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Journal of Medical Ultrasonics

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1993 - Vol.20

Vol.20 No.03

Technical Note(技術報告)

(0179 - 0183)


Development of a New Needle for Aspiration Biopsy under Ultrasonography

西村 庸夫1, 中西 正1, 波多野 誠1, 浦岡 佳子1, 棟田  三保1, 有馬 祥子1, 吉野  守彦1, 柚木  茂2, 平田  真美3, 平田  康隆4

Nobuo NISHIMURA1, Tadashi NAKANISHI1, Makoto HATANO1, Yoshiko URAOKA1, Miho MUNETA1, Shouko ARIMA1, Morihiko YOSHINO1, Shigeru YUNOKI2, Mami HIRATA3, Yasutaka HIRATA4

1松山市民病院内科, 2松山市民病院外科, 3松山城東病院内科, 4松山城東病院外科

1Department of Internal Medicine, Matsuyama Shimin Hospital, 2Department of Surgery, Matsuyama Shimin Hospital, 3Department of Internal Medicine, Matsuyama Joutou Hospital, 4Department of Surgery, Matsuyama Joutou Hospital

キーワード : New Needle, Aspiration Biopsy, Ultrasonography

We devised a lowcost needle and a method for an aspirating biopsy to sample hepatic tissue in sufficient length and width for safety and security.
The needle for our own device is 15 cm long and devised to reduce the puncture resistance at the tip of the needle, as well as to take up the tissue easily, and the surface of the needles tip is roughened.
In the use of a 14 G Silverman needle, two cases showed a 38°C fever, and one case showed severe pain requiring an analgesic. For the use of a 15 G true cut needle, sometimes the amount of the tissue was insufficient, therefor a double puncture had to be made in 11 cases, and a triple-puncture was made in 3 cases. In the use of 16 G sure cut needle, as well, sometimes no tissue was taken at all, which required a double-puncture in 3 cases. With the use of our own type of needle, practically none of the 67 cases complained of pain, thus a sufficient amount of tissue was obtained from 1 puncture in 66 cases, and only 1 case required a double-puncture. The conventional needles for aspirating biopsy present problems such as tissue damage due to a high aspirating pressure, an insufficient air flow due to the presence of the inner needle resistance, etc. We found that a high negative pressure is required for taking up the tissue into the biopsy needle and cutting it, and that the needle resistance is not necessary when the tip of the needle is inside the liver. Therefore, it is not necessary to use the resistant needle if the negative pressure is released just before pulling the needle out of the liver, which can give only a pulse of a high negative pressure before the time required for the biopsy is up and the image of the needle under the echo was very clear.