TWI852777B - Cannula device with deformable balloon and cannula device assembly - Google Patents

Abstract

A cannula device with a deformable balloon comprises an upper cannula, an airbag component and a lower cannula arranged in sequence along an axis. The airbag component is made of a flexible material and presents a cannula state with an outer diameter larger than that of the lower cannula when no external force is applied, and presents a stretched state when subjected to a stretching force in the direction of the axis. In the stretched state, the outer diameter of the cannula is smaller than that in the cannula state, and the length in the direction of the axis is greater than that in the cannula state. Thus, after the cannula is inserted into the human body, the cannula automatically returns to the cannula state by simply removing the applied force, so there is no need to inflate or set up a gas flow channel. In addition, the lower cannula can swing relative to the cannula to increase the maximum working angle of the instrument during surgery.

Description

Cannula device with deformable balloon and cannula device assembly

The present invention relates to a cannula device and a cannula device set, and in particular to a cannula device and a cannula device set with a deformable balloon.

A trocar is a medical device that is commonly used in surgery, especially minimally invasive surgery (also known as laparoscopic surgery). Trocars are primarily used to create one or more instrument access channels in the patient's body so that surgeons can perform minimally invasive surgery.

The method of use is that the surgeon makes a small incision in the patient's abdomen, inserts a cannula through the small incision, and then guides an endoscope or other surgical instruments into the abdominal cavity through the cannula. This surgical method has the advantages of less postoperative pain and shorter recovery time due to the smaller incision.

One known cannula is shown in European Patent No. EP2001377B1 applied for by Applied Medical of the United States. The cannula has an inflatable balloon at the distal end (the end farther from the doctor during surgery). After the cannula is inserted into the human body, an external syringe can be used to inflate the balloon so that the balloon expands and can rest against the inner side of the abdominal wall of the human body, thereby preventing the cannula from being accidentally pulled out of the human body during surgery.

However, the conventional sleeve still has the following deficiencies:

1. The time it takes for the balloon to inflate: When the cannula is inserted into the human body, the balloon must be deflated so that it does not get stuck on the outside of the abdomen. After the cannula enters the human body, the balloon is inflated with a syringe to inflate it, but inflating it will increase the time of the operation, and a longer operation time will increase the risk of the operation.

2. A gas flow channel needs to be provided: Since a gas flow channel is required to connect the syringe and the balloon when inflating, a gas flow channel needs to be provided on the sleeve, resulting in a complicated sleeve structure.

3. The movement angle of the instrument is limited: Please refer to Figure 1. The sleeve 11 is generally designed to be straight. Therefore, after the instrument 12 enters the sleeve 11, the sleeve 11 remains upright and the instrument 12 can only move within the inner diameter of the tube wall, resulting in a limited working angle. The angle between the solid line instrument 12 and the imaginary line instrument 12 in Figure 1 is the maximum working angle of the instrument 12.

Therefore, the object of the present invention is to provide a cannula device with a deformable balloon that can improve the above-mentioned problems.

Therefore, the sleeve device with a deformable balloon of the present invention is suitable for being detachably assembled with a needle device, and comprises an upper sleeve, a balloon component and a lower sleeve sequentially arranged along an axis.

The upper sleeve, the airbag component and the lower sleeve jointly define an instrument channel suitable for the puncture device to penetrate. The airbag component is made of a flexible material and presents an airbag state with an outer diameter larger than that of the lower sleeve when no external force is applied. When subjected to a tensile force along the axis, it presents a stretched state. In the stretched state, the outer diameter of the airbag component is smaller than the outer diameter in the airbag state, and the length in the direction of the axis is greater than the length in the airbag state.

Therefore, the object of the present invention is to provide a cannula device assembly with a deformable balloon that can improve the above-mentioned problems.

Therefore, the sleeve device set with a deformable balloon of the present invention includes a needle device and a sleeve device.

The lancet device extends along an axis.

The sleeve device includes an upper sleeve, an airbag component and a lower sleeve arranged in sequence along the axis. The upper sleeve, the airbag component and the lower sleeve jointly define an instrument channel for the puncture device to pass through. The airbag component is made of a flexible material and presents an airbag state with an outer diameter larger than that of the lower sleeve when not subjected to external force. When the puncture needle device penetrates the instrument channel and abuts against the lower sleeve to apply a tensile force along the axis, the airbag component is stretched by the lower sleeve along the axis and presents a stretched state. In the stretched state, the outer diameter of the airbag component is smaller than the outer diameter in the airbag state, and the length in the direction of the axis is greater than the length in the airbag state.

The effect of the present invention is that: through the above arrangement, after the airbag is inserted into the human body, the airbag will automatically return to the airbag state by simply removing the force applied to it, so there is no need to inflate it, no extra inflating time is required, and no gas flow channel is required, which will not increase the complexity of the structure. Furthermore, since the airbag is made of a flexible material, the lower sleeve can swing relative to the airbag, thereby increasing the maximum working angle of the instrument during surgery.

2 , 3 and 4 , an embodiment of the cannula device set with a deformable balloon of the present invention comprises a needle device 2 and a cannula device 3 .

The needle device 2 extends along an axis L, and includes a mounting seat 21, a needle section 22, and a needle head section 23 arranged in sequence along the axis L. The mounting seat 21 has two fasteners 211. The needle section 22 is connected to the mounting seat 21 and extends along the axis L. The needle head section 23 is connected to the needle section 22 and is in the shape of a needle tip with a tapered outer diameter at the end (the lower part of FIG. 2 ).

The casing device 3 comprises a casing module 4 and optionally further comprises a barrier module 5 (see FIG. 7 ).

The sleeve module 4 has an upper sleeve 41 , an airbag 42 and a lower sleeve 43 arranged in sequence along the axis L. The upper sleeve 41 , the airbag 42 and the lower sleeve 43 jointly define an instrument channel 44 for the puncture device 2 to pass through.

Referring to FIG. 2 and FIG. 5 , the upper sleeve 41 has two buckle parts 411 respectively corresponding to the buckle parts 211. When the lancet device 2 is assembled to the sleeve module 4, the buckle parts 211 are buckled to the buckle parts 411 to fix the lancet device 2 to the sleeve module 4. When the lancet device 2 is to be removed, the buckle parts 211 of the lancet device 2 are only pressed to move the buckle parts 211 inwardly and disengage from the buckle parts 411, and the lancet device 2 can be pulled upward out of the sleeve module 4.

Referring to FIG. 2 , FIG. 3 and FIG. 4 , the airbag member 42 is made of a flexible material, such as silicone and artificial rubber. When no external force is applied, the airbag member 42 presents an airbag state with an outer diameter greater than the lower sleeve 43 (as shown in FIG. 3 ). At this time, the two ends of the airbag member 42 along the axis L are close to each other, so that the airbag member 42 forms an oblate spherical shape with an outer diameter greater than the length along the axis L. When the puncture needle device 2 penetrates the instrument channel 44 and abuts against the lower sleeve 43 to apply a tensile force along the direction of the axis L, the airbag component 42 is stretched by the lower sleeve 43 along the direction of the axis L and presents a stretched state (as shown in FIG. 4 ). In the stretched state, the outer diameter of the airbag component 42 is smaller than the outer diameter in the airbag state, and is approximately the same as the outer diameter of the upper sleeve 41 or the lower sleeve 43, and the length of the airbag component 42 along the direction of the axis L is greater than the length in the airbag state.

The airbag component 42 has an upper tube section 421, an airbag section 422 and a lower tube section 423 which are arranged in sequence along the axis L. The upper tube section 421 is sleeved on the upper sleeve 41, and the lower tube section 423 is sleeved on the lower sleeve 43. The two ends of the airbag section 422 are respectively connected to one end of the upper tube section 421 opposite to the upper sleeve 41 and one end of the lower tube section 423 opposite to the lower sleeve 43. In the airbag state, the outer diameter of the airbag section 422 is larger than that of the upper tube section 421 and the lower tube section 423. At this time, the two ends of the airbag section 422 along the direction of the axis L are close to each other, so that the airbag section 422 forms a flat spherical balloon shape with an outer diameter larger than the length along the direction of the axis L. In the stretched state, the outer diameter of the airbag section 422 is smaller than that in the airbag state, and is approximately the same as the outer diameter of the upper tube section 421 or the lower tube section 423, and the length along the axis L is greater than that in the airbag state.

Referring to FIG. 6 and FIG. 8 , one end of the lower sleeve 43 along the axis L is connected to the airbag member 42, and the other end (i.e., the end away from the airbag member 42) can swing relative to the airbag member 42 due to the flexibility of the airbag member 42. The inner diameter of the end of the lower sleeve 43 away from the airbag member 42 gradually shrinks along the axis L. The minimum inner diameter of the lower sleeve 43 matches the maximum outer diameter of the needle section 23, so that the needle section 23 can be detachably engaged with the lower sleeve 43. That is, by increasing the draft angle of the lower sleeve 43 to interfere with the needle section 23, the lower sleeve 43 and the needle section 23 can be temporarily stuck and can be separated after applying a certain amount of force.

Referring to FIG. 2 and FIG. 4 , the outer circumference of one end of the upper sleeve 41 near the airbag 42 has a saw-like cross section along the axis L, and the outer circumference of one end of the lower sleeve 43 near the airbag 42 has a saw-like cross section along the axis L. For example, one end of the upper sleeve 41 near the airbag 42 and one end of the lower sleeve 43 near the airbag 42 can be designed to be a tower joint. In this way, the stability of the two ends of the airbag 42 being sleeved on the upper sleeve 41 and the lower sleeve 43 can be increased.

Referring to FIG. 7 , the barrier module 5 is annularly sleeved on the sleeve module 4 and can be adjusted up and down along the axis L. The barrier module 5 can be Hasson or an annular flexible material, such as thermoplastic rubber. Since the structure of Hasson is familiar to the industry, it will not be described in detail here.

Refer to Figures 3, 4 and 7 for an illustration of actual application:

When the sleeve module 4 is not subjected to external force, the airbag 42 will be in the expanded airbag state (as shown in FIG. 3 ), and when the puncture device 2 penetrates the instrument channel 44, the outer circumference of the needle section 23 will be engaged with the inner circumference of the lower sleeve 43, and with the downward movement, the lower sleeve 43 is pulled to link the airbag 42, so that the airbag 42 is stretched and presents the stretched state as shown in FIG. 4. Then, the needle section 23 is used to pierce the human body (for example, the abdominal wall 8), and after the sleeve module 4 is immersed in the human body to a predetermined depth, the puncture device 2 is removed. When the needle device 2 is pulled out upwards and the needle section 23 is disengaged from the lower sleeve 43, the downward force applied to the lower sleeve 43 disappears, and the downward tensile force applied to the airbag 42 also disappears, so that the airbag 42 returns to the airbag state when it is not subjected to external force, and can press against the inner side of the abdominal wall 8, thereby preventing the sleeve module 4 from moving upward during the operation. Then, the barrier module 5 is adjusted downward, so that the barrier module 5 and the airbag 42 clamp the abdominal wall 8 up and down, so that the sleeve module 4 can be fixed in position and will not move up and down during the operation.

Referring to FIG. 8 , when a surgeon uses an instrument 9 to penetrate the sleeve module 4 for surgery, since the airbag member 42 is made of a flexible material, the lower sleeve 43 can swing relative to the airbag member 42 as the instrument 9 moves, thereby increasing the maximum working angle of the instrument 9 during surgery.

4 and 7 , when the operation is completed and the sleeve module 4 needs to be removed, the needle device 2 is first inserted into the instrument channel 44 , and the airbag 42 is stretched to the stretched state shown in FIG. 4 , and then the entire sleeve module 4 can be pulled out.

Referring to FIG. 2 , FIG. 3 and FIG. 4 , through the above description, the effects of this embodiment are as follows:

By using a flexible material to make the airbag component 42, and arranging the airbag component 42 to present the airbag state when not subjected to external force, and to present the stretched state when stretched, the airbag component 42 can be easily penetrated into the human body in the stretched state, and can be well abutted and fixed on the inner side of the human body in the airbag state, thereby preventing the sleeve module 4 from being displaced during surgical operations, or even pulling the sleeve module 4 out of the human body.

Furthermore, since the airbag component 42 will automatically return to the airbag state when no external force is applied, after the airbag component 42 is inserted into the human body, it is only necessary to remove the force applied thereto, and the airbag component 42 will automatically return to the airbag state without the need for inflation as in the known technology. There is no need for additional inflation time, no additional surgical risks, no need to set up a gas flow channel, and the structural complexity of the sleeve module 4 will not be increased.

Furthermore, since the airbag member 42 is made of a flexible material, the lower sleeve 43 can swing relative to the airbag member 42, thereby increasing the maximum working angle of the instrument 9 (see FIG. 8 ) during surgery.

In summary, the cannula device and cannula device assembly with a deformable balloon of the present invention can indeed achieve the purpose of the present invention.

However, the above is only an example of the implementation of the present invention, and it cannot be used to limit the scope of the implementation of the present invention. All simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the patent specification are still within the scope of the patent of the present invention.

2: needle device 21: mounting seat 211: buckle 22: needle section 23: needle section 3: cannula device 4: cannula module 41: upper cannula 411: buckle part 42: airbag part 421: upper tube section 422: airbag section 423: lower tube section 43: lower cannula 44: instrument channel 5: barrier module 8: abdominal wall 9: instrument L: axis

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: FIG. 1 is a schematic diagram illustrating the maximum working angle of a device when a known sleeve device is provided with a device; FIG. 2 is a three-dimensional exploded view of an embodiment of a sleeve device assembly with a deformable balloon of the present invention; FIG. 3 is a three-dimensional assembly view of a sleeve module of the embodiment; FIG. 4 is an assembly view of the embodiment; FIG. 5 is a partial enlarged cross-sectional view of FIG. 4; FIG. 6 is another partial enlarged cross-sectional view of FIG. 4; FIG. 7 is a schematic diagram of the embodiment after being inserted into the human body; and FIG. 8 is a schematic diagram illustrating the maximum working angle of the device when a device is provided in the sleeve module of the embodiment.

2: Needle device

21: Mounting seat

211: Fasteners

22: Needle section

23: Needle segment

3: Casing device

4: Casing module

41: Put on the casing

411: Buckle part

42: Airbag parts

421: Upper pipe section

422: Airbag section

423: Lower pipe section

43: Casing installation

Claims (10)

A sleeve device with a deformable balloon is suitable for being detachably assembled with a lancet device, and comprises: an upper sleeve, an airbag component and a lower sleeve arranged in sequence along an axis, the upper sleeve, the airbag component and the lower sleeve jointly define an instrument channel suitable for the lancet device to penetrate, the upper sleeve and the lower sleeve are spaced along the axis so that the space defined by the airbag component is straight Connected to the instrument channel, the airbag is made of a flexible material and presents an airbag state with an outer diameter greater than that of the lower sleeve when not subjected to external force, and presents a stretched state when subjected to a stretching force along the axis. In the stretched state, the outer diameter of the airbag is smaller than the outer diameter in the airbag state, and the length in the direction of the axis is greater than the length in the airbag state. A sleeve device with a deformable balloon as described in claim 1, wherein one end of the lower sleeve along the axis is connected to the airbag component, and the other end can swing relative to the airbag component. The sleeve device with a deformable balloon as described in claim 1, wherein the airbag component has an upper tube section, an airbag section and a lower tube section arranged in sequence along the axis, the upper tube section is sleeved with the upper sleeve, the lower tube section is sleeved with the lower sleeve, and the two ends of the airbag section are respectively connected to one end of the upper tube section opposite to the upper sleeve and one end of the lower tube section opposite to the lower sleeve, in the airbag state, the outer diameter of the airbag section is larger than the upper tube section and the lower tube section, in the stretched state, the outer diameter of the airbag section is smaller than the outer diameter in the airbag state, and the length in the direction along the axis is greater than the length in the airbag state. The sleeve device with a deformable balloon as described in claim 1, wherein the cross section of the outer peripheral surface of the upper sleeve adjacent to one end of the airbag member along the axis is saw-shaped, and the cross section of the outer peripheral surface of the lower sleeve adjacent to one end of the airbag member along the axis is saw-shaped. As described in claim 1, the sleeve device with a deformable balloon, wherein one end of the upper sleeve adjacent to the airbag component and one end of the lower sleeve adjacent to the airbag component are both tower joints. A cannula device set with a deformable balloon comprises: a lancet device extending along an axis; and a cannula device, comprising an upper cannula, an airbag component and a lower cannula arranged in sequence along the axis, the upper cannula, the airbag component and the lower cannula jointly defining an instrument channel for the lancet device to penetrate, the airbag component being made of a flexible material and presenting an outer diameter greater than the outer diameter of the cannula when no external force is applied. The airbag state of the lower sleeve is that when the needle device penetrates the instrument channel and abuts against the lower sleeve to apply a tensile force along the axis, the airbag is stretched by the lower sleeve along the axis and presents a stretched state. In the stretched state, the outer diameter of the airbag is smaller than the outer diameter in the airbag state, and the length in the axis direction is greater than the length in the airbag state. A sleeve device assembly with a deformable balloon as described in claim 6, wherein one end of the lower sleeve along the axis is connected to the airbag component, and the other end can swing relative to the airbag component. As described in claim 7, the sleeve device set with a deformable balloon, wherein the needle device includes a needle segment and a needle segment arranged in sequence along the axial direction, and the maximum outer diameter of the needle segment matches the minimum inner diameter of the lower sleeve, so that the needle segment can be detachably engaged with the lower sleeve. The sleeve device set with a deformable balloon as described in claim 6, wherein the airbag component has an upper tube section, an airbag section and a lower tube section arranged in sequence along the axis, the upper tube section is sleeved with the upper sleeve, the lower tube section is sleeved with the lower sleeve, and the two ends of the airbag section are respectively connected to one end of the upper tube section opposite to the upper sleeve and one end of the lower tube section opposite to the lower sleeve, in the airbag state, the outer diameter of the airbag section is larger than the upper tube section and the lower tube section, in the stretched state, the outer diameter of the airbag section is smaller than the outer diameter in the airbag state, and the length in the direction along the axis is greater than the length in the airbag state. As described in claim 6, the outer peripheral surface of the upper sleeve adjacent to one end of the airbag member has a saw-like cross section along the axis, and the outer peripheral surface of the lower sleeve adjacent to one end of the airbag member has a saw-like cross section along the axis.

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