Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M25/00—Catheters; Hollow probes
  • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
  • A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
  • A61M25/0113—Mechanical advancing means, e.g. catheter dispensers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M25/00—Catheters; Hollow probes
  • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
  • A61M39/02—Access sites
  • A61M39/06—Haemostasis valves, i.e. gaskets sealing around a needle, catheter or the like, closing on removal thereof
  • A61M39/0613—Haemostasis valves, i.e. gaskets sealing around a needle, catheter or the like, closing on removal thereof with means for adjusting the seal opening or pressure

Definitions

• Transcatheter cardiovascular therapeutics have proved to be an effective method in treatment of vessel disease.
• Methods for catheter-based diagnostic tomographic imaging of the vessel wall and others for treatment of vessel diseases require precise movement of the catheter in order to provide a longitudinally smooth scan and/or coverage of the diseased vessel segments.
• Current devices available for longitudinal catheter movement have many limitations including big dimensions, unsterilizable thus requiring complicated sterilization wrapping, and higher costs.
• a closed blood circulation of the patient is rarely provided during the time of longitudinal catheter movement .
• a disposable system and a method for use for hemostatic valve system with built-in automatic catheter introducing and retrieval subassembly is disclosed.
• the system employs multiple hemostatic valves.
• the system comprises two separable/connectable components (a proximal and a distal component) connected by male/femal uer-type fittings.
• the distal component has a straight lumen for receiving catheter and a guidewire therethrough.
• This lumen extends distally into the main lumen of the guiding catheter and/or vessel sheath, and proximally through a primary hemostatic valve with a Luer-type male connector into the proximal component.
• the primary valve is a hemostatic valve with obturator having a steering mechanism, to inhibit out flow of blood and to provide adequate fixation of the catheter/guidewire system when desired, it has also a sideport for fluide injection through the system into the body circulation.
• the proximal part comprises a short distal common lumen at the Luer- fitting end, which diverges proximally into two channels, a guidewire channel and a main catheter channel.
• both channels may be sealed by hemostatic valves with stearing mechanism (secondary valves) , thereby fixing both guidwire & catheter and preventing outflow of blood and other fluids from the system and providing a closed circulatory system for simultaneous pressure monitoring.
• the main catheter channel is embodied into an expandable tubular telescope assembly.
• the proximal component of the system has also a motor chamber at the base post of the telescope assembly and, in its cavity, separated from the main catheter lumen by diaphragm and annular rings.
• a coaxial cable or tube is connected, at its one end, to the inner element of the telescope, and is wound on a storage drum located at the base post in the motor chamber, at the other end.
• a battery-operated, motor- associated worm/gear system is provided in the motor chamber to drive the drum at least in one direction.
• the motor drives the drum in such direction thereby stretching the coaxial cable/tube from the storage drum through the annular ring resulting into expanding the telescope, which, in turn, (for a given distance) retrieves the catheter.
• the motor/worm/gear- system is engineered to provide at least one regular speed resulting into constant expansion of the telescopic elements and smooth preferably slow catheter retrieval from a distal into a proximal position within the patients body.
• the telescope system is provided with sealing annular ring to seal the system while telescope expansion or collapse. During the telescope expansion and catheter retrieval, the guidewire remains fixed in the guidewire channel by one secondary valve unaffected by the longitudinal movement of the catheter.
• the storage drum contains a tension coil type spring.
• the motor drives the coil against its tension, thereby stretching the coil and expanding the telescope.
• unlocking mechanism (not shown) may be used to de-couple the motor/worm/gear- system from the drum/tension coil system, resulting into resilently return of the coil spring into wound condition thereby collapsing the telescope (telescope collapsing mechanism for a consecutive, renewed catheter retrieval manouvre) .
• the distal component of the present invention is installed. It may serve as a conventional hemostatic valve.
• the main catheter is first inserted into the proximal component of the proposed invention, then the guidewire, emerging at its proximal end from the distal component, is slidably inserted into the main catheter, which is then, inserted into the common channel of the distal component (through the primary hemostatic valve) , then, the guidewire, emerging at its proximal end from the distal component, is inserted retrograde into through the guidewire channel of the proximal component.
• This will achieve a status of free manourability of the main catheter relative to the guidewire which is fixed by the secondary valve at the proximal end of the guidewire channel of the proximal component of the invention.

Landscapes

• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Heart & Thoracic Surgery (AREA)
• Hematology (AREA)
• Anesthesiology (AREA)
• Biomedical Technology (AREA)
• Engineering & Computer Science (AREA)
• Pulmonology (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Biophysics (AREA)
• Media Introduction/Drainage Providing Device (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=3500884

Family Applications (1)

Country Status (2)

Cited By (1)

Citations (4)

• 1997
  • 1997-05-15 AT AT83597A patent/AT405908B/de not_active IP Right Cessation
• 1998
  • 1998-05-14 WO PCT/IB1998/000725 patent/WO1998051364A1/en active Application Filing

Patent Citations (4)

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