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US 10,238,835 B2Granted
Introducer sheath
AssigneeTerumo Kabushiki Kaisha
InventorRyo Okamura
Life of this patent
Estimating the term…
Abstract
An introducer sheath is disclosed having a high centering performance that is relatively easily capable of introducing an elongated body such as a catheter into an appropriate position, and is capable of appropriately maintaining hemostasis and insertibility of a valve body. The introducer sheath includes a tubular member provided with a hollow section through which an elongated body is freely insertable, a hub that includes an inner space which communicates with the hollow section of the tubular member and is provided on a proximal side of the tubular member, a valve body that is placed in the inner space of the hub, and an annular member that contacts with the valve body to fix the valve body to the inner space and includes a through-hole into which the elongated body can be inserted.
Claims18
An introducer sheath into which an elongated medical device is insertable, the introducer sheath comprising:
- a sheath tube through which extends a lumen that receives the elongated medical device, the sheath tube possessing a proximal end;
- a hub fixed to the sheath tube and positioned at the proximal end of the sheath tube, the hub possessing a through-hole extending throughout the hub and communicating with the lumen in the sheath tube, the hub possessing a recessed proximal end;
- a valve body positioned in the recessed proximal end of the hub and covering the through-hole in the hub in a liquid-tight manner, the valve body possessing a proximal-facing surface facing away from the sheath tube and a distal-facing surface facing toward the sheath tube, the valve body including a slit that communicates with the distal-facing surface of the valve body;
- an annular member separate from the valve body, the annular member being mounted on the proximal end of the hub and in contact with the proximal-facing surface of the valve body, the annular member possessing a through-hole passing completely through the annular member, the slit in the valve body being exposed at the through-hole in the annular member to permit the elongated medical device to be inserted through the through-hole in the annular member and into the slit in the valve body;
- the annular member including a protrusion section that protrudes toward the valve body so that a center of the valve body is pressed in a manner causing the valve body to be concave toward a distal side, the protrusion section contacting the valve body at a position further toward a central side of the valve body than end sections of a proximal side slit of the valve body, and the protrusion section having a curved proximal-facing surface;
- the annular member possessing a distal-facing surface facing towards the hub, the through-hole in the annular member narrowing in size in a direction toward the distal-facing surface of the annular member, and wherein a thickness of the protrusion section between the distal-facing surface and the curved proximal-facing surface decreases toward a central axis of the through-hole;
- and
- wherein the distal-facing surface includes a concave section that is recessed toward a proximal direction, the concave section being positioned radially between the protrusion section and an annular flat surface of the distal-facing surface of the annular member that is in direct contact with the proximal-facing surface of the valve body.
5 more elements
An introducer sheath comprising:
- a tubular member that includes a hollow section through which an elongated body is freely insertable;
- a hub that includes an inner space which communicates with the hollow section of the tubular member and is provided on a proximal side of the tubular member;
- a valve body positioned in the inner space of the hub, the valve body possessing a proximal-facing surface facing away from the tubular member and a distal-facing surface facing toward the tubular member, the valve body including a slit that communicates with the distal-facing surface of the valve body;
- an annular member that contacts the valve body to fix the valve body in the inner space, the annular member including a through-hole into which the elongated body is insertable, the annular member possessing a through-hole passing completely through the annular member, the slit in the valve body being exposed at the through-hole in the annular member to permit the elongated medical device to be inserted through the through-hole in the annular member and into the slit in the valve body;
- the annular member including a protrusion section that protrudes toward the valve body so that a center of the valve body is pressed in a manner causing the valve body to be concave toward the distal side, the protrusion section contacting the valve body at a position further toward a central side of the valve body than end sections of a proximal side slit of the valve body, and the protrusion section having a curved proximal-facing surface;
- the annular member possessing a distal-facing surface facing towards the hub, the through-hole in the annular member narrowing in size in a direction toward the distal-facing surface of the annular member, and wherein a thickness of the protrusion section between the distal-facing surface and the curved proximal-facing surface decreases toward a central axis of the through-hole;
- and
- wherein the distal-facing surface includes a concave section that is recessed toward a proximal direction, the concave section being positioned radially between the protrusion section and an annular flat surface of the distal-facing surface of the annular member that is in direct contact with the proximal-facing surface of the valve body.
5 more elements
An introducer sheath into which an elongated medical device is insertable, the introducer sheath comprising:
- a sheath tube through which extends a lumen that is configured to receive the elongated medical device, the sheath tube possessing a proximal end;
- a hub fixed to the sheath tube and positioned at the proximal end of the sheath tube, the hub possessing a through-hole extending throughout the hub and communicating with the lumen in the sheath tube, the hub possessing a recessed proximal end;
- a valve body positioned in the recessed proximal end of the hub and covering the through-hole in the hub in a liquid-tight manner, the valve body possessing a proximal-facing surface facing away from the sheath tube and a distal-facing surface facing toward the sheath tube, the valve body including a slit that communicates with the distal-facing surface of the valve body;
- an annular member separate from the valve body, the annular member being mounted on the proximal end of the hub and in contact with the proximal-facing surface of the valve body, the annular member possessing a through-hole passing completely through the annular member, the slit in the valve body being exposed at the through-hole in the annular member to permit the elongated medical device to be inserted through the through-hole in the annular member and into the slit in the valve body;
- the annular member including a protrusion section that protrudes toward the valve body so that a center of the valve body is pressed in a manner causing the valve body to be concave toward a distal side, the protrusion section contacting the valve body at a position further toward a central side of the valve body than end sections of a proximal side slit of the valve body, and the protrusion section having a curved proximal-facing surface;
- and
- wherein the annular member possesses a distal-facing surface facing towards the hub, the distal-facing surface including a concave section that is recessed toward a proximal direction, the concave section being positioned radially between the protrusion section and an annular surface of the distal-facing surface of the annular member that is in direct contact with the proximal-facing surface of the valve body.
4 more elements
Dependencies are inferred from the claim text.