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US 10,646,211 B2Granted
Treatment method and medical device
AssigneeTerumo Kabushiki Kaisha
InventorsTakuya Kakimoto, Shinya Sawada, Koji Yabe, Masumi Takano
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Abstract
There is provided a treatment method that is capable of reducing burden on a patient when a medical sheet is indwelled in the body of the patient. A treatment method includes an introduction of introducing a catheter, which has stored a medical sheet (e.g., a myocardial cell sheet), to a heart inside a living body, and an indwelling step of drawing the myocardial cell sheet from the catheter and indwelling the myocardial cell sheet in the heart.
Claims9
A treatment method comprising:
- storing a medical sheet inside a lumen of a catheter, wherein during storing of the medical sheet, a negative pressure is maintained inside the lumen of the catheter by applying a vacuum thereto aspirating a central portion of the medical sheet and maintaining the medical sheet in a folded state inside the lumen of the catheter;
- introducing the catheter, which stores the medical sheet therein, to a target site inside a body, wherein the medical sheet is held by a plurality of support portions disposed inside the lumen of the catheter, wherein the plurality of support portions comprise claw portions disposed at an end thereof, wherein the claw portions are bent in a direction radially inward toward an axis of the lumen, and wherein the claw portions extend past and grip an outer peripheral edge of the medical sheet;
- extending the plurality of support portions from the lumen of the catheter, wherein the plurality of support portions extend radially outward from the lumen expanding the medical sheet while being gripped at the outer peripheral edge by the claw portions and disposing the medical sheet in a position outside of the lumen of the catheter;
- indwelling the medical sheet in the target site;
- and
- extracting the catheter from the body, the medical sheet caused to remain indwelled in the target site inside the body after the catheter has been extracted from the body.
3 more elements
A medical device comprising:
- a catheter including a lumen that accommodates a medical sheet;
- an aspiration member that maintains a negative pressure in the inside the lumen and aspirates a central portion of the medical sheet gripped by the gripping member and maintains the medical sheet in a folded state inside the lumen of the catheter;
- a gripping member comprising a plurality of support portions disposed inside the lumen of the catheter in an inserted state, wherein the plurality of support portions comprise claw portions disposed at an end thereof, wherein the claw portions are bent in a direction radially inward toward an axis of the lumen, wherein the medical sheet is stored in the lumen by the claw portions extending past and gripping an outer peripheral edge of the medical sheet, wherein the plurality of support portions extend radially outward from the lumen of the catheter in a protruded state expanding the medical sheet while being gripped at the outer peripheral edge by the claw portions and disposing the medical sheet in a position outside of the lumen of the catheter, causing the medical sheet to remain indwelled in the target site inside the body after the catheter has been extracted from the body.
Dependencies are inferred from the claim text.