KR102070904B1 - Trocar for chest - Google Patents

Abstract

Thoracic trocar according to an aspect of the present invention includes a tubular cannula, a trocar inserted into the cannula, a liquid blocking member installed on the outer circumferential surface of the cannula, grooves are formed in the circumferential direction on the outer circumferential surface of the cannula, The liquid blocking member is fixed to the groove portion.

Description

Thoracic Trocar {TROCAR FOR CHEST}

The present invention relates to a trocar for thoracic cavity. More particularly, it relates to a thoracic trocar that is inserted into the chest wall of the patient and guides the endoscope or the surgical tool when the endoscope or the surgical tool is inserted into the chest cavity of the patient.

When a doctor operates on a patient who has diseased major organs such as the lungs, liver, or stomach in the chest cavity or abdominal cavity, the incision is made. In the past, doctors cut a patient's skin several centimeters to tens of centimeters and operated on a problem organ. This is called thoracotomy or laparotomy. Recently, many small holes about 1 centimeter in size are created in the body to operate. These holes allow endoscopes and other medical instruments to be inserted into the body to remove parts of the organs and to seal the necessary areas. This can reduce the surgical scar of the patient as much as possible and reduce the recovery time by reducing the injury caused by surgery.

Thoracic trocars are used for thoracic surgery. Since the ribs are located in the chest, a hole is usually drilled in the gap between the ribs and the ribs of the patient for surgery. Sometimes the ribs are broken to increase the size of the hole. Insert the trocar into the hole thus formed. The thoracic trocar is formed into an elongated cylindrical shape. Sometimes the tip of the trocar can be sharpened and a hole can be made in the patient's chest using the trocar directly.

Japanese Laid-Open Patent Publication No. 2004-430 (published on May 1, 2004) discloses an insert coat tube (trocar). As disclosed in this prior document, the insertable coat tube may include a conduit and an introduction member. The catheter is inserted into the patient's chest wall during surgery to guide surgical instruments and to protect the patient's chest wall. The introduction member is used when inserting an insertion coat tube into the chest wall. The introduction member is removed during surgery. On the other hand, the liquid inlet prevention member is installed on the outside of the conduit to prevent the blood or other liquid of the patient to flow along the conduit to the end of the conduit. The endoscope passes through the inside of the catheter and enters the patient's chest. This is to prevent the patient's blood or other liquid from flowing through the catheter and eventually covering the endoscope.

Japanese Laid-Open Patent No. 2004-430 (published on May 1, 2004)

Embodiments of the present invention provide a thoracic trocar that has a structure that can smoothly pass through the patient's chest wall to have a minimal burden on the patient's body.

Embodiments of the present invention provide a thoracic trocar having a stable structure so that a part of the part does not leave when passing through the chest wall of the patient.

Thoracic trocar according to an aspect of the present invention includes a tubular cannula, a trocar inserted into the cannula, a liquid blocking member installed on the outer circumferential surface of the cannula, grooves are formed in the circumferential direction on the outer circumferential surface of the cannula The liquid blocking member is fixed to the groove portion.

In addition, both sides of the groove portion of the cannula is formed with an inclined portion that gradually increases in outer diameter toward the groove portion, the liquid blocking member extends outward from the coupling portion and the coupling portion installed in the groove portion, integrally with the coupling portion It characterized in that it comprises a soft blocking film portion formed.

In addition, the coupling portion is formed in a ring band shape, characterized in that the inclined portion and the surface of the coupling portion forms a streamlined curved surface.

In addition, a portion in which the blocking membrane portion meets the coupling portion is formed with a concave portion in which the outer diameter of the coupling portion is sharply reduced so that the blocking membrane can be easily flipped off.

In addition, the barrier layer is formed to be convex, like an umbrella, characterized in that the thickness is reduced toward the outer side from the coupling portion.

According to the present invention, even when the thoracic trocar is inserted into the patient's body, the liquid blocking member may be firmly coupled so as not to be separated from the cannula.

According to the present invention, when the thoracic trocar is inserted into the patient's body, the liquid blocking member can be smoothly flipped, thereby reducing the possibility of applying pressure to the patient's body.

1 is a front view showing a trocar for thoracic cavity according to an embodiment of the present invention,
Figure 2 is a partial cross-sectional view showing a thoracic trocar according to an embodiment of the present invention,
3 is a partially enlarged cross-sectional view showing a trocar for thoracic cavity according to an embodiment of the present invention;
4 to 7 is a partial cross-sectional view showing a process in which the trocar is inserted into the chest wall of the patient according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The accompanying drawings show exemplary forms of the present invention, which are provided to explain the present invention in more detail, and the technical scope of the present invention is not limited thereto.

In addition, irrespective of the reference numerals, the same or corresponding components will be given the same reference numerals, and redundant description thereof will be omitted, and the size and shape of each illustrated member may be exaggerated or reduced for convenience of description. have.

On the other hand, terms including ordinal numbers such as first or second may be used to describe various components, but the components are not limited by the terms, and the terms are defined by one component from another component. Used only for the purpose of distinguishing.

1 is a front view showing a thoracic trocar according to an embodiment of the present invention, Figure 2 is a partial cross-sectional view showing a thoracic trocar according to an embodiment of the present invention, Figure 3 is a thoracic trocar according to an embodiment of the present invention 4 to 7 are some enlarged cross-sectional views illustrating a trocar inserted into a chest wall of a patient according to an exemplary embodiment of the present invention.

As shown in FIGS. 1 to 3, the thoracic trocar according to an embodiment of the present invention may include a trocar 10 and a cannula 20. The trocar 10 and the cannula 20 may be coupled to each other. Both the cannula 20 and the trocar 10 are formed in a cylindrical shape, and through holes are formed in the cannula 20. The trocar 10 may be inserted into the through hole. The trocar 10 and the cannula 20 may be inserted into the thoracic cavity of the patient under surgery while being combined.

One end of the trocar 10 is pointed, the other end is a handle 19 is formed. The pointed part is the first insertion into the patient's body when the thoracic trocar is inserted into the patient's chest cavity. It is formed to be inclined so as to be inserted smoothly. The opposite handle 19 is formed to have a larger diameter than the body portion of the trocar 10. Since the user grasps the handle 19 by hand and inserts or extracts the trocar 10 into the body of the patient, it is formed to be easy to grasp according to the average hand size.

Cannula 20 is also formed in a cylindrical shape and the trocar 10 is inserted into the through-holes. Accordingly, the cannula 20 surrounds the central portion of the trocar 10. The inner diameter of the cannula 20 is slightly larger than the outer diameter of the trocar 10 so that the trocar 10 can slide smoothly when it is inserted into the cannula 20 and extracted.

An extension 28 is provided at one end of the cannula 20, that is, a portion close to the handle 19 of the trocar 10 while the trocar 10 is inserted into the cannula 20 as shown in FIG. 2. Is formed. The extension 28 is formed to gradually expand the diameter of the cannula 20 to be fitted to the handle 19. The maximum diameter of the extension 28 is formed to be smaller than the maximum diameter of the handle 19. The cannula 20 is not released from the trocar 10 when the user grasps the handle 19 and inserts the thoracic trocar into the patient's body. In addition, the cannula 20 and the trocar 10 may be separated when the trocar 10 is extracted by holding the handle 19. Therefore, pulling the handle 19 in the state where the thoracic trocar is inserted into the patient's body, the trocar 10 is separated from the cannula 20 and the cannula 20 can be maintained in the patient's chest wall. In the state in which the cannula 20 and the trocar 10 are coupled, only both ends of the trocar 10 are exposed.

The liquid blocking member 30 is installed at the other end of the cannula 20, that is, the portion close to the pointed tip of the trocar 10 with the trocar 10 inserted into the cannula 20 as shown in FIG. 2. do. As shown in FIGS. 2 and 3, the liquid blocking member 30 includes a ring band coupling portion 31 coupled to the cannula 20 and a blocking membrane portion 35 formed on one surface of the coupling portion 31. ).

The liquid blocking member 30 has a function of blocking the liquid such as blood of the patient flows along the outer surface of the cannula 20 to bury the endoscope or surgical instruments. Since the liquid blocking member 30 is installed on the outer surface of the end of the cannula 20, the operation of inserting the trocar into the patient body may be prevented. Since the overall outer diameter of the trocar increases due to the liquid blocking member 30, a larger hole may be formed in the body of the patient. Sometimes the liquid blocking member 30 may leave the cannula 20 and remain on the patient's body.

Thoracic trocar according to an embodiment of the present invention was specially formed in the shape of the cannula 20 and the liquid blocking member 30 to block the above possibilities.

One end of the cannula 20 is formed with a groove 37 into which a ring band coupling portion 31 can be inserted. The groove 37 is formed along the circumferential direction on the outer surface of the cannula 20. The groove portion 37 is formed to have a constant width (W) so that the coupling portion 31 is not separated in the state in which the liquid blocking member 30 is accommodated. The engaging portion 31 has the same width as the groove portion 37 and is embedded in the groove portion 37. The liquid blocking member 30 may be made of a soft silicone resin having elasticity. Therefore, the inner diameter of the coupling portion 31 of the liquid blocking member 30 is made to be smaller than the outer diameter of the groove 37 so that the liquid blocking member 30 is in close contact with the groove 37 of the cannula 20. can do.

The first inclined portion 21 and the second inclined portion 23 are formed on both sides of the groove portion 37. The first inclined portion 21 may be formed by increasing the outer diameter of the cannula 20 gradually from the end of the cannula 20 toward the center. The second inclined portion 23 may be made by forming the outer diameter of the cannula 20 to gradually decrease away from the groove portion 37. Therefore, as shown in FIG. 3, the end of the cannula 20 gradually increases in outer diameter at the first inclined portion 21 toward the central side of the cannula 20, and decreases in the groove 37 to maintain a constant outer diameter. The second inclined portion 23 may have a cross-sectional profile that gradually decreases again after the outer diameter increases. The cannula 20 changes in thickness only at the end where the liquid blocking member 30 is installed, and the thickness of the remaining part remains the same overall.

In the center of the coupling portion 31 of the liquid blocking member 30, a blocking film portion 35 is formed outward, and the blocking film portion 35 is formed of a convex-like film. The blocking film portion 35 extends outward from the wide ring-shaped coupling portion 31. The thickness of the blocking film portion 35 is thickest in the vicinity of the coupling portion 31 and gradually thinner toward the outside. The blocking film part 35 is formed to be gradually curved toward the first inclined part 21 toward the outside, and is formed to be convex toward the second inclined part 23.

The first convex part 32 and the second convex part 33 are formed at both sides of the center in which the coupling part 31 is coupled to the blocking film part 35. The outer diameter of the engaging portion 31 is the same as the outer diameter of the first inclined portion 21 on the first inclined portion 21 side, the outer diameter gradually increases toward the center side is formed convex in the first convex portion (32). In addition, a first recess 38 in which the outer diameter of the coupling part 31 is sharply reduced is formed at the central part where the blocking film part 35 is formed. Similarly, the second convex portion 33 is in contact with the second inclined portion 23, and the outer diameter and outer diameter of the second inclined portion 23 are formed to be the same, and the second convex portion 33 is formed to be convex toward the central portion. The second recess 39 is formed at the portion where the blocking layer 35 is formed. Thus, a smooth smooth curved surface leading to the first inclined portion 21, the first convex portion 32, and the first concave portion 38 is formed, and the second concave portion 39 with the blocking film portion 35 interposed therebetween. , A smooth curved surface extending to the second convex portion 33 and the second inclined portion 23 is formed.

The liquid blocking member 30 must satisfy several functions. That is, when the trocar is inserted into the patient's body, it should not be disturbed by smooth bending, and should not be released from the cannula 20. In addition, it should be possible to restore the original state from being inserted into the patient's body.

Since the first concave portion 38 and the second concave portion 39 are formed at the boundary between the blocking film portion 35 and the coupling portion 31, the blocking film portion 35 is easily bent. Therefore, it can be easily flipped through a narrow hole formed in the patient's body and can be easily restored through the hole. In addition, since the first inclined portion 21 and the first convex portion 32 have a smoothly extending curved surface, and the coupling portion 31 is formed in a wide ring band shape and is embedded in the groove portion 37, it is inserted into the patient's body. When the frictional resistance is reduced to minimize the burden on the patient's body and the liquid blocking member 30 may not be separated from the cannula (20).

Hereinafter, a process of inserting the thoracic trocar into the chest wall of the patient will be described with reference to FIGS. 4 to 7.

First, a hole (H) is formed in the chest wall of the patient prior to inserting the thoracic trocar. As shown in Figure 4 the chest wall is protected by a number of ribs (R). Multiple long ribs (R) block external shocks to protect key organs such as the lungs and heart. In order to minimize the burden on the patient, it is better to form a hole (H) between the ribs (R) and ribs (R). Since the gap between the ribs (R) and ribs (R) is not very wide, the thoracic trocar is usually manufactured to a size that can fit between these gaps. The hole is made of a pointed metal made of a trocar and can be formed directly using a trocar, but a hole (H) is formed by another surgical tool, and a trocar is inserted into an already drilled hole (H).

A user such as a doctor grasps the handle 19 and inserts the trocar into the chest cavity of the patient as shown in FIGS. Since the trocar is inserted through the narrow gap between the ribs R of the patient, the trochler liquid blocking member 30 is turned upside down in this process and is in close contact with the outer wall of the cannula 20. Since the first convex part 32, the first concave part 38, the second concave part 39, and the second convex part 33 are formed in the liquid blocking member 30, the blocking membrane part 35 is easily folded to form a cannula ( 20 may be in close contact with the outer wall and may not be detached from the cannula 20. When the cannula 20 is extracted from the patient's body after the operation, the liquid blocking member 30 having the first concave portion 38 is easily folded, that is, the blocking portion 35 is the coupling portion 31 and the cannula ( 20) can be folded into a position in close contact with the outer surface of the patient so that the body of the patient can be prevented and the liquid blocking member 30 can be prevented from being separated from the cannula 20.

As shown in FIG. 6, since the liquid blocking member 30 is a material having elasticity such as silicone resin, when the trocar is completely inserted into the chest cavity, the blocking membrane part 35 may be unfolded again. In this case, as shown in FIG. 3, since the first recess 38 is formed in the liquid blocking member 30, it may be easily unfolded. The first concave portion 38 and the second concave portion 39 are formed, and since the thickness of the blocking membrane portion 35 becomes thinner and elastic toward the outside, the blocking membrane portion 35 can be easily folded and unfolded.

When the trocar is inserted into the thoracic cavity, as shown in FIG. 7, the trocar 10 may be removed and the endoscope E may be inserted through the internal hole of the cannula 20. Since the inner surface of the cannula 20 and the outer surface of the trocar 10 are slidably coupled, the trocar 10 can be easily extracted by pulling the handle 19. Endoscopy (E) as well as surgical tools for surgery such as resection or suture can come and go through this cannula (20). Since the cannula 20 is inserted, the surgical tool does not have to physically irritate or force the hole H of the patient's chest wall every time the insertion and extraction of the surgical tool is performed. Since the cannula 20 creates a guide tube of a constant size, the endoscope and the surgical tool can be moved in and out. During the operation, the cannula 20 is inserted through the chest wall of the patient and can be removed when the operation is completed to eliminate the need for an endoscope E or a surgical tool.

As shown in FIG. 7, when the hole H is drilled in the chest wall of the patient, blood B accumulates in the hole. Such a blood (B) or other liquids from the body of the patient flows down the cannula 20 to the endoscope (E) a lot of cases occur. Blood B on the camera end of the endoscope E makes it difficult for the operator to visually identify the patient's organs. However, the thoracic trocar according to the embodiment of the present invention prevents the liquid blocking member 30 from flowing liquid such as blood B to surgical instruments such as endoscopes. This is because the cannula 20 is not formed smoothly and the liquid blocking member 30 is installed so as to bypass the flowing liquid to the outside, like an umbrella. Since the blocking membrane part 35 is formed convexly, the cannula 20 can block the liquid flowing down at any angle as well as when the cannula 20 is fitted approximately parallel to the ground. In addition, as shown in FIG. 2, when the outer diameter of the blocking membrane portion 35 is formed to about twice the outer diameter of the cannula 20, the liquid blocking effect may be sufficient and may not compress the chest wall of the patient.

As described above, embodiments of the present invention have been described, but those skilled in the art may add, change, delete, or add elements within the scope not departing from the spirit of the present invention described in the claims. The present invention may be modified and changed in various ways, etc., which will also be included within the scope of the present invention.

10; Trocar 20; Cannula
30; Liquid blocking member 31; Joint
35; Blocking film

Claims (5)

delete A cylindrical cannula, a trocar inserted into the cannula, and a liquid blocking member installed on an outer circumferential surface of the cannula,
Grooves are formed on the outer circumferential surface of the cannula in the circumferential direction, and the liquid blocking member is fixed to the grooves.
On both sides of the groove portion of the cannula is formed an inclined portion that gradually increases in outer diameter in the direction of the groove portion,
The liquid blocking member includes a coupling portion installed in the groove portion and an outer portion extending from the coupling portion, and a soft blocking membrane portion integrally formed with the coupling portion.
The blocking membrane portion is formed convexly like an umbrella, the thoracic trocar characterized in that the thickness is formed to decrease toward the outer side from the coupling portion. The method of claim 2,
The coupling portion is formed in a ring band shape,
The surface of the inclined portion and the coupling portion is a thoracic trocar, characterized in that to form a curved surface. The method of claim 2,
Thoracic trocar for the thoracic cavity characterized in that the concave portion is formed in the portion where the blocking membrane portion meets the coupling portion is rapidly reduced the outer diameter of the coupling portion to be easily flipped. delete

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