not shown), and FIG. 4 is set. The state where the beads 10 are sprayed onto the camera 11 from above and below is shown. The camera 11 is set on the holding jig 9 so that only the portion to be processed is exposed, and the beads 10 are sprayed onto the holding jig 9 from above and below by a blasting machine for a predetermined output and time. The output during blasting is generally 2.0-2.5 kg / cm ² , the processing time is 24-48 seconds, and the size of the beads 10 used is usually 50-diameter.
It is 300 μm, preferably 120 to 180 μm. If the output is less than 2.0 kg / cm ^2, the marks of the beads 10 are hard to be attached, and if the output is more than 2.5 kg / cm ² , the canula 11 may bend. Also, if the size of the beads 10 is too small, the irregularities become too fine, and the contrast power drops, and if too large, it does not affect the machine. Glass beads are usually used as the beads 10.

[Example 1] Canula 80 made of SUS304
0 pieces are prepared, and a blasting machine Pneumatic Blaster (trade name, manufactured by Fuji Manufacturing Co., Ltd., model number SOSG-
5G302-1840), 120 μm beads were blown for 24 seconds at an output of 2.0 kg / cm ² to form irregularities on the surface, but minute irregularities were formed on the surface of all canulas. Did not break or bend. Next, when a puncture needle for ultrasonic contrasting consisting of an outer needle containing this canula and a normal inner needle was manufactured, and the contrast property at the time of puncture and the puncture resistance of 10 test subjects were examined, the contrast property was It was good, and the piercing resistance was almost the same as that of the normal puncture needle.

Example 2 A linear needle 80 made of SUS304
0 pieces were prepared, and using the blasting machine used in Example 1, the output was 2.5 kg / cm ² for 180 seconds, 180 μm.
When the beads of No. 2 were sprayed to form irregularities on the surface, fine irregularities were formed on the surfaces of all the linear needles, but the linear needles were not broken or bent. next,
A puncture needle for ultrasonic contrasting consisting of an inner needle including this linear needle and an ordinary outer needle was manufactured, and the contrast property at the time of puncture and the puncture resistance of 10 test subjects were examined. Met.

[0013]

As is apparent from the above description, by adopting the present invention, the strength thereof is not impaired,
Moreover, the puncture needle for ultrasonic contrast can be manufactured at a lower cost than the conventional one. In addition, it is possible to provide an ultrasonic puncture needle for ultrasound contrast that is inexpensive and has little pain during piercing.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of an essential part of another embodiment of the present invention.

FIG. 3 is a diagram illustrating a method of manufacturing a puncture needle for ultrasonic contrast imaging of the present invention, showing a state in which a canula is set on a holding jig.

FIG. 4 is a diagram illustrating a method for manufacturing a puncture needle for ultrasonic imaging of the present invention, showing a state in which beads are sprayed.

[Explanation of symbols]

 1 Ultrasonic contrast puncture needle 2 Outer needle 3 Inner needle 7, 8 Unevenness 9 Holding jig 10 Bead 11 Canula 12 Linear needle

Claims (3)

[Claims] 1. An ultrasonic contrast puncture needle for performing puncture while observing the puncture state of a puncture needle with an ultrasonic image, by blasting the surface of a portion of the outer needle or inner needle of the puncture needle that is close to the cutting edge. A puncture needle for ultrasonic contrast, which is characterized by having minute irregularities. 2. An ultrasonic imaging method characterized in that the surface of a portion of an outer needle or an inner needle of a puncture needle which is close to the cutting edge is blast-treated with beads having a diameter of 50 to 300 μm to form fine irregularities. For manufacturing a puncture needle for medical use. 3. The method according to claim 2, wherein the beads have a diameter of 120 to 180 μm.