JPS6221538B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in biopsy needles for collecting biological tissue.

For example, the conventional Menghini needle for performing a liver tissue biopsy consists of an outer tube, a puncture needle inserted into the tube, and a hollow needle for aspiration biopsy that can be replaced with the needle. There is. Then, after passing the puncture through the abdominal wall with the medium needle inserted,
Remove the above-mentioned needle for puncture, insert a needle for aspiration biopsy in its place, insert a suction syringe into the rear end opening of the needle for aspiration biopsy, and aspirate the liver tissue by puncturing the liver tissue. The liver tissue contained within the tip of the biopsy needle is sucked up and collected.

On the other hand, liver damage after liver tissue collection is
The current practice is to observe it with an endoscope and confirm that there is only a slight amount of bleeding, then leave it alone and wait for it to heal naturally. In other words, after a biopsy of the liver tissue, the liver tissue is simply left alone without any special hemostasis treatment and the hope is that it will self-heal. Therefore, regardless of the size of the wound in the liver tissue, there is always a risk that it will cause bleeding and lead to a large amount of bleeding.

The present invention has been made focusing on the above circumstances,
The purpose is to provide a biopsy needle that is easy to handle, can stop bleeding in a wound after a biopsy, and can ensure safety for the human body.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Reference numeral 1 in FIG. 1 denotes the mantle tube of the Menghini needle, which is made of a metal material, and its outer periphery is covered with an electrically insulating covering material 2. Further, a knob 3 is formed at the proximal end of the mantle tube 1, and a rubber valve 4 is attached to the knob 3 to close the proximal opening. There is.

Inside the mantle tube 1, a puncture needle 5 can be inserted in a detachable manner, and FIG. 1 shows the state in which the puncture needle 5 is inserted. The puncture needle 5 is inserted until the cutting edge 6 on the distal end side slightly protrudes from the distal end of the mantle tube 1. In addition, there is a knob 7 on the proximal end.
is provided.

Furthermore, instead of the puncture needle 5, a solid rod-shaped biopsy needle 8 shown in FIG. 2 or a hemostasis electrode needle 9 shown in FIG. 3 can be inserted into the mantle tube 1. ing. The biopsy needle 8 is made of a hollow tubular body, has a cutting edge 10 at its distal end, and has an opening 11 at its proximal end into which a suction syringe (not shown) is removably fitted. There is. Then, the biopsy needle 8 is inserted into the mantle tube 1, and the cutting edge 1
0 only protrudes from the tip of the mantle tube 1. Furthermore, a thin pestle-shaped stopper 12 is inserted into the biopsy needle 8, and a protrusion 13 formed by bending the middle of the proximal end comes into contact with the inner surface of the opening 11, and the stopper 12 is inserted into the biopsy needle 8. The insertion depth of 12 is regulated. The tip of the stopper 12 is retracted deep into the cutting edge 10 of the biopsy needle 8. That is, when the cutting edge 10 of the biopsy needle 8 punctures the tissue 14, a portion of the tissue 14 can be taken into the tissue 14 until it hits the tip of the stopper 12.

Note that when the hemostatic electrode needle 9 is inserted into the mantle tube 1, its tip protrudes from the mantle tube 1 and is exposed to the outside. Further, a knob portion 15 is provided in the middle of the proximal end portion of the hemostatic electrode needle 9, and a plug connection portion 16 is formed at the endmost portion. This plug connection portion 16 has a fourth
An electric plug 17 as shown in the figure is designed to be able to be electrically connected in a detachable manner. As shown in FIG. 5, this electric plug 17 is connected to a high frequency electric device 19 via a cord 18, and transmits a high frequency current from this high frequency electric device 19 to the hemostasis electrode needle 9. Further, this high frequency electric device 19 is connected to a high frequency return electrode plate 21 via another cord 20.

Next, how to use the above embodiment will be explained.

First, as shown in FIG. 1, the puncture needle 5 is inserted into the mantle tube 1, and the puncture needle 5 is passed through the abdominal wall 22 in this inserted state. After that, leave the mantle tube 1 as it is, remove the puncture needle 5, insert the biopsy needle 8 in its place, and insert the tip of the biopsy needle 8 into the liver tissue 14 as shown in FIG. pierce. A portion of the tissue 14 thus enters the tip of the biopsy needle 8. On the other hand, the opening 1 on the proximal side of the biopsy needle 8
For example, a syringe such as a syringe is connected to 1, and the inside of the biopsy needle 8 is aspirated. As a result, the tissue 14 can be strongly sucked into the tip of the biopsy needle 8 until it hits the tip of the stopper 12 and held. Then, the biopsy needle 8 is pulled out to collect the tissue 14.

Although the tissue 14 can be collected in this manner, a wound 24 remains in the liver 23 after the tissue 14 is collected. Therefore, this time, we attached a hemostatic electrode needle 9 to the mantle tube 1.
and insert its tip into the wound 24. Then, an electric plug 17 is connected to the plug connection portion 16 on the proximal side of the hemostasis electrode needle 9, and connected to a high-frequency electric device 19. Furthermore, a high-frequency return electrode plate 21 is applied to the patient's back. Therefore, the high-frequency electric device 19 is operated to flow a high-frequency current between the hemostasis electrode needle 9 and the high-frequency return electrode plate 21 . This creates a wound 1 where the tip of the hemostasis electrode needle 9 is located.
No. 9 is subjected to electrocoagulation to stop bleeding.

Note that since the outer periphery of the mantle tube 1 is covered with an electrically insulating covering material 2, electrocoagulation is performed only at the tip of the hemostasis electrode needle 9. Therefore, only the wound 19 can be surely stopped from bleeding. Also, unlike when the device is simply left alone, dangers due to bleeding can be prevented and safety can be ensured.

In addition, as an insulating means, only a part of both ends of the hemostasis electrode needle 9 may be left, and the contact surface with a mantle tube may be insulatingly coated. Furthermore, insulation means may be applied to both the mantle tube 1 and the hemostasis electrode needle 9. moreover,
The present invention is applicable not only to Menghini needles but also to other biopsy needles such as Silvermann needles.

As described above, according to the present invention, it is possible to perform hemostasis by coagulating a wound from which tissue has been collected using a hemostasis electrode needle whose tip portion is formed into a solid rod shape using a high-frequency current. Therefore, danger due to bleeding can be prevented and safety can be ensured. In addition, hemostasis treatment is simple and does not require special techniques. In other words, it is easy to handle.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG.
The figure is a side sectional view of a medium biopsy needle, Figure 3 is a side sectional view of a hemostasis electrode needle, and Figure 4 is a side sectional view of an electric plug.
FIG. 5 is an explanatory diagram of the state of use. 1... Mantle tube, 2... Covering material, 5... Medium needle for puncture, 8
... Medium needle for biopsy, 9... Electrode needle for hemostasis.

Claims (1)

[Claims] 1. In a biopsy needle for collecting biological tissue, there is a mantle tube that is electrically insulated from the outer periphery, and a core needle for puncture, a core needle for biopsy, and a needle for biopsy that are removably inserted into the mantle tube. 1. A biopsy needle comprising a hemostatic electrode needle having at least a solid rod-shaped tip portion for electrocoagulating a wound after a biopsy.