JPH05504697A - biopsy instruments - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] biopsy instruments The present invention relates to biopsy instruments, and more particularly to instruments for collecting specimens from biological tissues. Must be able to be manually moved forward and backward relative to each other when performing inspection procedures. The present invention relates to certain biopsy devices that include a portion that does not have a portion.

A biopsy needle of the type mentioned above is disclosed in U.S. Pat. No. 3,477,423. and this known device is used for percutaneous (percuta) procedures, such as breast biopsy procedures. for human tissue (neous) and direct human tissue is the one most commonly used today. It has a sharp cutting edge at its distal end. The opposite proximal end has a roughly rectangular shape that allows for easy use of the device. A pair of holes to help you hold and manipulate the hub when using it. plastic with opposing laterally projecting wings or flanges; The tube has an elongated tubular portion or cannula secured to the hub of the tube. Inner stud μ・ The obtura!or is received and moved longitudinally within the cannula. Can slide in the direction. The stylet projects from each end of the cannula and The forward or leading end of the stylet is shaped like a sharp, pointed tip; On the other hand, the rear end of the stylus is fixed to a plastic slide. So The sliding body of the cannula prevents relative rotation between the cannula and the stylet. It is equipped with a tongue-like member that extends forward and is integral with the rehab. its tongue shape The object is secured between the two predetermined ends by engagement with opposing abutment proboscises on the cannula hub. Stops are provided to limit forward and rearward movement of the stylet between the two positions.

Adjacent to its tip, the stylet is fully inserted when the cannula is in the posterior end position. The stylet is positioned completely within the cannula and the stylet is moved toward its anterior end position. It has a notch that is exposed when it is scratched.

To perform the tissue biopsy process, the stylet is fully posterior to its posterior end position. The tip of the needle is retracted and the tip of the needle is positioned near the biological tissue to be sampled. inserted into the patient's body. Hold the cannula hub in one hand and slide it in with the other. While holding the moving body, the hub and cannula are then held stationary. While in the The tip of the stylet enters the biological tissue. bib The notch of the let is filled with tissue, and then the sliding body remains stationary. While holding the hub is pushed forward so that the cutting edge of the cannula is assembled. The weave will help fill the stylet's notch, and the stylet will once again fill its notch. Must occupy the rear end position. In this way it is cut inside the cannula, The relative positions of the cannula and stylet are adjusted to collect the captured specimen. The needle must be withdrawn while being maintained.

Known biopsy needles are difficult to use, except in the hands of a fairly dexterous surgeon. must be held with both hands, and the needle must be moved to the required position where the specimen is to be taken. Is one hand placed over the patient to help guide the tip of the dollar? That is a great inconvenience, as it is often desirable.

The present invention aims to avoid the disadvantages of prior art biopsy needles and according to the invention the respective parts that are advanced and retracted relative to each other in performing the biopsy procedure; The first and second sliding members are fixed to the A biopsy instrument is provided, comprising a handle for guiding the member.

The instrument of the present invention is such that the sliding member is moved forward and subsequently cuts and captures the tissue specimen. The handle has the advantage of maintaining a fixed position during this time. The handle is convenient It is shaped like a pistol grip and is held with the fingers and palm of one hand, while the other The thumb of the hand can move the sliding member forward. The sliding member is adjusted to from the handle, i.e. on the same side of the handle or preferably on opposite sides. can also protrude laterally for engagement by the thumb of the hand holding the instrument. Ru. For example, one slide may be moved until the other slide member is sufficiently advanced relative to the handle. Fixing the moving member to the handle ensures that the sliding member is advanced in the correct order. Means may be provided to ensure that.

A better understanding of the invention can be obtained from the following detailed description given in conjunction with the accompanying drawings. It will be.

FIG. 1 is a side view of a biopsy needle manufactured according to the present invention; Figure 2 is a view similar to Figure 1, but partially drawn in cross-section, and Figure 3 shows a biopsy needle. 4 and 5 are views corresponding to FIG. 3 and show the continuation of the biopsy process. The parts are drawn in stages.

The biopsy needle shown in the figure is similar to the prior art biopsy needle described above. They are of the same type. It is nested over the stylet 2 It has a cannula l. Even though the leading end of the stylet has a pointed tip. A cannula, on the other hand, has a sharp cutting edge at its leading end.

The stylet has a notch 3 that forms a specimen collection recess a short distance behind its tip. has.

The biopsy needle is a needle shaped to be conveniently held between the fingers and palm of one hand. A handle 5 having a handle grip 6, a barrel 7 having a rectangular and hollow shape. Equipped with. Received in the barrel for axial sliding are a pair of slides, viz. A first slide 8 and a cannula are firmly fixed to the extending end of the stylet 2. A second slide 9 is firmly fixed to the extending end of the slider 1. barrel 7 The top and side walls of the slider 8.9 are interrupted near the rear end of the barrel, and the slider 8.9 Therefore, the stylet and cannula are moved forward relative to the handle 5. The flaps that face each other and protrude laterally through the opening form an operation button for the operation. 10.11.

The opening of the barrel extends over a longer length in the top wall than in the side wall and covers 1 3 is fixed and closes the front end position of the upper wall opening. The cover 13 is separated. It can be a closed lid or a hinged flap that snaps into place with the barrel. and can securely fix it in the closed position. Stylet and kanyu in advance The slide 8.9 assembled with the barrel is guided into the barrel when the cover is opened. and snapping the cover 13 onto the barrel 7 can be fixed in operable assembly with the handle 5 by.

To use the needle, first the slides 8, 9 are fully retracted as shown in Figures 2 and 3. The camera will be adjusted to the correct position. The leading end of the needle is connected to the specimen or the organism being collected. It is inserted into the patient's body until it abuts the tissue. During this step, The thumb of the hand holding the handle grip 6 conveniently applies pressure in the longitudinal direction of the needle. Placed on the button portion 15 of the handle at the rear end of the barrel to add. stop the thumb moves and makes contact with the flange lO, which is located at the end of the side wall of the barrel. Push the sliding body 8 forward until it comes into contact with a stop located nearby. In this way, the sliding body 8 and the stylet are advanced to their forward end positions as depicted in FIG. It will be done. Then, the stylet's notch 3 is pushed out of the cannula and removed. accepts a portion of the biological tissue of the specimen to be tested; And my thumb is on the handle 5 and it also contacts flange II of the barrel, as seen in Figure 5. Slide until you reach the forward end position determined by the flange abutting against the side wall. Push the moving object 9 forward. The forward movement of the sliding body 9 drives the cannula l forward, As a result, the leading edge cuts away the tissue portion received in notch 3, thus resulting in The specimen is captured within the cannula. Needle to take specimen The sliding body 8.9 is stopped in the forward end position by pulling the pistol grip 6. It is pulled out from the patient.

As shown, the slide 9 is provided with a lip 16 that cooperates with a shoulder 17 on the slide 8. However, the two slides can only be advanced in the correct sequence as described. and to ensure that it is possible. To further facilitate correct operation, the hand three thumb holes formed by the flange IO and flange 11; The tongues are the numbers 1, 2, 3 (or I, IT, ■) or the letters ASBSC, respectively. Marks such as can be added to indicate the correct procedure. In addition, canyule The sliding body 9 attached to is provided on a fixing means (not shown), which fixing means is released by the slide 8 which is moved towards its most extreme position. This prevents the slider from moving in the opposite direction relative to the handle.

From the foregoing, it should be noted that the device of the present invention does not require any special skill or dexterity. It will be appreciated that it can be easily operated with one hand without any hassle.

abstract Transdermal and direct human tissue The biopsy needle for (1 issue) has a handle 5 with a pistol grip 6. Cannibals attached to sliding bodies 8 and 9, respectively, whose movement within the barrel 7 is guided It is equipped with a steel plate 1 and a stylet 2.

This slide is a bar for advancing them in turn with the thumb of the hand holding the instruments. It has an actuating flange 10.11 projecting from the opposite side of the barrel.

Submission of translation of written amendment (Article 184-8 of the Patent Law) June 15, 1992

Claims (16)

[Claims] 1. are slidable relative to each other and can be advanced and retracted when performing a biopsy procedure. a first and a second member 8,9 respectively fixedly secured to each elongated portion 1,2; A biopsy instrument comprising a handle 5 and a first and second member 8,9 directly A biopsy device characterized in that it is held by this handle for linear sliding movement Ingredients. 2. Biopsy instrument according to claim 1, characterized in that the handle (5) comprises a pistol grip (6). 3. The handle 5 comprises a barrel 7, with sliding members 8, 9 received within the barrel. Claim 1 or 2 wherein the barrel is guided for longitudinal sliding movement. Biopsy instruments as described. 4. Biopsy according to any one of claims 1 to 3, wherein the barrel is approximately rectangular in shape. utensils. 5. The barrel 7 has a cover 13 which can be opened and has a sliding member 8 , 9 can be inserted and removed. Ingredients. 6. A biopsy device according to claim 5, wherein the cover (13) has a snap-fit connection with the barrel. Ingredients. 7. The sliding members 8, 9 have respective actuating elements 10, 1 projecting outwardly from the handle. 7. A biopsy instrument according to any one of claims 1 to 6, comprising: 1. 8. Actuating elements 10, 11 project laterally from opposite sides of the handle. The biopsy instrument according to claim 7. 9. The sliding members 8, 9 are arranged next to each other in the barrel and each each having a respective actuating element 10, 11 projecting outwardly through an opening in the side wall. A biopsy instrument according to any one of claims 3 to 6. 10. Stops to limit the forward and backward sliding movement of the barrel on the sliding member A biopsy instrument according to any one of claims 3 to 6 or 9, which forms steps. 11. The barrel has a button part 1 for use when inserting the instrument into the patient's body. 10. The rear end wall of claim 3, further comprising a rear end wall forming a Biopsy instruments as described in section. 12. A stop is provided to prevent the second sliding member 9 from sliding forward in front of the first sliding member 8. 12. A biopsy instrument according to any one of claims 1 to 11, characterized in that it is provided with locking means (16). 13. Stop means are provided on the second sliding member 9 for engaging the first sliding member 8. 13. The biopsy instrument according to claim 12, wherein the biopsy instrument is an abutment body 16. 14. the stop means until the first sliding member has been advanced to the forward end position. A fixing device provided to fix the second sliding member 9 against forward movement. The biopsy instrument according to claim 12. 15. The handle 5, the first sliding member 8 and the second sliding member 9 have markings on them. i.e., a claim indicating the correct operating procedure for operating the instrument when collecting a tissue specimen; 15. The biopsy instrument according to any one of 1 to 14. 16. The portions firmly fixed to the first and second sliding members 8 and 9 are respectively styled. 2 and a cannula 1, and the instrument is a biopsy needle. 5. The biopsy instrument according to any one of 5.