摘要:
A tubular access sleeve and suction tool for accessing an anatomic surface or anatomic space and particularly the pericardium to access pericardial space and the epicardial surface of the heart in a minimally invasive manner are disclosed. A suction tool trunk extending through a suction tool lumen of the sleeve is coupled to suction pads at the ends elongated support arms. The suction pads can be retracted into a sleeve working lumen during advancement of the access sleeve through a passage and deployed from the tubular access sleeve lumen and disposed against the an outer tissue layer. Suction can be applied through suction tool lumens to suction ports of the suction pads that fix to the outer tissue layer so as to tension the outer tissue layer and/or pull the outer tissue layer away from an inner tissue layer so that the anatomic space can be accessed by instruments introduced through the working lumen to penetrate the outer tissue layer.
摘要:
A disposable tissue removal device comprising a cutting element mounted to a handpiece. The cutting element includes an outer cannula defining a tissue-receiving opening and an inner cannula concentrically disposed within the outer cannula. The outer cannula has a trocar tip at its distal end and a cutting board snugly disposed within the outer cannula. The inner cannula defines an inner lumen that extends the length of the inner cannula and terminates in an inwardly beveled, razor-sharp cutting edge. The inner cannula is driven by both a rotary motor and a reciprocating motor. At the end of its stroke, the inner cannula makes contact with the cutting board to completely sever the tissue. An aspiration vacuum is applied to the inner lumen to aspirate excised tissue through the inner cannula and into a collection trap that is removably mounted to the handpiece. The rotary and reciprocating motors are hydraulically powered through a hydraulic circuit. The hydraulic circuit includes a foot pedal that initiates aspiration vacuum, rotary motion and reciprocation of the inner cannula. The hydraulic circuit is configured so that the inner cannula closes the tissue-receiving opening before the foot pedal is depressed and automatically after the foot pedal is released.
摘要:
The present invention provides a mechanical injury device having cutting elements for injuring tissue and thereby creating electrical block that can prevent atrial fibrillation. These cutting elements may preferably be removable, breakaway, or simply integral to the injury device and may be delivered, for example, by catheter or hand tool.
摘要:
A rotary tissue-cutting instrument forming a laryngeal blade (3) includes an outer tubular member (14) having a hub (4), a proximal portion (150) having a longitudinal axis and extending distally from said hub to a proximal bend (151) curving in a first direction. An intermediate portion (152) extends distally at an angle to the longitudinal axis of said proximal portion (150) in a first plane. The intermediate section extends from the proximal bend (151) to a distal bend (153) curving in a second direction, and a distal portion (154) extends distally from the distal bend (153) in a second plane. The distal portion (154) extends to a distal end having an opening (16) therein. An inner member (15) is rotatably disposed in the outer tubular member (14) and has a proximal end for mounting to a powered handpiece and a distal cutting tip (17) disposed adjacent the opening (16), the inner member being flexible adjacent said distal and proximal bends.
摘要:
An ultrasonic surgical system enables connection of a hand switch as well as a foot switch, which is used to operate a driving signal generator, without the necessity of retrofitting a main unit including the driving signal generator used to drive an ultrasonic transducer incorporated in a connected handpiece. An extension unit is included for connecting the foot switch and hand switch to the main unit. The foot switch and hand switch are connected to the main unit via the extension unit.
摘要:
The present invention provides catheter apparatus and catheterization methodology for generating an arteriovenous fistula or a veno-venous fistula on-demand between closely associated blood vessels and at a chosen anatomic site in-vivo. The catheter apparatus is preferably employed in pairs, each catheter of the pair being suitable for percutaneous introduction into and extension through a blood vessel. The catheterization methodology employs the catheter apparatus preferably in conjunction with conventional radiological techniques in order to place, verify, and confirm a proper alignment, orientation, and positioning for the catheters in-vivo prior to activating the perforation means for generating a fistula. The invention permits the generation of arteriovenous fistulae and veno-venous fistulae anatomically anywhere in the vascular system of a patient; nevertheless, the invention is most desirably employed in the peripheral vascular system as exists in the extremities of the body to aid in the treatment of the patient under a variety of different medical ailments and pathologies.
摘要:
A surgical tool system (30) with a powered surgical handpiece (32). A removable handswitch (39) is attached to the handpiece. The handswitch includes a slip ring (192) that removably holds the handswitch to the handpiece. A lever arm (212) is pivotally attached to the slip ring. A magnet (190) is fitted in the lever arm. The angle of the lever arm is set by the surgeon to indicate the on/off state and operating speed of the handpiece. Internal to the handpiece is a sensor (94) that generates a signal based on the relative proximity of the magnet. The sensor signal is thus employed as the control signal for regulating the operation of the handpiece. Thus a surgeon can selectively use the handpiece with or without the mounted control switch.
摘要:
In scissors, in particular, for surgical purposes, comprising two branches pivotable relative to one another, each of which has a cutting section with a cutting edge at the front end thereof and a handle section at the rear end thereof, in order to simplify manufacture thereof, it is proposed that at least one of the branches be joined in its cutting section on its inner surface facing the other branch to a metal foil lying flat thereon and extending at least at the cutting edge end of the inner surface as far as this cutting edge end or projecting slightly over this, with the edge of the metal foil arranged at this end of the inner surface forming the cutting edge of this inner surface.
摘要:
An end effector of an ultrasonic surgical instrument is provided, the ultrasonic surgical instrument having a manipulatable structure, a body portion operatively connected to the manipulatable structure and having a distal end, a transducer, and the end effector being supported on the distal end of the body portion, the end effector including a plurality of resonant member elements, each resonant member operatively connected to a transducer of the plurality of transducers for effecting vibrations along the length of the resonant member, and including an operating surface configured to effect tissue dissection, cutting, coagulation, ligation and/or hemostasis, wherein a displacement curve associated with the vibrations of a first one of the plurality of resonant members is offset relative to the displacement curve associated with the vibrations of a second one of the plurality of resonant members.
摘要:
A protective sheath for a disposable surgical scalpel includes at least three modes of operation, (i) a protective mode, (ii) an open mode, and (iii) a permanently locked mode. In the open mode, a locking strip of the scalpel handle resides in one opening of the sheath to keep the sheath substantially immobile during use of the scalpel blade. In the protective mode, the locking strip resides in a second opening of the sheath to keep the sheath substantially immobile when the scalpel blade is not in use. In the permanently locked mode, a button connected to the sheath is depressed into the second opening and engages the locking strip, thereby preventing the blade from being used and allowing the scalpel to be safely disposed.