Method and apparatus for accessing the pericardial space
First Claim
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1. An apparatus for percutaneously accessing the intrapericardial space, comprising:
- an outer elongated tubular body having a closed distal end, an aperture in a sidewall adjacent the closed end, and a proximal portion for applying a vacuum thereto, an inner elongated tubular body having a distal end sealingly extending into said outer tubular body from a proximal end external to said outer body, creating a first passage between said outer and inner tubular bodies, a piercing body disposed in a distal portion of said outer tubular body adjacent said aperture, said piercing body having a sharp distal end and a lumen extending therethrough from a proximal end thereof to a sidewall opening therein adjacent such sharp distal end, the proximal end of said piercing body being connected to the distal end of said inner tubular body, thereby creating a conduit leading from externally of said outer tubular body to said piercing body sidewall opening, said piercing body being longitudinally moveable in said outer tubular body to an extent permitting the distal end thereof to traverse said aperture and appose said piercing body sidewall opening and said aperture, and passage means laterally adjacent said piercing body permitting flow communication from said aperture to said first passage regardless of the longitudinal location of said piercing body in said distal portion of said outer tubular body.
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Abstract
Apparatus for accessing the pericardial space including an elongate tubular member terminating in an opening that permits the induction of pericardial tissue. A piercing member operating within the tubular member can pierce the pericardial tissue providing guidewire access to the pericardial space of a patient'"'"'s heart.
164 Citations
22 Claims
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1. An apparatus for percutaneously accessing the intrapericardial space, comprising:
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an outer elongated tubular body having a closed distal end, an aperture in a sidewall adjacent the closed end, and a proximal portion for applying a vacuum thereto, an inner elongated tubular body having a distal end sealingly extending into said outer tubular body from a proximal end external to said outer body, creating a first passage between said outer and inner tubular bodies, a piercing body disposed in a distal portion of said outer tubular body adjacent said aperture, said piercing body having a sharp distal end and a lumen extending therethrough from a proximal end thereof to a sidewall opening therein adjacent such sharp distal end, the proximal end of said piercing body being connected to the distal end of said inner tubular body, thereby creating a conduit leading from externally of said outer tubular body to said piercing body sidewall opening, said piercing body being longitudinally moveable in said outer tubular body to an extent permitting the distal end thereof to traverse said aperture and appose said piercing body sidewall opening and said aperture, and passage means laterally adjacent said piercing body permitting flow communication from said aperture to said first passage regardless of the longitudinal location of said piercing body in said distal portion of said outer tubular body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. The apparatus for percutaneously accessing the intrapericardial space, comprising:
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an elongate outer tubular body having a closed distal end and a passage extending through said body from an aperture in the sidewall of the body adjacent said distal end thereof and including a proximal portion for applying a vacuum, a needle having a sharp leading end, a trailing end and a lumen therethrough from said trailing end to a side opening in the needle adjacent said leading end, said needle being arranged in said tubular body to allow flow communication in said passage from said aperture toward said proximal opening under influence of an applied vacuum and being longitudinally moveable in said passage for said sharp end to traverse said aperture and appose said needle side opening and said aperture without occluding flow communication in said passage, and a filament received in said needle lumen and exiting said tubular body at a proximal portion thereof. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. An apparatus for percutaneously accessing the intrapericardial space, comprising:
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an elongated outer tubular body having a closed distal end, an aperture in a sidewall adjacent the closed end, a proximal inlet and a proximal branch for applying a vacuum thereto, a seal in said proximal inlet for sealing said outer tubular body to maintain an applied vacuum in said outer tubular body, a needle carrier arranged and moveable longitudinally in a distal portion of said outer tubular body without occluding flow communication from said aperture toward said branch under influence of an applied vacuum, limiter means in said outer tubular body distally of said branch and proximately of said closure for limiting distal and proximal longitudinal travel of said needle carrier, a needle having a lumen and carried in said needle carrier, said needle having a sharp leading end extending distally from said carrier and a trailing end extending proximately from said carrier, and having a lateral opening adjacent said sharp leading end alignable with said aperture of said outer tubular body, a inner tubular body receive din said outer tubular body without occluding fluid flow therein under influence of an applied vacuum and connected distally to said trailing end of said needle to provide a conduit including said lumen, said inner tubular body sealingly exiting said outer tubular body proximately through said seal, and a filament received in said conduit. - View Dependent Claims (20, 21, 22)
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Specification