Rotational catheter with extended catheter body drive shaft support
First Claim
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1. Medical sensing catheter apparatus comprising:
- an elongated flexible sheath comprising a distal end and a proximal end;
an elongated flexible drive structure longitudinally extending through an interior of said sheath and being movable relative thereto, said drive structure comprising a distal end portion with a sensor disposed thereon, wherein the sensor is operative to generate signals useable to create diagnostic information with respect to a patient body area;
an elongated flexible tubular inner catheter member arranged externally to said sheath, said inner catheter member being distally and proximally movable along said sheath between fully extended and fully retracted positions thereon;
an elongated flexible tubular outer catheter member arranged externally onto said elongated flexible tubular inner catheter member, said outer catheter member comprising a proximal end secured to a stationary support structure, and a distal end secured to an annular coupling, wherein the annular coupling is secured to said sheath at a location intermediate said distal and proximal ends of said sheath, wherein the elongated flexible tubular inner catheter member is distally telescoped externally onto a proximal end portion of said sheath extending proximally through said outer catheter member; and
wherein an inner catheter member diameter is less than an outer catheter member diameter and the inner catheter member slidably extends through an O-ring member, said O-ring member located in an interior of the stationary support structure,wherein an outer diameter and a length of the annular coupling is smaller than an outer diameter and a length of the stationary support structure, andwherein the distal end of the elongated flexible sheath is positioned distally of the annular coupling and is configured to be inserted into the patient body area.
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Abstract
In a rotational intravascular catheter, a proximal section of the catheter sheath, within which an elongated flexible drive member portion of the catheter is movably disposed, is extended into a telescoping portion of the catheter. The proximal sheath section functions to support the section of the drive member positioned within the telescoping section whether the telescoping section is in an extended position, qa retracted position, or any position therebetween.
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Citations
16 Claims
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1. Medical sensing catheter apparatus comprising:
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an elongated flexible sheath comprising a distal end and a proximal end; an elongated flexible drive structure longitudinally extending through an interior of said sheath and being movable relative thereto, said drive structure comprising a distal end portion with a sensor disposed thereon, wherein the sensor is operative to generate signals useable to create diagnostic information with respect to a patient body area; an elongated flexible tubular inner catheter member arranged externally to said sheath, said inner catheter member being distally and proximally movable along said sheath between fully extended and fully retracted positions thereon; an elongated flexible tubular outer catheter member arranged externally onto said elongated flexible tubular inner catheter member, said outer catheter member comprising a proximal end secured to a stationary support structure, and a distal end secured to an annular coupling, wherein the annular coupling is secured to said sheath at a location intermediate said distal and proximal ends of said sheath, wherein the elongated flexible tubular inner catheter member is distally telescoped externally onto a proximal end portion of said sheath extending proximally through said outer catheter member; and wherein an inner catheter member diameter is less than an outer catheter member diameter and the inner catheter member slidably extends through an O-ring member, said O-ring member located in an interior of the stationary support structure, wherein an outer diameter and a length of the annular coupling is smaller than an outer diameter and a length of the stationary support structure, and wherein the distal end of the elongated flexible sheath is positioned distally of the annular coupling and is configured to be inserted into the patient body area. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Catheter apparatus comprising:
an elongated flexible tubing assembly comprising; a telescope section including a tubular outer telescope member comprising proximal and distal ends, wherein the proximal end is secured to a stationary support structure and the distal end is secured to an annular coupling, the stationary support structure comprising an O-ring member on an interior of the stationary support structure; a tubular inner telescope member longitudinally movable through an interior of said outer telescope member toward and away from said distal end thereof, wherein the tubular inner telescope member slidably passes through the O-ring member; a sheath member anchored to said outer telescope member and comprising a distal end portion and a proximal end portion, the proximal end portion extending proximally through said outer telescope member and telescopingly received within an interior of said inner telescope member, wherein an inner telescope member diameter is less than an outer telescope member diameter; and an elongated flexible drive member movable relative to said flexible tubing assembly and extending through said catheter, said outer telescope member and said inner telescope member and being supported within said outer telescope member by said proximal end portion of said sheath member, wherein an outer diameter and a length of the annular coupling is smaller than an outer diameter and a length of the stationary support structure, and wherein the distal end portion of the sheath member is positioned distally of the annular coupling and is sized and shaped for positioning within a vessel of a patient. - View Dependent Claims (9, 10, 11, 12, 13)
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14. Medical catheter apparatus comprising:
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a tubular outer catheter member comprising proximal and distal ends, wherein the proximal end is secured to a stationary support structure and the distal end is secured to an annular coupling, wherein the stationary support structure includes an O-ring member in an interior of the stationary support structure; a tubular inner catheter member comprising proximal and distal ends, said inner catheter member being telescoped into said outer catheter member, through said proximal end thereof, for axial movement through said outer catheter member between retracted and extended positions relative to said outer catheter member, wherein said inner catheter member slidably passes through said O-ring member; a sheath longitudinally extending distally away from said distal end of said outer tubular catheter member and comprising a proximal portion extending through said outer catheter member, wherein the sheath is positioned within an interior of the tubular inner catheter member; and an elongated flexible drive member extending through and being movable relative to said outer catheter member and said sheath, said proximal portion of said sheath supporting said flexible drive member within said outer catheter member, and being telescoped into said distal end of said inner catheter member, wherein an inner catheter member diameter is less than an outer catheter member diameter, wherein an outer diameter and a length of the annular coupling is smaller than an outer diameter and a length of the stationary support structure, and wherein a distal end of the sheath is positioned distally of the annular coupling and is configured to inserted into a patient body area. - View Dependent Claims (15, 16)
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Specification