JP2001231850A - Medical suction tube utilizing capillary phenomenon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction tube free from surface suction and having high suction efficiency and requiring no operation and cleaning and an instrument having its function. SOLUTION: The medical suction tube utilizing a capillary phenomenon has a multiple structure with an outer cylinder and an inner cylinder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a medical suction tube used in a surgical operation.

[0002]

2. Description of the Related Art Conventional medical suction pipes are all single-walled pipes, often having only a hole at the end of the pipe. In rare cases, a vertically long hole such as a slit is formed next to the pipe. There is something. Similarly, a cylinder having a single structure is incorporated in a hook or tweezers.

[0003]

When a hole is formed only at the tip of the tube, the suction force concentrates, and not only blood and washing physiological saline to be suctioned, but also surrounding tissues and nerves are adsorbed. Would. In pediatric cardiovascular surgery, the blood vessel itself is thin, and in the case of a newborn baby, even a thick blood vessel such as the pulmonary artery closes the entire blood vessel when the suction tube is brought close. In neurosurgery and spinal surgery, careful dissection is performed so as not to damage nerves, but suction is essential to ensure visual field. Attraction of the suction tube to the nerve sometimes causes serious nerve paralysis, and a rubber tube or the like is connected to the tip of the suction tube to avoid nerve damage.

[0004] Even if the shape of the hole of the suction tube is vertically long or the number of holes is plural, as long as the structure is a single cylinder, it only sucks air to reduce the suction force and can satisfy the original suction function. Disappears.

[0005] In the conventional suction tube, it is difficult to control the suction force, and a hole for adjustment is always provided at hand. The surgeon is forced to press his / her finger here and perform an operation such that the tip is sucked if the finger is closed and not sucked if it is open.

Further, the hole at the tip does not always suck only the liquid, and if a blood clot, tissue section, bone piece or the like is sucked, the suction tube is clogged, and the operation must be interrupted. In hernia removal, a plurality of suction tubes must be prepared because suction tissue is frequently adsorbed during the operation, and the clogged suction tubes must be cleaned with a thin wire called mandolin.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a suction pipe having a multi-layer structure of an outer cylinder and an inner cylinder. And the gap between the inner cylinder or the inner cylinder and the inner cylinder is set to be small enough to cause capillary action of blood, or a water-absorbing material is installed between them, and blood is adsorbed from the outer cylinder surface and sucked from the innermost inner cylinder. Structured.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 illustrates a suction tube according to claim 1. Blood adsorbed from the myriad of holes in the outer cylinder 1 reaches the surface of the inner cylinder 2 by capillary action. Innumerable holes are also formed on the surface of the inner cylinder 2, and blood is first introduced here.
Is sucked. The arrival of blood from the outer cylinder 1 to the surface of the inner cylinder 2 is caused by capillary action, and since the number of holes is large, almost no suction force is generated on the surface of the outer cylinder 1. Only blood or physiological saline that comes into contact with the surface of the outer cylinder 1 is sucked. Even when blood is partially in contact with the outer cylinder 1, the blood instantly enters the entire circumference of the gap between the outer cylinder 1 and the inner cylinder 2 due to the capillary phenomenon, so that it is difficult to suck air, and the suction efficiency is high. The outer shape is generally a cylinder, but may be an elliptical cylinder or the like depending on the insertion site. If a metal such as stainless steel or brass is used, the material can be reused. However, since it is expected that it is difficult to clean the details, a polymer material such as polypropylene or PVC may be used and may be disposable. polypropylene,
When PVC, Teflon (registered trademark), polyurethane or the like is processed flexibly and the suction tube is formed, the suction tube can be installed deep in the surgical field, in a gap between organs, or the like, and continuous suction can be performed without performing a suction operation.

FIG. 2 shows an example in which a water-absorbing material 3 is provided between the outer cylinder 1 and the inner cylinder 2 according to the second aspect. When the operative field is narrow and the suction tube itself may be thin, a double structure of the outer tube 1 and the inner tube 2 may be used, but there is a limit to the thickness at which the capillary phenomenon occurs inside. When the suction tube itself is made thicker, if the cylindrical structure is overlapped with triple or quadruple, the capillary phenomenon can be secured, but the cost is high. Therefore, a highly water-absorbing material such as a cellulose sponge is placed between the outer cylinder 1 and the inner cylinder 2 so that the adsorbed blood is removed from the inner cylinder 2.
Can be reached.

FIG. 3 shows a medical hook according to the third aspect. The hook pulls the tissue to prevent a tool such as a knife from coming into contact with the hook or to secure the operator's visual field.
The suction tube 4a may be connected along the handle of the hook, but the same effect can be obtained by forming the suction tube itself according to the first aspect flat and connecting the handle.

FIG. 4 shows a medical tweezer according to a fourth aspect. The suction tube 4b may be connected to one or both of the two plates forming the tweezers, but the suction tube itself according to claim 1 is formed as one or both plates and bonded together to form a tweezer with a suction function. Is also good.

FIG. 5 shows a medical forceps according to a fifth aspect. This forceps is for removing a bone fragment. The suction tube 4c may be connected to the distal end, but the distal end portion may be processed as the suction tube structure to provide an osteotomy forceps with a suction function.

FIG. 6 shows a cylinder into which instruments and scopes are inserted during endoscopic surgery according to claim 6, wherein the suction tube 4d is used.
Shows a trocar with a built-in suction function. The lower part of the trocar is always in contact with the operation field, and if the entire lower part has a suction function, suction can be performed without obstructing the visual field of the operator.

[0014]

The present invention is embodied in the form described above and has the following effects.

By having a multiple structure of the outer cylinder and the inner cylinder,
Adsorption on the outer cylinder surface does not occur. Therefore, only blood to be aspirated and physiological saline for washing are aspirated, and surrounding tissues and nerves are not absorbed. Avoid vascular occlusion in pediatric cardiovascular surgery and nerve paralysis in brain and spine surgery.

[0016] The suction efficiency is high, the operator does not need any manual operation, and the cleaning due to clogging of the tube is not required.

Since there is no surface suction of the outer cylinder, it can be easily attached to instruments related to continuous operation during operation, such as hooks, tweezers, forceps, and trocars. The surgeon does not sharpen nerves for troubles related to suction, and the suction function is installed in the instruments, so that the frequency of use of the original suction tube alone is reduced, leading to a reduction in operation time.

[Brief description of the drawings]

FIG. 1 is a sectional view and an external view of a suction tube.

FIG. 2 is a sectional view of a suction tube in which a water-absorbing material is installed.

FIG. 3 is an external view of a hook connected to a suction tube.

FIG. 4 is an external view of tweezers to which a suction tube is connected.

FIG. 5 is an external view of a forceps to which a suction tube is connected.

FIG. 6 is an external view of a trocar to which a suction tube is connected.

[Explanation of symbols]

 1 outer cylinder 2 inner cylinder 3 water-absorbing material 4a, 4b, 4c, 4d suction pipe

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Claims (6)

[Claims] An infinite number of holes are formed in an outer cylinder and one or a plurality of inner cylinders, and a gap between the outer cylinder and the inner cylinder or between the inner cylinder and the inner cylinder is set to be small enough to cause blood capillary action. A medical suction tube that has a structure that sucks blood from and sucks it from the innermost inner cylinder. 2. The medical suction tube according to claim 1, wherein a gap between the outer cylinder and the inner cylinder or a gap between the inner cylinder and the inner cylinder is fixed, and a water-absorbing material is provided therebetween. 3. A suction tube according to claim 1 or 2, wherein
Medical hook that can pull tissues and nerves while sucking. 4. A suction tube according to claim 1 or 2, wherein
Medical tweezers that can hold tissue while aspirating. 5. A suction tube according to claim 1 or 2, wherein
Medical forceps that can pinch or scrape tissue while aspirating. 6. A trocar which is a tube into which an instrument or a scope is inserted during an endoscopic operation, and which has a suction function by incorporating the suction tube according to claim 1 or 2.