JPH06343645A - Incision device - Google Patents

Abstract

PURPOSE: To provide a surgical knife having a retractable blade which is safe without causing surgical gloves to break and which is manipulated simply. CONSTITUTION: It relates to a surgical knife equipped with a blade 22 which can be housed, an elastic vessel 14 ad a slender housing 12 having a blade housing part 32 inside the housing 12. When a pressure is applied to the vessel 14, the blade 22 moves along the axial direction of the housing 12 and jumps out to a position of use. As long as the pressure is applied to the vessel 14, the blade 22 is situated outside the housing 12.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a safe lancing device having a retractable blade, and more particularly to a retractable blade scalpel.

[0002]

2. Description of the Related Art For medical personnel who may care for persons with infectious diseases such as AIDS virus, when considering the risk, surgery for doctors or other nurses to perform their medical procedures is considered. Wearing gloves is mandatory. Surgeons, especially those who cannot avoid contact with the patient's blood, are always at high risk.

Heretofore, retractor blade safe dissection instruments have helped reduce the risk to medical personnel working with surgical blades. Conventional actuators for retractable blade cutting devices include sliding actuation buttons (US Pat. No. 4,320,576), thumb-operated sliding parts (US Pat. 33
7,576 and 4,663,846), rotating barrel (fuselage) (US Pat. No. 4,730,613), mobile collar or shell (US Pat. Nos. 4,393,587 and 4,414,97).
4), and a mechanism for converting a rotational force into an axial force (US Pat. No. 4,757,612).

[0004]

However, such a conventional device has a drawback that it is difficult for a person wearing surgical gloves to operate it by hand. In particular, thumb-operated sliding switches and pen-type actuators carry the additional risk of tearing or puncturing surgical gloves during use.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a retractable blade scalpel or other dissecting instrument that uses a resilient pouch as an actuator, the dissecting device being elastic. It is characterized in that the blade of the knife is pushed out of the safe housing when pressure is applied to the bag.

It is also an object of the present invention to provide a retractable blade scalpel that can be easily manually manipulated by the surgeon without the risk of damaging surgical gloves or other protective clothing.

[0007]

In the incision device according to the present invention, firstly, a housing having a blade accommodating portion and a bag accommodating portion, and a storage position when not in use, which is retracted into the blade accommodating portion. And a blade that can be repeatedly moved between a use position pushed out from the housing, and at least one compression operation that is partially pressed by the bag container and can be operated from the outside of the housing. An elastic bag containing a fluid inside, and a piston located between the blade and the elastic bag, and the piston when the operating surface of the bag is pressed. Is operated to push the blade from the storage position to the use position, and transmission means. Secondly, in the first configuration, the fluid in the elastic container is liquid, and thirdly, in the first configuration, the elastic container is elastic. The bag is characterized in that it has a fold portion that expands when pressure is applied to its operation surface. Fourthly, in the first configuration, the transmission means is further hung on the bag. It is characterized by having spring means for returning the blade to the blade housing in the housing when the pressure is released.

Further, fifthly, a housing having a handle portion and a blade accommodating portion therein, an accommodating position retracted into the blade accommodating portion, and a use position pushed out of the housing from the blade accommodating portion. A blade assembly having a blade mounted for repeatable movement between the blade assembly and the blade assembly; and an operation surface disposed in the housing adjacent to the blade assembly and allowing compression operation from outside the housing. A fluid bag that is deformable and is in contact with the blade assembly according to the pressure applied to the operation surface, and has an elastic bag that pushes the blade to a use position. Sixth, in the fifth configuration, the fluid in the elastic bag is a liquid. , Said fifth configuration Ioite, elasticity of volume bag is characterized in that it has a fold portion extending a pressure is exerted on the operating surface, eighth
In the fifth configuration, the incision device further includes
It is characterized by having spring means for returning the blade to the blade accommodating portion in the housing when the pressure applied to the bag is released.

[0009]

In the incision device according to the present invention, since the container contained in the container container of the housing has the pressing operation surface that can be pressed from the outside of the housing, the pressing operation surface is When pressure is applied, the piston operates to push the blade stored in the blade storage portion of the housing to the use position. The bag contains a fluid such as a liquid. If the bag has a pleated portion that expands when pressure is applied, the pleated portion pushes out the blade when pressure is applied. Further, when the transmission means has the spring means, the blade is returned to the blade accommodating portion in the housing when the pressure applied to the bag is released.

Even if the lancing device comprises a blade assembly having blades, the blades are pushed into the use position when pressure is applied to the bag.

According to the incision device of the present invention, the blade is pushed out only by pressing the bag, so that the operation is extremely easy and the surgical glove is not damaged.

[0012]

Embodiments of the present invention will be described with reference to the drawings.
1 to 4 show a scalpel 10 as an incision device having a retractable blade. The scalpel has an elongated housing 12, a resilient pouch 14 containing fluid 16, a piston 18, a spring 20, and a knife blade 22.

Here, the housing 12 serves as a handle, and the upper housing portion 24 and the lower housing portion 26 are joined by a suitable means such as a screw 28 and a dovetail joint 30. The housing 12 includes a blade accommodating portion 32 for accommodating the blade 22, and a bag 1.
4, a piston 18 and a spring 20 are included in the bag container 34. Here, the container bag storage portion 34 for storing the container bag 14 is provided with an opening so that the container bag 14 can be contacted from the outside. That is, when the housing 12 is gripped as a handle, the thumb or at least one finger of the user is arranged so as to touch the bag 14. The fluid 16 is contained in the container 14,
In this example, the fluid 16 is a sterile liquid.

Further, the head 36 of the piston 18 is the bag 1
4, and the opposite end 38 is attached to the blade 22. 1 and 2 as seen from above with the upper housing portion 24 removed,
When the knife 10 is not used, no force is exerted on the spring 20 so that the piston 18 does not enter the blade accommodating portion 32. That is, the blade 22 is safely retracted into the blade accommodating portion 32, and the head 36 of the piston 18 strongly presses against the bag 14. Also,
As shown in FIG. 4, when the scalpel 10 is not used,
The operating surface 40 of the bag is bulged laterally enough from the housing 12 so that the blade 22 can be easily pushed into the use position when the user presses the operating surface 40 appropriately.

FIG. 3 shows the state of the scalpel when in use, and the operation surface 40 of the bag 14 accommodated in the bag container 34.
Is compressed, the bag 14 is deformed to overcome the extension force of the spring 20 and push the piston 18 and the blade 22 connected thereto in the axial direction. Thus, the blade 22 is pushed out to the use position outside the housing 12. As long as pressure is applied, the blade 22 is out of the housing 12. Here, FIG. 3 is also a view seen from the upper side with the upper housing portion 24 removed similarly to FIG.

According to the scalpel of this embodiment, the blade is pushed out only by pressing the container, so that the operation is extremely easy and the surgical glove is not damaged.

FIGS. 5 and 6 show another elastic bag, designated 14 ', which is provided with a bellows-like nose 42 having a pleated structure. In this example,
When pressure is applied to the operating surface of the bag, the nose extends more easily and presses against the head of the piston 18. Therefore,
The piston 18 and the spring 20 as shown in FIGS. 1 to 3 are not required.

In the above embodiment, the blade 22
Although the piston 18 and the piston 18 are formed separately, they may be an integrated assembly member.

[0019]

As described above, according to the surgical incision device for retractable blades of the present invention, the blade can be simply pressed on the bag without damaging the surgical gloves or protective clothing. A safe and easy-to-use scalpel is provided in which the blade is pushed into the use position and the blade is housed in the housing when not in use.

[Brief description of drawings]

FIG. 1 is a sectional side view of a scalpel in an embodiment according to the present invention.

FIG. 2 is an explanatory view showing a state in which the surgical knife is not used.

FIG. 3 is an explanatory view showing a state when the surgical knife is used.

4 is a front sectional view taken along line 4-4 of FIG.

FIG. 5 is an explanatory view showing another type of elastic bag.

FIG. 6 is an explanatory view showing a state during use in which the elastic bag of FIG. 5 is pressed and deformed.

[Explanation of symbols]

 10 Surgical knife 12 Housing 14 Elastic bag 16 Fluid 18 Piston 20 Spring 22 Blade 28 Screw 30 Dovetail 32 Blade accommodating part 34 Bag accommodating part 40 Compression surface

Claims (8)

[Claims] 1. A housing having a blade accommodating portion and a bag accommodating portion, a non-use accommodating position retracted in the blade accommodating portion, and a use position pushed out from the housing, repeatedly. A movable blade, and an elastic bag containing a fluid inside, which has at least one pressing operation surface that is partially pressed by the bag containing portion and can be pressed from the outside of the housing; A transmission unit that has a piston positioned between the blade and the elastic bag, and the piston operates when pressure is applied to the operating surface of the bag, and pushes the blade from the storage position to the use position. An incision device comprising: 2. The lancing device according to claim 1, wherein the fluid in the elastic bag is a liquid. 3. The lancing device according to claim 1, wherein the elastic bag has a pleated portion that expands when pressure is applied to its operating surface. 4. The incision according to claim 1, wherein the transmission means further comprises spring means for returning the blade to the blade housing in the housing when the pressure applied to the bag is released. apparatus. 5. A housing having a handle portion and a blade storage portion therein, a storage position retracted into the blade storage portion, and a use position pushed out of the housing from the blade storage portion are repeated. A blade assembly having a blade movably mounted thereon, an operation surface disposed inside the housing adjacent to the blade assembly, and operable to be pressed from outside the housing, and containing a fluid therein An incision device which is free and has an elastic bag that contacts the blade assembly according to the pressure applied to the operation surface and pushes the blade to a use position. 6. The lancing device according to claim 5, wherein the fluid in the elastic bag is a liquid. 7. The lancing device according to claim 5, wherein the elastic bag has a pleated portion that expands when pressure is applied to the operating surface thereof. 8. The incision device according to claim 5, further comprising spring means for returning the blade to the blade housing in the housing when the pressure exerted on the bag is released. Incision device.