CN105266748A - Anti-tissue damage endoscope obturator - Google Patents

Abstract

The invention provides an endoscope obturator for preventing tissue damage, which can be pulled out or inserted from the outer sheath of the endoscope, and is characterized in that it comprises: a push rod whose outer diameter is slightly smaller than the inner diameter of the outer sheath, and The front can pass through and stretch out the closure head of the outer sheath front end. Wherein, the sealing head is made of flexible material, and the sealing head will deform when meeting the axial resistance of the outer periphery and form a smooth arc surface around the front end of the outer sheath, thereby blocking the front end of the outer sheath. The tissue damage-preventing endoscope obturator of the present invention can reduce the incidence of peripheral tissue damage.

Description

Atraumatic endoscopic obturator

technical field

The invention relates to an endoscopic obturator for preventing tissue damage, which belongs to the field of medical instruments.

Background technique

In the field of traditional endoscopes, in order to make the endoscope sheath smoothly and safely inserted into the target organ, an obturator is usually inserted into the endoscope sheath to make up for the hollowness of the endoscope sheath. cavity, and use the smooth end of the obturator to form a relatively round head end with the endoscope sheath to minimize the damage caused when the endoscope sheath is inserted into the human body, but all current endoscopes The obturator is made of rigid material, and there is still a step of the same size as the thickness of the sheath material between it and the end of the sheath, which will cause the surface of the sheath to be rough and have sharp edges, which will damage the surrounding tissue. Inflict some degree of scratching or stabbing.

Contents of the invention

The present invention was made to solve the above problems, and an object of the present invention is to provide a tissue damage-preventing endoscopic obturator capable of reducing the incidence of damage to peripheral tissues.

In order to achieve the above object, the present invention adopts the following structure:

The invention provides an endoscope obturator for preventing tissue damage, which can be pulled out or inserted from the outer sheath of the endoscope, and is characterized in that it comprises: a push rod whose outer diameter is slightly smaller than the inner diameter of the outer sheath, and a The front can pass through and stretch out the closure head of the outer sheath front end.

Wherein, the sealing head is made of flexible material, and the sealing head will deform when meeting the axial resistance of the outer periphery and form a smooth arc surface around the front end of the outer sheath, thereby covering the edge of the front end of the outer sheath.

In addition, in the tissue damage-preventing endoscopic obturator of the present invention, it can also have such a feature: wherein, when the tissue damage-preventing endoscopic obturator is inserted into human tissue, the sealing head can be adjusted according to the shape of the tissue or organ. Change with shape.

In addition, in the tissue damage-preventing endoscope obturator of the present invention, it can also have such a feature: wherein, the flexible material is silica gel, silica gel modified material, rubber, rubber modified material, polyurethane, polyurethane modified material, Any one or a combination of at least two of thermoplastic elastomers or thermoplastic elastomer modified materials.

In addition, in the tissue damage-preventing endoscope obturator of the present invention, it may also have such a feature: wherein, the end surface of the closing head is provided with a columnar protrusion of external thread, and the front end of the push rod is provided to cooperate with the protrusion. And the surface has grooves of internal threads, and the external threads and the internal threads cooperate with each other.

Invention function and effect

According to the tissue damage-preventing endoscopic obturator of the present invention, since the sealing head is made of flexible material, when the tissue-damage-preventing endoscopic obturator is inserted into the human tissue, the sealing head will be deformed when it encounters the peripheral axial resistance. A smooth arc surface is formed around the front end of the outer sheath, which can cover the front end of the outer sheath, so that sharp edges are not exposed on the surface of the outer sheath, thereby reducing the incidence of damage to surrounding tissues.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the anti-tissue damage endoscopic obturator in an embodiment of the present invention;

Fig. 2 is the structural representation of the anti-tissue damage endoscopic obturator in an embodiment of the present invention;

Fig. 3 is a schematic cross-sectional view of an embodiment of the tissue damage-preventing endoscopic obturator in an embodiment;

Fig. 4 is a schematic cross-sectional view of the anti-tissue damage endoscopic obturator of the present invention when the sealing head is bent as a whole;

Fig. 5 is a structural schematic diagram of the anti-tissue damage endoscopic obturator of the present invention when the sealing head is deformed;

Fig. 6 is a partial schematic view of the anti-tissue damage endoscopic obturator of the present invention when the sealing head is deformed;

Fig. 7 is a schematic view of the structure of the anti-tissue damage endoscopic obturator of the present invention inserted into the body; and

Fig. 8 is a partial schematic diagram of the endoscopic obturator for preventing tissue damage inserted into the body of the present invention.

detailed description

The endoscopic obturator for preventing tissue damage involved in the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic perspective view of the three-dimensional structure of the endoscopic obturator for preventing tissue damage in an embodiment of the present invention.

As shown in FIG. 1 , an endoscopic obturator 10 for preventing tissue damage includes a push rod 1 and a closing head 2 .

Fig. 2 is a schematic structural view of an embodiment of the tissue damage-preventing endoscopic obturator of the present invention.

Fig. 3 is a schematic cross-sectional view of an embodiment of the tissue damage-preventing endoscopic obturator of the present invention.

As shown in FIG. 3 , the outer diameter of the front end of the push rod 1 is slightly smaller than the inner diameter of the outer sheath 3 . As shown in FIG. 2 and FIG. 3 , when the push rod 1 is inserted into the outer sheath 3 , the front end of the push rod 1 can just coincide with the outer sheath 3 . The diameter of the middle section of the push rod 1 is smaller than the front end, so that when the push rod 1 is inserted into or pulled out of the outer sheath 3, the resistance is small.

The closing head 2 is connected in front of the push rod 1, and the push rod 1 can drive the closing head 2 to be pulled out or inserted from the outer sheath 3 of the endoscope, so that the closing head 2 can pass through the outer sheath 3 and just extend out of the front end of the outer sheath 3 .

As shown in FIG. 1 , a rounding table 11 is provided at the end of the push rod 1 , and a circle of cams 111 is provided on the slope of the rounding table 11 . As shown in FIG. 3 , the structure at the end of the push rod 1 just matches the inner cavity at the end of the outer sheath 3 , so that when the closing head 2 just extends out of the front end of the outer sheath 3 , the push rod 1 can be fixed on the outer sheath 3 . A handle 12 is also arranged on the back of the rounding table 11, which is located outside the outer sheath, which is convenient for the user to control the push rod.

The end of the closing head 2 is provided with a cylindrical protrusion 22 with external thread on the surface, and the front end of the push rod 1 is provided with a groove that matches the protrusion 22 and has an internal thread on the surface. The external thread on the protrusion 22 and the internal thread in the groove Co-ordination. This makes it easy to disassemble and replace the closing head 2 from the push rod 1 .

The surface of the sealing head 2 is smooth, the tip is a smooth round head, and the middle section is in the shape of a truncated cone with a small slope. Such a structure is conducive to the advancement of the sealing head 2 in tissues and organs.

Fig. 4 is a schematic cross-sectional view of the endoscopic obturator for preventing tissue damage of the present invention when the sealing head is bent as a whole.

As shown in Fig. 4, the sealing head 2 is made of flexible material, and the flexible material is silicone. When external force is received, the sealing head 2 can be bent as a whole so as to follow the shape of the tissue or organ.

Fig. 5 is a schematic structural view of the tissue damage-preventing endoscopic obturator of the present invention when the sealing head is deformed.

Fig. 6 is a partial schematic view of the tissue damage-preventing endoscopic obturator of the present invention when the sealing head is deformed. FIG. 6 is an enlarged view of the structure enclosed by the dotted circle in FIG. 5 .

As shown in Fig. 5 and Fig. 6, when the sealing head 2 encounters the axial resistance F of the outer periphery, it will be deformed and a small section of flange 21 will extend forward at the end, and the flange 21 will be filled around the front end of the outer sheath 3 to form a circular arc slip. The surface covers the thickness step at the end of the outer sheath 3, so that the sharp edge of the end surface of the outer sheath 3 is not exposed.

Use process:

When it is necessary to observe the tissues and organs in the human body, at first the sealing head 2 and the push rod 1 are screwed together. The handle 12 is grasped and pushed forward, and the anti-tissue damage endoscopic obturator 10 is inserted into the outer sheath 3 until the closing head 2 just extends out of the front end of the outer sheath 3 . Then, the push rod 1 is rotated so that the end of the push rod 1 and the end of the outer sheath 3 are locked together.

Fig. 7 is a schematic diagram of the structure of the tissue damage-preventing endoscopic obturator inserted into the body of the present invention.

Fig. 8 is a partial schematic diagram of the endoscopic obturator for preventing tissue damage inserted into the body of the present invention. FIG. 8 is an enlarged view of the structure inside the dotted circle in FIG. 7 .

As shown in Figure 7 and Figure 8, the sealing head 2 is inserted into the tissue organ together with the push rod 1, the sealing head 2 encounters the resistance from the human body tissue, it will follow the shape of the tissue or organ, and it will be in the outer sheath 3 A smooth arc surface is formed around the front end, thereby covering the front end of the outer sheath 3 .

When the outer sheath 3 reaches the target position, turn the push rod 1, the end of the push rod 1 and the end of the outer sheath 3 are loosened, and the handle 12 is pulled, so that the push rod 1 drives the closing head 2 to exit the outer sheath 3, and the outer sheath 3 is left In vivo, waiting for follow-up operations.

Function and effect of embodiment

According to the anti-tissue damage endoscopic obturator involved in this embodiment, since the sealing head is made of flexible material, when the tissue damage-preventing endoscopic obturator is inserted into human tissue, the sealing head will meet the peripheral axial resistance. Deformation occurs and a smooth arc surface is formed around the front end of the sheath, which can cover the front end of the sheath so that sharp edges are not exposed on the surface of the sheath, thereby reducing the incidence of damage to surrounding tissues.

In addition, when the anti-tissue damage endoscopic obturator is inserted into human tissue, the sealing head can change with the shape of the tissue or organ without conflicting with the surrounding tissue, so the flexible sealing head is easy to be inserted into the tissue. Moving forward, the endoscope outer sheath can be inserted into the target organ more smoothly, and the incidence of damage to surrounding tissues is further reduced.

Of course, the tissue damage-preventing endoscopic obturator involved in the present invention is not limited to the description in the above embodiments. The flexible material can also be any one or a combination of at least two of silica gel, silica gel modified material, rubber, rubber modified material, polyurethane, polyurethane modified material, thermoplastic elastomer or thermoplastic elastomer modified material.

Claims (4)

1. An anti-tissue damage endoscope obturator, which can be extracted or inserted from the outer sheath of the endoscope, is characterized in that, comprising: a push rod having an outer diameter slightly smaller than the inner diameter of said sheath, and A closed head connected to the front of the push rod and capable of passing through and extending out from the front end of the outer sheath, Wherein, the sealing head is made of flexible material, and the sealing head will deform when encountering the axial resistance of the outer periphery and form a smooth arc surface around the front end of the outer sheath, thereby covering the edge of the front end of the outer sheath. 2. The anti-tissue damage endoscopic obturator according to claim 1, characterized in that: Wherein, when the tissue damage-preventing endoscopic obturator is inserted into human tissue, the sealing head can follow the shape of the tissue or organ. 3. The anti-tissue damage endoscopic obturator according to claim 1, characterized in that: Wherein, the flexible material is any one or a combination of at least two of silica gel, silica gel modified material, rubber, rubber modified material, polyurethane, polyurethane modified material, thermoplastic elastomer or thermoplastic elastomer modified material. 4. The anti-tissue damage endoscopic obturator according to claim 1, characterized in that: Wherein, the end surface of the closing head is provided with a columnar protrusion with external threads, and the front end of the push rod is provided with a groove that matches the protrusion and has internal threads on the surface, and the external threads and the internal threads Co-ordination.