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EP-4302707-B1 - RETRACTOR

EP4302707B1EP 4302707 B1EP4302707 B1EP 4302707B1EP-4302707-B1

Inventors

  • OZAKI, SHIGEYUKI

Dates

Publication Date
20260506
Application Date
20220315

Claims (5)

  1. A retractor (R5, R6) that is a plate-shaped member having a longitudinal direction and a lateral direction, the retractor comprising: a plurality of holes (502, 503, 504) penetrating from a front surface to a back surface, wherein the retractor is configured to be inserted into an aorta, wherein the retractor is further configured such that, when one end side of a thread that penetrates from the front surface to the back surface through one of the plurality of holes and penetrates from an inside to an outside of the aorta, and the other end side of the thread that penetrates from the front surface to the back surface through a hole of the plurality of holes different from the hole through which the one end side penetrates and penetrates from the inside to the outside of the aorta are pulled, the aorta is widened in a radial direction; wherein the retractor is configured to be used for aortic valvuloplasty, and to be inserted into a region in the aorta including a valsalva sinus; wherein the plurality of holes includes a plurality of first holes (503, 503) that penetrates from the front surface to the back surface and through which the thread passes; characterised in that the plurality of holes further includes a second hole (504) whose diameter is larger than a diameter of each of the plurality of first holes and which is for injecting a myocardial protective liquid; wherein the plate-shape member further has a center portion in the lateral direction being a curved surface so as to be recessed; and wherein the plate-shaped member has a portion being warped in a direction opposite to a recessed direction toward one end in a longitudinal direction.
  2. The retractor according to claim 1, further comprising: a passage formed inside to suck blood; a hole configured for taking the blood into the passage; and a connecting portion for connecting a tube configured to be connected to the passage, protruding from a side surface of the plate-shaped member, and sucking the blood in the passage.
  3. The retractor (R5) according to any one of claims 1 to 2, further comprising: a third hole (501) being configured for the thread (TH) to pass through for pulling the retractor (R5) from an outside a chest wall.
  4. The retractor (R5, R6) according to any one of claims 1 to 3, wherein one end portion (509) in a longitudinal direction has a hook shape.
  5. The retractor (R6) according to any one of claims 1 to 4, further comprising: a grip portion (602B).

Description

Technical Field The present invention relates to a holder and a retractor. Background Art As an instrument that supports a blood vessel, for example, there is a blood vessel support tool disclosed in Patent Document 1. In the blood vessel support tool, needle portions formed at tips of a pair of arm portions are used to pierce a blood vessel, and the arm portions are opened and closed, thereby widening an incision between the needle portions. US 2002/092533 Al discloses a heart retractor with a finger-like manipulator on the distal end for rotating the heart within the closed chest of the patient to expose each of the coronary arteries to be anastomosed. The retractor has an elongated shaft of approximately 15-30 cm with a handle on the proximal end of the shaft. The distal end of the retractor shaft is curved to create a finger-like manipulator. Citation List Patent Document Patent Document 1: Japanese Patent Application Laid-Open No. 2002-125976 Summary of the Invention Problems to be solved by the Invention When performing aortic valvuloplasty, it is necessary to widen the aorta in a radial direction. The blood vessel support tool disclosed in Patent Document 1 is capable of expanding a portion of the blood vessel in which an incision has been made in a direction in which the blood vessel extends, but is not suitable for maintaining a state in which a cross section of the aorta is widened in the radial direction. An object of the present invention is to maintain a state in which the aorta is widened in the radial direction. Means for solving the Problems According to the present invention, there is provided a retractor that is a plate-shaped member having a longitudinal direction and a lateral direction, a center portion in the lateral direction being a curved surface so as to be recessed, the retractor comprising: a plurality of holes penetrating from a front surface to a back surface, wherein the retractor is configured to be inserted into an aorta, wherein the retractor is further configured such that, when one end side of a thread that penetrates from the front surface to the back surface through one of the plurality of holes and penetrates from an inside to an outside of the aorta, and the other end side of the thread that penetrates from the front surface to the back surface through a hole of the plurality of holes different from the hole through which the one end side penetrates and penetrates from the inside to the outside of the aorta are pulled, the aorta is widened in a radial direction; wherein the retractor is configured to be used for aortic valvuloplasty, and to be inserted into a region in the aorta including a valsalva sinus; and wherein the plurality of holes includes a plurality of first holes that penetrates from the front surface to the back surface, the thread passes and a second hole whose diameter is larger than a diameter of each of the plurality of first holes and which is for injecting a myocardial protective liquid; and wherein the plate-shaped member has a portion being warped in a direction opposite to a recessed direction toward one end in a longitudinal direction. In a preferred aspect, the retractor further includes a passage formed inside to suck blood, a hole for taking the blood into the passage, and a connecting portion for connecting a tube configured to be connected to the passage, protruding from a side surface of the plate-shaped member, and sucking the blood into the passage. In a preferred aspect, the retractor further includes a third hole through which the thread passes for pulling the retractor from outside a chest wall. In a preferred aspect, one end portion in a longitudinal direction has a hook shape. In a preferred aspect, the retractor further includes a hole through which the thread passes for pulling the retractor from outside the chest wall. A tip portion of the retractor may have a hook shape. The retractor may further include a grip portion. Advantageous Effect of the Invention According to the present invention, it is possible to maintain a state in which the aorta is widened in the radial direction. Brief Description of the Drawings FIG. 1 is a perspective view of a holder 1.FIG. 2 is a top view of the holder 1.FIG. 3 is a side view of the holder 1.FIG. 4 is a top view of a first component P1.FIG. 5 is a front view of the first component P1.FIG. 6 is a side view of the first component P1.FIG. 7 is a sectional view taken along line A-A of FIG. 4.FIG. 8 is a top view of a second component P2.FIG. 9 is a front view of the second component P2.FIG. 10 is a side view of the second component P2.FIG. 11 is a sectional view taken along line B-B of FIG. 8.FIG. 12 is a perspective view of a retractor R1.FIG. 13 is a front view of the retractor R1.FIG. 14 is a top view of the retractor R1.FIG. 15 is a side view of the retractor R1.FIG. 16 is a schematic view of a cut ascending aorta BV as viewed from above.FIG. 17 is a schematic view of the cut ascending aort