Medical suction tip and suction tube with medical suction tip

Abstract

The present invention relates to a medical suction tip for aspirating and discharging body fluids and cleaning fluids exuded during surgery on living tissue. [Solution] The present invention provides a medical suction tip with a suction part and a connecting part, which has a groove at the tip to prevent clogging and a side hole near the end. When the suction tip is connected to one end of a flexible suction tube and the other end is connected to a medical suction device and driven under negative pressure, the suction tip has excellent fixation to the biological tissue at the surgical site, eliminating the need to switch the surgical device to the suction tube during surgery.

Description

[Technical Field]

[0001] The present invention relates to a medical suction tip for aspirating and discharging body fluids and irrigation fluids exuded during surgery on living tissue, and particularly to a medical suction tip suitable for robotic surgery and microsurgery. [Background technology]

[0002] Conventionally, in order to aspirate and remove body fluids and cleaning fluids that leak into the surgical field during surgical operations, a method has been adopted in which a suction cannula with a hole at the tip is connected to an external suction device via a suction tube circuit, and the fluids are removed by suction (e.g., Patent Document 1, Patent Document 2). In addition, in laparoscopic surgery using a surgical support robot, a suction instrument has been proposed in which a porous material such as gauze or sponge is provided at the tip of a suction tube to prevent the suction tube from interfering with and damaging tissue (Patent Document 3). Furthermore, in microsurgery, an ultra-fine surgical procedure that involves the skillful use of needles and threads thinner than a hair and tweezers to hold them, advanced techniques are performed through a microscope, such as anastomosis of lymphatic vessels and veins smaller than 0.5 mm, and tissue transplants.In such operations, the surgeon's hands are stopped to use suction tubes or gauze to irrigate the surgical field and to aspirate exuding bodily fluids in order to ensure a clear view. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2000-354624 [Patent Document 2] Jipkaihei 5-88552 [Patent Document 3] Patent Publication No. 2024-119780 Summary of the Invention [Problem to be solved by the invention]

[0004] Microsurgery requires a narrow surgical field, so it can be difficult to insert a normal suction tube into the surgical field because it is too large or lacks flexibility. If a large suction tube is left in the surgical field, it not only interferes with the surgical procedure but also poses the risk of damaging biological tissue. Therefore, when performing surgical procedures, the instruments are left outside the surgical field, and when suctioning and removing exudates and irrigation fluid from the surgical field, the surgical instruments are switched to suction tubes for suction. However, when switching, the surgeon must look away from the surgical site, which contains tiny lymphatic vessels and blood vessels, which disrupts the continuity of the surgery and requires extra effort to maintain concentration. If lymphatic fluid continues to overflow from the incision, it can interfere with the operation, prolonging the operation time and making the procedure more complicated. Furthermore, the suction section of a conventional suction tube may have multiple side holes on the side wall of the tip of the suction tube, in addition to a suction port at the tip. However, if the suction holes are clogged with biological tissue fragments from the surgical site, or if the holes are too large or there are too many of them, air may be sucked in through holes that do not contribute to suction, reducing the suction force and preventing continuous suction.

[0005] The present invention aims to solve the above problems and to provide a medical suction tip that can continuously aspirate and discharge body fluids and irrigation fluids that exude from living tissue during surgery without having to stop the surgery. The present invention also relates to a suction tube that has the medical suction tip at its tip and is used by connecting to a medical suction device. [Means for solving the problem]

[0006] These objects can be achieved by the present invention as set forth in (1), (3) to (8), and (10) to (15) below.

[0007] (1) A substantially straight suction portion having a suction portion front end, a suction portion rear end, an outer surface, and an suction portion inner cavity, and a substantially straight connecting portion having a connecting portion front end, a connecting portion rear end, an outer surface, and an inner cavity; the rear end of the suction portion and the front end of the connection portion are continuous, the lumen of the suction portion and the lumen of the connection portion are continuous, and the lumen of the suction portion and the lumen of the connection portion have the same longitudinal axis; The tip of the suction unit is Extends in two directions in a plane perpendicular to the longitudinal axis of the suction portion lumen, have tip grooves that intersect with each other and open to the tip side, The width of the tip groove is smaller than the diameter of the suction lumen at the tip of the suction part, and is 0.1 mm to 1 mm, and the depth is 0.3 mm to 2 mm; the suction part has three to six side holes penetrating from the outer surface of the suction part to the lumen of the suction part; The total opening area of ​​the side holes on the outer surface of the suction portion is 0.21 mm 2 to 4.71 mm 2 and the outer surface of the connection portion and the outer surface of the suction portion are connected by a step portion, and the outer surface of the connection portion has a convex portion that is continuous in the circumferential direction and protrudes outward, the length of the suction part in the longitudinal axis direction is 4 mm to 35 mm, the length of the connection part in the longitudinal axis direction is 5 mm to 13 mm, the diameter of the tip of the suction part lumen is 0.5 mm to 3.5 mm, and the difference between the maximum diameter of the outer surface of the suction part in a plane perpendicular to the longitudinal axis in a region of the suction part where there are no side holes and the diameter of the suction part lumen is 1.2 mm to 2.5 mm, The maximum diameter of the outer surface of the suction part is larger than the diameter of the outer surface of the connection part, and the total weight of the suction part and the connection part is 0.3 g to 4.5 g; One end of a flexible tube is fitted onto the outer surface of the connecting portion, and the other end of the flexible tube is connectable to a medical suction device; When the device is connected to a medical suction device via the flexible tube and driven under negative pressure, the tip of the suction part adheres to the living tissue, thereby maintaining fixation to the living tissue. A medical suction tip characterized by:

[0009] (3) The medical suction tip according to (1), characterized in that the diameter of the connection portion lumen is the same as or larger than the diameter of the suction portion lumen, the diameter of the suction portion lumen is larger at the rear end of the suction portion than at the front end of the suction portion, the diameter of the front end of the suction portion lumen is 0.6 mm to 3.5 mm, and the diameter of the rear end of the connection portion lumen is 0.8 mm to 4 mm.

[0010] (4) The medical suction tip according to (1) above, characterized in that it has a linking means for anchoring the medical tip in the surgical field or holding it in another device.

[0011] (5) The medical suction tip according to (4), characterized in that the linking means is a tethering member having a fixing part that can be fixed to the suction tube or the suction tip and a locking part that is used to tether it to the surgical field.

[0012] (6) The medical suction tip according to (5), wherein the anchoring member has an insertion portion through which the suction tube or the suction tip is inserted and the anchoring portion through which the needle body can be pierced.

[0013] (7) The medical suction tip according to (4), characterized in that the linking means is a held member having a fixing part that can be fixed to the suction tube or the suction tip and a holding part that can hold the other device.

[0014] (8) A medical suction tip having a substantially straight suction portion having a suction portion front end, a suction portion rear end, an outer surface of the suction portion, and an inner cavity of the suction portion, and a substantially straight connecting portion having a connecting portion front end, a connecting portion rear end, an outer surface of the connecting portion, and an inner cavity of the connecting portion; a flexible tube having one end fitted to the outer surface of the connecting portion and the other end having a suction device connector connectable to a medical suction device; the rear end of the suction portion and the front end of the connection portion are continuous, the lumen of the suction portion and the lumen of the connection portion are continuous, and the lumen of the suction portion and the lumen of the connection portion have the same longitudinal axis; The tip of the suction unit is Extends in two directions in a plane perpendicular to the longitudinal axis of the suction portion lumen, have tip grooves that intersect with each other and open to the tip side, The width of the tip groove is smaller than the diameter of the suction lumen at the tip of the suction part, and is 0.1 mm to 1 mm, and the depth is 0.3 mm to 2 mm; the suction part has three to six side holes penetrating from the outer surface of the suction part to the lumen of the suction part; The total opening area of ​​the side holes on the outer surface of the suction portion is 0.21 mm 2 to 4.71 mm 2 and the outer surface of the connection portion and the outer surface of the suction portion are connected by a step portion, and the outer surface of the connection portion has a convex portion that is continuous in the circumferential direction and protrudes outward, the length of the suction part in the longitudinal axis direction is 4 mm to 35 mm, the length of the connection part in the longitudinal axis direction is 5 mm to 13 mm, the diameter of the tip of the suction part lumen is 0.5 mm to 3.5 mm, and the difference between the maximum diameter of the outer surface of the suction part in a plane perpendicular to the longitudinal axis in a region of the suction part where there are no side holes and the diameter of the suction part lumen is 1.2 mm to 2.5 mm, The maximum diameter of the outer surface of the suction part is larger than the diameter of the outer surface of the connection part, and the total weight of the suction part and the connection part is 0.3 g to 4.5 g; When the device is connected to a medical suction device via the flexible tube and driven under negative pressure, the tip of the suction part adheres to the living tissue, thereby maintaining fixation to the living tissue. A medical suction tube characterized by:

[0016] (10) A medical suction tube according to (8), characterized in that the diameter of the connection portion lumen is the same as or larger than the diameter of the suction portion lumen, the diameter of the suction portion lumen is larger at the rear end of the suction portion than at the front end of the suction portion, the diameter of the front end of the suction portion lumen is 0.6 mm to 3.5 mm, and the diameter of the rear end of the connection portion lumen is 0.8 mm to 4 mm.

[0017] (11) A medical suction tube according to (8), characterized in that it has a linking means for anchoring the vicinity of the medical suction tip of the suction tube or at least a part of the medical suction tip to the surgical field or for holding it to another device.

[0018] (12) A medical suction tube according to (11), characterized in that the linking means is a tethering member having a fixing portion that can be fixed to the suction tube or the suction tip and a locking portion used for tethering to the surgical field.

[0019] (13) The medical suction tube according to (12), wherein the anchoring member has an insertion portion through which the suction tube or the suction tip is inserted and the anchoring portion through which the needle body can be pierced.

[0020] (14) The medical suction tube described in (11), characterized in that the linking means is a held member having a fixing portion that can be fixed to the suction tube or the suction tip and a holding portion that can be held by the other device.

[0021] (15) A substantially straight suction portion having a suction portion front end, a suction portion rear end, an outer surface of the suction portion, and an inner lumen of the suction portion; and a substantially straight connecting portion having a connecting portion front end, a connecting portion rear end, an outer surface of the connecting portion, and an inner lumen of the connecting portion; the rear end of the suction portion and the front end of the connection portion are continuous, the lumen of the suction portion and the lumen of the connection portion are continuous, and the lumen of the suction portion and the lumen of the connection portion have the same longitudinal axis; The tip of the suction part has tip grooves that intersect with each other and open to the tip side, The width of the tip groove is smaller than the diameter of the suction lumen at the tip of the suction part, and is 0.1 mm to 1 mm, and the depth is 0.3 mm to 2 mm; the suction part has three to six side holes penetrating from the outer surface of the suction part to the lumen of the suction part; The total opening area of ​​the side holes on the outer surface of the suction portion is 0.21 mm 2 to 4.71 mm 2 and the outer surface of the connection portion and the outer surface of the suction portion are connected by a step portion, and the outer surface of the connection portion has a convex portion that is continuous in the circumferential direction and protrudes in a direction away from the longitudinal axis, a medical suction tip characterized in that the length of the suction part in the longitudinal direction is 4 mm to 35 mm, the length of the connection part in the longitudinal direction is 5 mm to 13 mm, the diameter of the tip of the suction part lumen is 0.5 mm to 3.5 mm, the difference between the maximum diameter of the outer surface of the suction part and the diameter of the suction part lumen in a plane perpendicular to the longitudinal axis in an area of ​​the suction part where there are no side holes is 1.2 mm to 2.5 mm, the maximum diameter of the outer surface of the suction part is larger than the diameter of the outer surface of the connection part, and the total weight of the suction part and the connection part is 0.25 g to 4.5 g. [Effects of the Invention]

[0022] The present inventions (1), (3) to (8), and (10) to (15) above have excellent fixation properties to biological tissues in a decompression-driven state, and therefore can maintain a fixed state on the biological tissues, eliminating the need to stop surgery when aspirating or discharging body fluids or irrigation fluids that ooze out during surgery on the biological tissues. Furthermore, the present invention allows for continuous aspirating and discharging of body fluids or irrigation fluids that ooze out during surgery on the biological tissues. Furthermore, the present invention allows for fixation to the biological tissues or their surroundings when aspirating or discharging body fluids or irrigation fluids that ooze out during surgery on the biological tissues. [Brief explanation of the drawings]

[0023] [Figure 1] 1A and 1B are diagrams showing an embodiment of a medical suction tube of the present invention. [Figure 2] FIG. 10 is a schematic diagram showing how, when a medical suction tube having a medical suction tip of the present invention is applied to biological tissue, connected to a medical suction device (not shown) and driven under negative pressure, the tip of the suction part adheres to the biological tissue, thereby maintaining fixation. [Figure 3] 3A to 3C are a front view (FIG. 3-1), a side view (FIG. 3-2), and a cross-sectional view (FIG. 3-3) of one embodiment of the medical suction tip of the present invention. [Figure 4] 4A to 4C are a front view (FIG. 4-1), a side view (FIG. 4-2), and a cross-sectional view (FIG. 4-3) of another embodiment of the medical suction tip of the present invention. [Figure 5] FIG. 1 is a schematic diagram of an embodiment of the medical suction tube of the present invention having a tether member as a linking means, showing the needle body of the fishhook-type hook being pierced. [Figure 6] 10 is a schematic diagram of another embodiment of a tether that can be combined with the medical suction tube of the present invention. FIG. [Figure 7] 7A and 7B are a side view and a combined view of a held member and a suction tip, respectively, as a cooperation means of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] The present invention has the above-described features, and the medical suction tip and medical suction tube of the present invention will be described in detail below. Note that the following embodiments do not limit the invention according to the claims. Although the embodiments describe multiple features, not all of these multiple features are necessarily essential to the present invention. Fig. 1 is a diagram showing the configuration of one embodiment of the medical suction tube of the present invention. As shown in Fig. 1, the medical suction tube 1 of the present invention has an apparatus-side connector 3 for connecting to a medical suction device (not shown), a suction tube 4, and a medical suction tip 2 (hereinafter referred to as the suction tip). The device side connector 3 only needs to be connectable to the pressure reduction port of the medical suction device, and various device side connectors can be prepared to connectably adapt to the shapes of the pressure reduction ports of different medical suction devices, or various adapters adapted to connectable to the pressure reduction port can be used. The suction tube 4 is made of a flexible tube and can be connected to both the device-side connector 3 and the suction tip 2. However, if it is not crushed by the reduced pressure for suction and is used in a narrow or deep surgical field in microsurgery, a tube hardness of 60° or less is preferable. The tube hardness is more preferably 20° to 50°. Suitable materials for the suction tube 2 include silicone, polyurethane, and olefin-based elastomers. The outer diameter of the suction tube 4 is preferably 1.5 to 5.5 mm, more preferably 2.5 to 4.0 mm, and the inner diameter is preferably 0.8 to 5.0 mm, more preferably 1.8 to 3.2 mm. If the suction tube 4 is too hard, external force applied to the suction tube 4 will be transmitted to the suction tip 2, making it more likely for the suction tip 2 to move.

[0025] 2 is a schematic diagram showing how, when a medical suction tube 1 having a suction tip 2 is applied to biological tissue and connected to a medical suction device (not shown) and driven under negative pressure, the suction tip 110 adheres to the biological tissue, thereby maintaining fixation to the biological tissue. Medical suction devices include those connected via a liquid trap to a suction source installed at the bedside as part of the medical gas piping system in a medical facility, and those in independent configurations combining an electric pump and a liquid trap. These devices are driven at a reduced pressure level of approximately -40 to -70 kPa. When such a medical suction device is used in a surgical field on a living body, the suction tube 1 having a suction tip 2 of the present invention adheres to the surface of the biological tissue in the surgical field, as shown in FIG. 2, and despite the connection of the suction tube 4, the suction tip 2 remains fixed to the biological tissue, and the device can maintain an upright position when placed on flat biological tissue. The suction tip 2 adheres to the biological tissue, maintaining its fixation while continuing to aspirate exudates and irrigation fluid from the surrounding tissue, eliminating the need to switch surgical instruments to a suction tube for liquid aspiration. This eliminates the need to take one's eyes off the surgical site, which contains minute lymphatic vessels and blood vessels, allowing the surgeon to maintain concentration on the surgery even when lymphatic fluid is continuously overflowing. Furthermore, the suction tip 2 can be positioned precisely even in surgeries with a narrow surgical field.

[0026] FIG. 3 shows a front view (FIG. 3-1), a side view (FIG. 3-2), and a cross-sectional view of the PP surface (FIG. 3-3) of one embodiment of the medical suction tip of the present invention. The suction tip 2 has a substantially straight suction portion 100 having a suction portion front end 110, a suction portion rear end 120, a suction portion outer surface 101, and a suction portion inner lumen 102, and a substantially straight connection portion 200 having a connection portion front end 210, a connection portion rear end 220, a connection portion outer surface 201, and a connection portion inner lumen 202. The length A of the suction portion 100 is preferably 4 to 45 mm, more preferably 6 to 35 mm. The length B of the connection portion 200 is preferably 5 to 15 mm, more preferably 6 to 13 mm. Here, "substantially straight" means that even if there are some external irregularities, it is recognized as having a straight central axis as a whole.

[0027] The suction portion rear end 120 and the connection portion distal end 210 are continuous. The suction portion lumen 102 and the connection portion lumen 202 form a continuous cavity. The suction portion lumen 102 and the connection portion lumen 202 share the same longitudinal axis 300. The diameter of the suction portion lumen 102 at the suction portion distal end 110 and the diameter of the connection portion lumen 202 at the connection portion rear end 220 are substantially identical. The diameter D of the suction portion lumen 102 at the suction portion distal end 110 is preferably 0.5 to 3.5 mm, more preferably 0.6 to 3.0 mm. The suction portion 100 and the connection portion 200 of this embodiment can be formed as a single unit by cutting from a single piece of material, or by metal 3D printing, lost wax casting, or metal injection molding. Here, "substantially identical" does not necessarily mean completely identical, but rather includes variations and errors that may occur during the manufacturing process. This term also applies mutatis mutandis to dimensions below.

[0028] The suction unit distal end 110 is formed with distal end grooves (103a, 103b) that intersect with each other near the end of the suction unit lumen 102 and open to the distal end. The two intersecting distal end grooves (103a, 103b) extend in two directions on a plane perpendicular to the longitudinal axis 300. The smaller of the intersection angles is preferably 60° to 90°. The width E of the distal end grooves (103a, 103b) is preferably 0.1 to 1 mm, more preferably 0.3 to 0.65 mm, and the depth F is preferably 0.3 to 2 mm, more preferably 0.5 to 1.0 mm. The presence of the distal end grooves can prevent the entire distal opening of the suction unit lumen 102 from being blocked when biological tissue is sucked therein.

[0029] The maximum diameter C of the suction portion outer surface 101 in a plane perpendicular to the longitudinal axis 300 is preferably 2.0 to 5.5 mm, and more preferably 2.5 to 5.0 mm. The difference between the maximum diameter C (the maximum diameter of the suction portion outer surface 101 in a plane perpendicular to the longitudinal axis 300 in an area where the suction portion 100 does not have side holes 104) and the diameter D (the diameter of the suction portion lumen 102 of the suction portion tip 110) is preferably 1.2 to 2.5 mm, and more preferably 1.5 to 2.0 mm.

[0030] The suction unit 100 has three to six side holes 104 penetrating from the suction unit outer surface 101 to the suction unit inner cavity 102. Preferably, four side holes 104 are provided. Furthermore, the side holes 104 are preferably provided at equal angular intervals around a circle centered on the longitudinal axis 300 in a plane perpendicular to the longitudinal axis 300. Furthermore, it is preferable that at least one of the side holes 104 is located at a different distance from the suction unit tip 110 than the other side holes 104. It is preferable that the center position of the opening of each side hole 104 is located closer to the tip of the suction part 100 than the central position in the longitudinal axis direction, and it is also preferable that it is located within 5 mm of the tip 110 of the suction part, and more preferably within 4 mm. The diameter of each side hole 104 is preferably 0.3 to 1.0 mm, and more preferably 0.5 to 0.7 mm. The diameter of the side hole 104 is preferably substantially the same from the suction portion outer surface 101 to the suction portion lumen 102. The diameter of the side hole 104 is preferably smaller than the diameter D of the suction portion lumen 102 at the suction portion tip 110. The sum of the areas of the openings 106 of all the side holes 104 on the suction portion outer surface 101 is preferably 0.21 to 4.71 mm. 2 and more preferably 0.59 to 2.31 mm 2 By configuring the side holes 104 as described above, the end of the suction portion lumen 102 and the side holes 104 are not blocked by the biological tissue adhering thereto, and exudate and cleaning solution present on the surface of the biological tissue can be aspirated. Furthermore, the suction tip 2 adheres to the biological tissue, maintaining its fixation to the biological tissue while continuing to aspirate exudate and cleaning solution from the surrounding tissue, and also reducing the possibility of clogging of the suction tip 2 due to tissue fragments or the like interfering with suction. When the biological tissue is flat, the suction tip 2 can continue to aspirate exudate and cleaning solution while maintaining its upright position.

[0031] The connection portion outer surface 201 and the suction portion outer surface 101 are connected by a step portion 150. The suction portion 100 and the connection portion 200 share a longitudinal axis 300, and the maximum diameter of the suction portion outer surface 101 is larger than the diameter of the connection portion outer surface 201. The step portion 150 is a step that occurs due to the difference in size between the connection portion outer surface 201 at the connection portion tip portion 210 and the suction portion outer surface 101 at the suction portion rear end portion 120. The difference between the maximum diameter of the suction part outer surface 101 in a plane perpendicular to the longitudinal axis 300 of the region of the suction part 100 without the side holes 104 and the diameter of the suction part inner cavity 104 is preferably 1.2 to 2.5 mm, more preferably 1.5 to 3.0 mm.

[0032] The connecting portion outer surface 102 has at least one protrusion 204 that is continuous in the circumferential direction and protrudes outward. The top of the protrusion 204 protrudes at substantially the same height in the circumferential direction. In other words, since the protrusion 204 protrudes continuously in the circumferential direction from the connecting portion outer surface 201, high liquid-tightness can be obtained when the suction tube 4 is connected. It is preferable that multiple protrusions 204 are provided at different distances from the connecting portion rear end 220. One end of a flexible suction tube 4 is fitted into the connecting portion outer surface 201, and the other end of the suction tube 4 is connected to the device-side connector 3.

[0033] The total weight of the suction tip 2, including the suction portion 100 and the connection portion 200, is preferably 0.25 to 4.5 g, and more preferably 0.3 to 3.0 g. By setting the weight within an appropriate range, the suction tip 2 can be easily submerged in the exudate or cleaning solution of biological tissue under its own weight, making it easy to handle, so that the suction tip 2 can be placed in an appropriate position in the surgical field. Furthermore, if the suction tip 2 is lighter than this, it will be more likely to move and move away from the desired position. The material of the suction tip 2 is preferably stainless steel or brass plated with nickel or chromium. The outer surface of the suction tip 2 can be coated with an insulating material such as resin, which prevents electrical leakage even when it comes into contact with an electric scalpel used in surgery. In addition, the outer surface of the suction tip can be blasted or textured to prevent it from slipping when lying down. Furthermore, the surfaces of the suction portion lumen 102 and the connection portion lumen 202 can be mirror-polished, water-repellent, or fluorine-coated, etc. This improves the sliding properties of the lumen, allowing suction to be performed without clogging with cutting chips from the scalpel incision.

[0034] 4 shows a front view (FIG. 4-1), a side view (FIG. 4-2), and a cross-sectional view (FIG. 4-3) of another embodiment of the medical suction tip of the present invention. In describing this embodiment, the same components as those in the suction tip 2 are designated by the same numbers, and only the components different from those in the suction tip 2 will be described below. The suction tip 5 of this embodiment differs from the suction tip 2 of the above embodiment in that the suction portion inner cavity 152 and the connection portion inner cavity 252 increase in diameter from the suction portion front end 110 to the connection portion rear end 220. The suction tip 5 has a substantially straight suction portion 400 having a suction portion front end 410, a suction portion rear end 420, a suction portion outer surface 101, and a suction portion inner lumen 402, and a substantially straight connecting portion 500 having a connecting portion front end 410, a connecting portion rear end 420, a connecting portion outer surface 201, and a connecting portion inner lumen 502. The diameter G of the suction portion lumen 402 at the suction portion distal end 410 is smaller than the diameter H of the connection portion lumen 502 at the connection portion rear end 520, and the suction portion has a tapered shape that expands in diameter from the suction portion distal end 410 toward the connection portion rear end 520. The diameter G is preferably 0.6 to 3.5 mm, more preferably 0.8 to 2.5 mm. The diameter H is preferably 0.8 to 4.0 mm, more preferably 1.0 to 3.5 mm. The ratio of the diameter H to the diameter G is preferably 1:1.1 to 1:1.3, more preferably 1:1.23 to 1:1.35. With this configuration, the suction tip 5 of the present invention can reduce the likelihood of clogging of the suction portion lumen 402 and the connection portion lumen 502 by biological tissue fragments, etc.

[0035] Fig. 5 is a schematic diagram of an embodiment of the medical suction tube of the present invention having a tether as a linking means, in which the needle of the fishhook-type hook is pierced through the locking portion. Fig. 6 is a schematic diagram of another example of a tether that can be combined with the medical suction tube 1 of the present invention. The anchoring member 600 is one embodiment of the linking means of the present invention, and has a fixing part 610 that can be fixed to the suction tube 4 or the suction tip 2, and a locking part 620 that positions the anchoring member 600 in the surgical field. The fixing part 610 has an insertion hole 612 through which the suction tube 4, the connection part 200, and the suction part 100 are inserted. The anchoring member 600 is made of an elastic resin material such as rubber or elastomer, which is radiopaque, and the insertion hole 612 of the fixing part 610 elastically expands in diameter, allowing the suction tube 4 or the suction tip 2 to be inserted therethrough. Furthermore, the locking part 620 is also made of an elastic resin material, allowing the needle body of the fishhook hook to be pierced. In FIG. 5 , a fishhook hook 700, which is made of a needle body 710 and a locking thread 730 for pulling the needle body 710, is used. The needle body 710 is inserted into the locking part 620, and the locking thread 730 is locked to the periphery of the surgical field (not shown), allowing the suction tube 4 near the suction tip or the suction tip 2 to be anchored at a desired position in the surgical field.

[0036] While the fixing part 610 of the anchoring member 600 in Fig. 5 is an insertion hole, the anchoring member 650 in Fig. 6 has a notch 664 in part of the insertion hole 662 of the fixing part 660, through which the suction tube 4 or the suction tip 2 can be inserted, or alternatively, the elasticity of the material of the anchoring member 650 can be utilized to fit the anchoring member 650 in place. The anchoring member 650 has a locking part 670 for positioning the anchoring member 650 in the surgical field.

[0037] FIG. 7 shows a side view (FIG. 7-1) of one embodiment of a held member as a linking means of the present invention, and a combined view (FIG. 7-2) of the held member and a suction tip. The held member 800 is fixed to the suction tip 2 by abutting the fixing portion 810 against the step portion 150 between the suction portion 100 and the connection portion 200 of the suction tip 2 of the present invention and fitting the suction tube 2 into the connection portion 200. The held member 800 has a holding portion 820 that extends outward from the suction tip 2 and further extends along the suction tip. The held portion 800 of the present invention can be made of hard plastic or metal. In particular, the holding portion 820 is preferably made of metal because it will be gripped by a metal device such as forceps or tweezers.

[0038] The linking means of the present invention is not limited to the above, and may be any means capable of anchoring the medical chip of the present invention in the surgical field or holding it in another device. The anchoring member of the present invention is used to anchor the vicinity of the suction tip of the suction tube of a medical suction tube or at least a part of the suction tip to another device such as the fishhook-type hook, and therefore may have a fixing part that fixes the vicinity of the suction tip of the suction tube or the suction tip, and an engaging part that engages with the other device. Furthermore, because bleeding and bodily fluids can come out from all directions, the holdable member of the present invention is particularly effective when moving the suction tip during surgery. The suction tip is moved by grasping it with tweezers or forceps, but even if the suction tip is grasped tightly with forceps, by providing an appropriate holdable member that is held by a surgical device such as forceps so as not to damage the suction tip or suction tube, surgery can be performed safely. Other devices include general surgical instruments such as hooks and forceps used in surgery, endoscopic surgery such as laparoscopy and thoracoscope, and robotic forceps used in robot-assisted surgery.

[0039] Example 1 The suction tube shown in Figure 1 was created using the suction tip and suction tube of the following sizes. As a model of biological tissue, chicken thigh meat for eating was placed in a tray filled with physiological saline, and the created suction tube was placed in a suction state at a pressure of -40 kPa. The suction tube was grasped and the end of the suction tip was placed on the thigh meat in the saline solution. Physiological saline was aspirated from the tip of the suction tip, and the suction tube was only connected to the medical suction device and was not supported by anything else. The suction tube of this example maintained fixation to the thigh meat while continuing to suction through the distal opening and side holes of the suction tip. Furthermore, even when the amount of saline solution decreased and the side hole farthest from the thigh became exposed, the device continued to suction the surrounding saline solution while maintaining its fixation to the thigh, and even when the saline solution had disappeared from above the thigh, it maintained its fixation to the thigh.When the tip of the suction tip was attached to the flat part of the thigh, the upright position was maintained as shown in Figure 2. (suction tube) Tube hardness: 50°, Material: Silicone, Suction tube outer diameter: 2.5mm, inner diameter: 1.5mm (Suction tip) Length of suction part A: 8.5mm, Length of connection part B: 7.0mm Diameter of the suction lumen at the tip of the suction part: D: 1.0 mm Intersection angle of tip groove: 90°, width E of tip groove: 0.65 mm, depth F: 1 mm Maximum diameter C of the outer surface of the suction part: 2.5 mm, difference between maximum diameter C and diameter D: 1.5 mm Diameter of each side hole: 0.65mm, Center position of each side hole: Two holes facing each other at a position 3 mm from the tip of the suction part, and two holes facing each other at a position 4 mm from the tip of the suction part, at a 90° angle from the previous side holes Total area of ​​side hole openings: 5.3 mm 2 Total weight of suction tip: 0.38g, Material: Chrome plated brass

[0040] Example 2 The same preparation as in Example 1 was carried out except for the following dimensions, and the same evaluations were carried out, and the results were similar. Diameter of the suction lumen at the tip of the suction part: G: 0.8 mm, Diameter H of the connection lumen at the rear end of the connection: 1.0 mm Difference between maximum diameter C and diameter G: 1.7 mm The ratio of the diameter H to the diameter G is 1:1.25

[0041] The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above, and also includes inventions that are modified within the scope of the present invention and inventions equivalent to the present invention. [Explanation of symbols]

[0042] 1 Medical suction tube 2 Medical suction tips 3 Device side connector 4 suction tubes 5 Medical suction tips 100 Suction part 101 External surface of suction part 102 Suction section lumen 103, 103a, 103b Tip groove 104 Side hole 106 Side hole opening 110 Suction part tip 120 Rear end of suction section 200 Connection 201 Outer surface of connection 202 Connection lumen 204 Convex 210 Connection tip 220 Rear end of connection 300 Longitudinal axis 400 Suction part 402 Suction section lumen 410 Suction part tip 420 Rear end of suction section 500 Connection 502 Connection lumen 510 Connection tip 520 Rear end of connection 600 Mooring member 610 Fixed part 612 Insertion hole 620 Locking part 650 Mooring members 660 Fixed part 662 Insertion hole 664 Notch 670 Locking part 700 Fish Hook 710 Needle body 730 Retaining thread 800 Held member 810 Fixed part 820 Holding part

Claims

1. a substantially straight suction portion having a suction portion front end, a suction portion rear end, a suction portion outer surface, and a suction portion inner lumen; and a substantially straight connection portion having a connection portion front end, a connection portion rear end, a connection portion outer surface, and a connection portion inner lumen; the rear end of the suction portion and the front end of the connection portion are continuous, the lumen of the suction portion and the lumen of the connection portion are continuous, and the lumen of the suction portion and the lumen of the connection portion have the same longitudinal axis; the distal end of the suction unit has distal grooves extending in two directions in a plane perpendicular to the longitudinal axis of the lumen of the suction unit, intersecting each other and opening to the distal end, The width of the tip groove is smaller than the diameter of the suction lumen at the tip of the suction part, and is 0.1 mm to 1 mm, and the depth is 0.3 mm to 2 mm; the suction portion has three to six side holes penetrating from the outer surface of the suction portion to the lumen of the suction portion; the total opening area of ​​the side holes on the outer surface of the suction portion is 0.21 mm 2 to 4.71 mm 2 ; the outer surface of the connection portion and the outer surface of the suction portion are connected by a step portion, and the outer surface of the connection portion has a convex portion that is continuous in the circumferential direction and protrudes outward, the length of the suction portion in the longitudinal axis direction is 4 mm to 35 mm, the length of the connection portion in the longitudinal axis direction is 5 mm to 13 mm, the diameter of the tip end of the suction portion lumen is 0.5 mm to 3.5 mm, and the difference between the maximum diameter of the outer surface of the suction portion in a plane perpendicular to the longitudinal axis in a region of the suction portion where there are no side holes and the diameter of the suction portion lumen is 1.2 mm to 2.5 mm, The maximum diameter of the outer surface of the suction part is larger than the diameter of the outer surface of the connection part, and the total weight of the suction part and the connection part is 0.3 g to 4.5 g; One end of a flexible tube is fitted onto the outer surface of the connecting portion, and the other end of the flexible tube is connectable to a medical suction device; A medical suction tip characterized in that when connected to a medical suction device via the flexible tube and driven under negative pressure, the tip of the suction portion adheres to biological tissue, thereby maintaining fixation to the biological tissue.

2. 2. The medical suction tip according to claim 1, wherein the diameter of the connection portion lumen is the same as or larger than the diameter of the suction portion lumen, the diameter of the suction portion lumen at the rear end of the suction portion is larger than the diameter of the suction portion lumen at the front end, the diameter of the suction portion lumen at the front end is 0.6 mm to 3.5 mm, and the diameter of the connection portion lumen at the rear end is 0.8 mm to 4 mm.

3. 2. The medical suction tip according to claim 1, further comprising a connecting means for anchoring the medical suction tip in a surgical field or for holding the medical suction tip in another device.

4. a medical suction tip having a substantially straight suction portion having a suction portion front end, a suction portion rear end, a suction portion outer surface, and a suction portion inner lumen, and a substantially straight connecting portion having a connecting portion front end, a connecting portion rear end, a connecting portion outer surface, and a connecting portion inner lumen; a flexible tube having one end fitted to the outer surface of the connecting portion and the other end having a suction device connector connectable to a medical suction device; the rear end of the suction portion and the front end of the connection portion are continuous, the lumen of the suction portion and the lumen of the connection portion are continuous, and the lumen of the suction portion and the lumen of the connection portion have the same longitudinal axis; the distal end of the suction unit has distal grooves extending in two directions in a plane perpendicular to the longitudinal axis of the lumen of the suction unit, intersecting each other and opening to the distal end, The width of the tip groove is smaller than the diameter of the suction lumen at the tip of the suction part, and is 0.1 mm to 1 mm, and the depth is 0.3 mm to 2 mm; the suction portion has three to six side holes penetrating from the outer surface of the suction portion to the lumen of the suction portion; the total opening area of ​​the side holes on the outer surface of the suction portion is 0.21 mm 2 to 4.71 mm 2 ; the outer surface of the connection portion and the outer surface of the suction portion are connected by a step portion, and the outer surface of the connection portion has a convex portion that is continuous in the circumferential direction and protrudes outward, the length of the suction portion in the longitudinal axis direction is 4 mm to 35 mm, the length of the connection portion in the longitudinal axis direction is 5 mm to 13 mm, the diameter of the tip end of the suction portion lumen is 0.5 mm to 3.5 mm, and the difference between the maximum diameter of the outer surface of the suction portion in a plane perpendicular to the longitudinal axis in a region of the suction portion where there are no side holes and the diameter of the suction portion lumen is 1.2 mm to 2.5 mm, The maximum diameter of the outer surface of the suction part is larger than the diameter of the outer surface of the connection part, and the total weight of the suction part and the connection part is 0.3 g to 4.5 g; A medical suction tube characterized in that, when connected to a medical suction device via the flexible tube and driven under negative pressure, the tip of the suction portion adheres to biological tissue, thereby maintaining fixation to the biological tissue.

5. 5. The medical suction tube according to claim 4, wherein the diameter of the connection portion lumen is the same as or larger than the diameter of the suction portion lumen, the diameter of the suction portion lumen at the rear end of the suction portion is larger than the diameter of the suction portion distal end, the diameter of the suction portion lumen at the distal end is 0.6 mm to 3.5 mm, and the diameter of the connection portion lumen at the rear end is 0.8 mm to 4 mm.

6. 5. The medical suction tube according to claim 4, further comprising a connecting means for anchoring the vicinity of the medical suction tip of the flexible tube or the medical suction tip to a surgical field or for holding the medical suction tip to another device.

Images