Blood vessel dilator

Claim 2

A blood vessel dilator comprising: a main tube having a lumen; a distal-end tube put in a distal end portion of the main tube with a front end portion of the distal-end tube protruding out of the distal end of the main tube; a dilatation element with a front end portion of the dilatation element connected to a front end portion of the distal-end tube and a rear end portion of the dilatation element connected to the distal end portion of the main tube, and being inflatable and contractible or foldable when deflated; a resilient core member put through the lumen of the main tube and an inside of the distal-end tube; a leading guide provided at a distal end portion of the resilient core member; a main-tube hub connected to a proximal end of the main tube; a core-member hub connected to a proximal end of the resilient core member and secured to the main-tube hub turnably with respect to the main tube; an opening communicating with the lumen in the main tube and serving as a port; and the distal-end tube being connected to the distal end of the main tube without blocking the communication of the lumen in the main tube and an inside of the dilatation element, and the distal-end tube having a contact portion whose inside diameter is substantially equal to or slightly larger than the diameter of the resilient core member partially or over an entire length of the resilient core member so as to support the resilient core member turnably and liquid-tight; wherein an inside diameter of the rear end portion of said distal-end tube is smaller than an inside diameter of the front end portion of said distal-end tube to form said contact portion in the front end portion.

Claim 3

A blood vessel dilator as defined in claim 1, in which said main tube has a length two times or more greater than that of said distal-end tube.

Claim 4

A blood vessel dilator as defined in claim 1, in which said resilient core member has a proximal portion with a high resilience and a flexible distal portion.

Claim 5

A blood vessel dilator as defined in claim 1, in which said core-member hub comprises a knob-like portion serving as a means of turning said resilient core member and restricting the move of said resilient core member in the direction of an axis of the resilient core member.

Claim 6

A blood vessel dilator as defined in claim 1, in which said opening communicating with said lumen of the main tube and serving as a port is provided in said core-member hub.

Claim 7

A blood vessel dilator as defined in claim 1, in which said main-tube hub and said core-member hub are connected turnably and liquid-tight.

Claim 8

A blood vessel dilator as defined in claim 1, in which a portion of said resilient core member situated in said distal-end tube has continuously or stepwise decreasing diameters to the distal end.

Claim 9

A blood vessel dilator as defined in claim 1, in which a lubricant is applied to said contact portion of said distal-end tube.

Claim 10

A blood vessel dilator as defined in claim 1, in which said main tube includes a metal tube for the proximal portion which is longer than half the total length of said main tube and a flexible plastic tube connected to the metal tube to form said distal portion and to make it flexible.

Claim 11

A blood vessel dilator comprising: a main tube having a lumen; a distal-end tube put in a distal end portion of the main tube with a front end portion of the distal-end tube protruding out of a distal end of the main tube; a dilatation element with a front end portion of the dilatation element connected to a front end portion of the distal-end tube and a rear end portion of the dilatation element connected to the distal end portion of the main tube, and being inflatable and contractible or foldable when deflated; a resilient core member put through the lumen of the main tube and an inside of the distal-end tube; a leading guide provided at a distal end portion of the resilient core member; a main-tube hub connected to a proximal end of the main tube and having an opening communicating with the lumen inside the main tube and serving as a port; a core-member hub connected to the proximal end of the resilient core member and secured to the main-tube hub turnably; and the distal-end tube being connected to the distal end of the main tube without blocking the communication of the lumen in the main tube and an inside of the dilatation element, and the distal-end tube having a contact portion whose inside diameter is formed substantially equal to or slightly larger than the diameter of the resilient core member partially or over an entire length of the resilient core member so as to support the resilient core member turnably and liquid-tight; wherein an inside diameter of the rear end portion of said distal-end tube is smaller than an inside diameter of the front end portion of said distal-end tube to form said contact portion in the front end portion.

Claim 12

A blood vessel dilator comprising: a main tube having a lumen; a distal-end tube put in a distal end portion of the main tube with a front end portion of the distal-end tube protruding out of a distal end of the main tube; a dilatation element with a front end portion of the dilatation element connected to a front end portion of the distal-end tube and a rear end portion of the dilatation element connected to the distal end portion of the main tube, and being inflatable and contractible or foldable when deflated; a resilient core member put through the lumen of the main tube and an inside of the distal-end tube; a leading guide provided at a distal end portion of the resilient core member; a main-tube hub connected to a proximal end of the main tube and having an opening communicating with the lumen inside the main tube and serving as a port; a core-member hub connected to the proximal end of the resilient core member and secured to the main-tube hub turnably; and the distal-end tube being connected to the distal end of the main tube without blocking the communication of the lumen in the main tube and an inside of the dilatation element, and the distal-end tube having a contact portion whose inside diameter is formed substantially equal to or slightly larger than the diameter of the resilient core member partially or over an entire length of the resilient core member so as to support the resilient core member turnably and liquid-tight; wherein an inside diameter of the rear end portion of said distal-end tube is smaller than an inside diameter of the front end portion of said distal-end tube to form said contact portion in the front end portion.

Claim 13

A blood vessel dilator as defined in claim 10, in which said main tube has a length two times or more greater than that of said distal-end tube.

Claim 14

A blood vessel dilator as defined in claim 10, in which said resilient core member has a proximal portion with a high resilience and a flexible distal portion.

Claim 15

A blood vessel dilator as defined in claim 10, in which said core-member hub comprises a knob-like portion serving as a means of turning said resilient core member and restricting the move of said resilient core member in the direction of an axis of the resilient core member.

Claim 16

A blood vessel dilator as defined in claim 10, in which said main-tube hub and said core-member hub are connected turnably and liquid-tight.

Claim 17

A blood vessel dilator as defined in claim 10, in which a lubricant is applied to said contact portion of said distal-end tub.

Claim 18

A blood vessel dilator as defined in claim 10, in which said main tube includes a metal tube for the proximal portion which is longer than half the total length of said main tube and a flexible plastic tube connected to the metal tube to form said distal portion and to make it flexible.

Claim 19

A blood vessel dilator comprising a main tube having a smaller-diameter distal end portion and a larger-diameter proximal major portion; a dilatation element with a front end portion of the dilatation element connected to a front end portion of the main tube with a smaller diameter and a rear end portion of the dilatation element to the major portion of the main tube with a large diameter; a resilient core member put through an inside of the main tube and an inside of the distal-end tube; a leading guide provided at a distal end portion of the resilient core member; a lumen formed between a proximal major portion the main tube and the resilient core member; a bore provided in the distal end of the proximal major portion of the main tube for communicating the lumen and an inside of the dilatation element with each other; an opening communicating with the lumen formed between the proximal major portion of the main tube and the resilient core member; a main-tube hub connected to the proximal end of the main tube and having a bore communicating with the lumen inside the main tube; a core-member hub connected to the proximal end of the resilient core member, secured to the main-tube hub turnably: and said smaller-diameter distal end portion of the main tube has a substantially equal to or slightly larger diameter than the diameter of the resilient core member so as to support the resilient core member turnably and liquid-tight.

Claim 20

A blood vessel dilator comprising a main tube having a smaller-diameter distal end portion and a larger-diameter proximal major portion; a dilatation element with a front end portion of the dilatation element connected to a front end portion of the main tube with a smaller diameter and a rear end portion of the dilatation element to the major portion of the main tube with a large diameter; a resilient core member put through an inside of the main tube and an inside of the distal-end tube; a leading guide provided at a distal end portion of the resilient core member; a lumen formed between a proximal major portion the main tube and the resilient core member; a bore provided in the distal end of the proximal major portion of the main tube for communicating the lumen and an inside of the dilatation element with each other; an opening communicating with the lumen formed between the proximal major portion of the main tube and the resilient core member; a main-tube hub connected to the proximal end of the main tube and having a bore communicating with the lumen inside the main tube; a core-member hub connected to the proximal end of the resilient core member, secured to the main-tube hub turnably: and said smaller-diameter distal end portion of the main tube has a substantially equal to or slightly larger diameter than the diameter of the resilient core member so as to support the resilient core member turnably and liquid-tight.

Claim 21

A blood vessel dilator as defined in claim 17, in which said resilient core member has a proximal portion with a high resilience and a flexible distal portion.

Claim 22

A blood vessel dilator as defined in claim 19, in which said core-member hub comprises a knob-like portion serving as a means of turning said resilient core member and restricting the move of said resilient core member in the direction of its length.

Claim 23

A blood vessel dilator as defined in claim 17, in which said opening communicating with said lumen and serving as a port is provided in said main-tube hub.

Claim 24

A blood vessel dilator as defined in claim 17, in which said main-tube hub and said core-member hub are connected turnably and liquid-tight.

Claim 25

A blood vessel dilator as defined in claim 17, in which a lubricant is applied to said smaller-diameter distal end portion of the main tube and the resilient core member.

Claim 26

A blood vessel dilator as defined in claim 17, in which said main tube includes a metal tube for the proximal portion which is longer than half the total length of said main tube and a flexible plastic tube connected to the metal tube to form said distal portion and to make it flexible.

Claim 27

A blood vessel dilator comprising: a main tube having a lumen; a distal-end tube put in a distal end portion of the main tube with a front end portion of the distal-end tube protruding out of the distal end of the main tube; a dilatation element with a front end portion of the dilatation element connected to a front end portion of the distal-end tube and a rear end portion of the dilatation element connected to the distal end portion of the main tube, and being inflatable and contractible or foldable when deflated; a resilient core member put through the lumen of the main tube and an inside of the distal-end tube, and arranged so as to be freely turnable with respect to the main tube and the distal-end tube; a leading guide provided at a distal end portion of the resilient core member; a main-tube hub connected to a proximal end of the main tube; a core-member hub connected to a proximal end of the resilient core member and secured to the main-tube hub turnably with respect to the main tube; an opening communicating with the lumen in the main tube and serving as a port; an inside of the dilatation element being in communication with the lumen in the main tube; and the distal-end tube having a contact portion which contacts a distal portion of the resilient core-member; wherein an inside diameter of the contact portion of the distal-end tube is substantially equal to or slightly larger than the diameter of the resilient core member over at least a part of the length of the resilient core member.

Claim 28

A blood vessel dilator comprising: a main tube having a lumen; a distal-end tube put in a distal end portion of the main tube with a front end portion of the distal-end tube protruding out of the distal end of the main tube; a dilatation element with a front end portion of the dilatation element connected to a front end portion of the distal-end tube and a rear end portion of the dilatation element connected to the distal end portion of the main tube, and being inflatable and contractible or foldable when deflated; a resilient core member put through the lumen of the main tube and an inside of the distal-end tube, and arranged so as to be freely turnable with respect to the main tube and the distal-end tube; a leading guide provided at a distal end portion of the resilient core member; a main-tube hub connected to a proximal end of the main tube; a core-member hub connected to a proximal end of the resilient core member and secured to the main-tube hub turnably with respect to the main tube; an opening communicating with the lumen in the main tube and serving as a port; an inside of the dilatation element being in communication with the lumen in the main tube; and the distal-end tube having a contact portion which contacts a distal portion of the resilient core-member; wherein an inside diameter of the contact portion of the distal-end tube is substantially equal to or slightly larger than the diameter of the resilient core member over at least a part of the length of the resilient core member.

Claim 29

A blood vessel dilator as defined in claim 24, in which said main tube has a length at least two times greater than that of said distal-end tube.

Claim 30

A blood vessel dilator as defined in claim 24, in which said resilient core member has a proximal portion with a high resilience and a flexible distal portion.

Claim 31

A blood vessel dilator as defined in claim 24, in which an inside diameter of the rear end portion of said distal-end tube is smaller than an inside diameter of the front end portion of said distal-end tube to form said contact portion in the front end portion.

Claim 32

A blood vessel dilator as defined in claim 24, in which said main tube includes a metal tube for the proximal portion which is longer than half the total length of said main tube and a flexible plastic tube connected to the metal tube to form said distal portion and to make it flexible.

Claim 33

A blood vessel dilator as defined in claim 24, in which said core-member hub comprises a knob-like portion serving as a means of turning said resilient core member and restricting movement of said resilient core member in the axial direction thereof.

Claim 34

A blood vessel dilator as defined in claim 24, in which said opening communicating with said lumen of the main tube and serving as a port is provided in said core-member hub.

Claim 35

A blood vessel dilator as defined in claim 24, in which said main tube hub and said core-member hub are connected turnably and liquid-tight.

Claim 36

A blood vessel dilator as defined in claim 24, in which a portion of said resilient core member situated in said distal-end tube has continuously or stepwise decreasing diameters to the distal end.

Claim 37

A blood vessel dilator as defined in claim 24, in which a lubricant is applied to said contact portion of said distal-end tube.

Claim 38

A blood vessel dilator comprising: a main tube having a lumen; a distal-end tube put in a distal end portion of the main tube with a front end portion of the distal-end tube protruding out of the distal end of the main tube; a dilatation element with a front end portion of the dilatation element connected to a front end portion of the distal-end tube and a rear end portion of the dilatation element connected to the distal end portion of the main tube, and being inflatable and contractible or foldable when deflated; a resilient core member put through the lumen of the main tube and an inside of the distal-end tube; a leading guide provided at a distal end portion of the resilient core member; a main-tube hub connected to a proximal end of the main tube; a core-member hub connected to a proximal end of the resilient core member and secured to the main-tube hub turnably with respect to the main tube; an opening communicating with the lumen in the main tube and serving as a port; and the distal-end tube being connected to the distal end of the main tube without blocking the communication of the lumen in the main tube and an inside of the dilatation element, and the distal-end tube having a contact portion whose inside diameter is substantially equal to or slightly larger than the diameter of the resilient core member partially or over an entire length of the resilient core member so as to support the resilient core member turnably and liquid-tight; wherein said main tube includes a metal tube for the proximal portion which is longer than half the total length of said main tube, and a flexible plastic tube connected to the metal tube to form said distal end portion and to make it flexible.

Claim 39

A blood vessel dilator comprising: a main tube having a lumen; a distal-end tube put in a distal end portion of the main tube with a front end portion of the distal-end tube protruding out of the distal end of the main tube; a dilatation element with a front end portion of the dilatation element connected to a front end portion of the distal-end tube and a rear end portion of the dilatation element connected to the distal end portion of the main tube, and being inflatable and contractible or foldable when deflated; a resilient core member put through the lumen of the main tube and an inside of the distal-end tube; a leading guide provided at a distal end portion of the resilient core member; a main-tube hub connected to a proximal end of the main tube; a core-member hub connected to a proximal end of the resilient core member and secured to the main-tube hub turnably with respect to the main tube; an opening communicating with the lumen in the main tube and serving as a port; and the distal-end tube being connected to the distal end of the main tube without blocking the communication of the lumen in the main tube and an inside of the dilatation element, and the distal-end tube having a contact portion whose inside diameter is substantially equal to or slightly larger than the diameter of the resilient core member partially or over an entire length of the resilient core member so as to support the resilient core member turnably and liquid-tight; wherein said main tube includes a metal tube for the proximal portion which is longer than half the total length of said main tube, and a flexible plastic tube connected to the metal tube to form said distal end portion and to make it flexible.

Claim 40

A blood vessel dilator comprising: a main tube having a lumen; a distal-end tube put in a distal end portion of the main tube with a front end portion of the distal-end tube protruding out of a distal end of the main tube; a dilatation element with a front end portion of the dilatation element connected to a front end portion of the distal-end tube and a rear end portion of the dilatation element connected to the distal end portion of the main tube, and being inflatable and contractible or foldable when deflated; a resilient core member put through the lumen of the main tube and an inside of the distal-end tube; a leading guide provided at a distal end portion of the resilient core member; a main-tube hub connected to a proximal end of the main tube and having an opening communicating with the lumen inside the main tube and serving as a port; a core-member hub connected to the proximal end of the resilient core member and secured to the main-tube hub turnably; and the distal-end tube being connected to the distal end of the main tube without blocking the communication of the lumen in the main tube and an inside of the dilatation element, and the distal-end tube having a contact portion whose inside diameter is formed substantially equal to or slightly larger than the diameter of the resilient core member partially or over an entire length of the resilient core member so as to support the resilient core member turnably and liquid-tight; wherein said main tube includes a metal tube for the proximal portion which is longer than half the total length of said main tube, and a flexible plastic tube connected to the metal tube to form said distal end portion and to make it flexible.

Claim 41

A blood vessel dilator comprising: a main tube having a lumen; a distal-end tube put in a distal end portion of the main tube with a front end portion of the distal-end tube protruding out of a distal end of the main tube; a dilatation element with a front end portion of the dilatation element connected to a front end portion of the distal-end tube and a rear end portion of the dilatation element connected to the distal end portion of the main tube, and being inflatable and contractible or foldable when deflated; a resilient core member put through the lumen of the main tube and an inside of the distal-end tube; a leading guide provided at a distal end portion of the resilient core member; a main-tube hub connected to a proximal end of the main tube and having an opening communicating with the lumen inside the main tube and serving as a port; a core-member hub connected to the proximal end of the resilient core member and secured to the main-tube hub turnably; and the distal-end tube being connected to the distal end of the main tube without blocking the communication of the lumen in the main tube and an inside of the dilatation element, and the distal-end tube having a contact portion whose inside diameter is formed substantially equal to or slightly larger than the diameter of the resilient core member partially or over an entire length of the resilient core member so as to support the resilient core member turnably and liquid-tight; wherein said main tube includes a metal tube for the proximal portion which is longer than half the total length of said main tube, and a flexible plastic tube connected to the metal tube to form said distal end portion and to make it flexible.

Claim 42

A blood vessel dilator comprising: a main tube having a lumen; a distal-end tube put in a distal end portion of the main tube with a front end portion of the distal-end tube protruding out of the distal end of the main tube; a dilatation element with a front end portion of the dilatation element connected to a front end portion of the distal-end tube and a rear end portion of the dilatation element connected to the distal end portion of the main tube, and being inflatable and contractible or foldable when deflated; a resilient core member put through the lumen of the main tube and an inside of the distal-end tube, and arranged so as to be freely turnable with respect to the main tube and the distal-end tube; a leading guide provided at a distal end portion of the resilient core member; a main-tube hub connected to a proximal end of the main tube; a core-member hub connected to a proximal end of the resilient core member and secured to the main-tube hub turnably with respect to the main tube; an opening communicating with the lumen in the main tube and serving as a port; an inside of the dilatation element being in communication with the lumen in the main tube; and the distal-end tube having a contact portion which contacts a distal portion of the resilient core-member; wherein an inside diameter of the rear end portion of said distal-end tube is smaller than an inside diameter of the front end portion of said distal-end tube to form said contact portion in the front end portion.

Claim 43

A blood vessel dilator comprising: a main tube having a lumen; a distal-end tube put in a distal end portion of the main tube with a front end portion of the distal-end tube protruding out of the distal end of the main tube; a dilatation element with a front end portion of the dilatation element connected to a front end portion of the distal-end tube and a rear end portion of the dilatation element connected to the distal end portion of the main tube, and being inflatable and contractible or foldable when deflated; a resilient core member put through the lumen of the main tube and an inside of the distal-end tube, and arranged so as to be freely turnable with respect to the main tube and the distal-end tube; a leading guide provided at a distal end portion of the resilient core member; a main-tube hub connected to a proximal end of the main tube; a core-member hub connected to a proximal end of the resilient core member and secured to the main-tube hub turnably with respect to the main tube; an opening communicating with the lumen in the main tube and serving as a port; an inside of the dilatation element being in communication with the lumen in the main tube; and the distal-end tube having a contact portion which contacts a distal portion of the resilient core-member; wherein an inside diameter of the rear end portion of said distal-end tube is smaller than an inside diameter of the front end portion of said distal-end tube to form said contact portion in the front end portion.