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A principal goal in PPV is to minimize vitreous traction by removing only the target ocular tissue, without inadvertently drawing unwanted tissue asssociate the vitrectomy probe port or creating distant traction that might cause iatrogenic retinal tears or other complications.
Initially, these tests were performed with water. A prospective single-centre clinical study assessed duration of core vitrectomy procedure using a TDC vitrectome versus a standard single-cut guillotine vitrectome; the results reveal shorter associaet times using a double-cutting TDC vitrectomy probe. To receive assodiate and publication updates for Journal of Ophthalmology, enter your email address in the box below. Inclusion assoicate were chosen to ensure adherence to a similarity principle, with similar vitreous liquefaction, similar case duration and difficulty, similar vitreous volume, and similar overall ocular conditions having had no prior ocular surgical intervention.
Introduction The general principle of pars plana vitrectomy PPV surgery is to ensure complete vitreous removal with no residual vitreous left following the procedure. Aspiration flow rates remained constant independent of TDC vitrectome cut rate, while flow rates decreased linearly at higher cutter speeds using a classic single-blade vitrectome.
Indexed in Science Citation Index Expanded. Table 2 tabulates the mean duration of core vitrectomy procedures for each surgical intervention group assessed.
Endotron Geuder AG. Max Cut Speed cpm. In the author in cooperation with DORC International developed a newer vitrectome design, introducing a modified vitreous cutter technology called two-dimensional cutting TDC vitrectome system, launched in conjunction with the EVA ophthalmic surgical platform, a new aspiration system designed to provide both flow and vacuum control mode associste for enhanced intraoperative fluidics stability.
Both parts have an opening in the tube, allowing dord aspiration of tissue during a complete cutter cycle movement.
Performance of the new generation gauge and gauge TDC vitrectomes was analyzed relative to the current generation or standard gauge and gauge cutter. In the comparative case series clinical study, the mean duration of core vitrectomy procedures using gauge and gauge TDC vitreous cutter system was statistically significantly shorter than the mean operating duration for core PPV performed utilizing a standard single-cut vitrectome of the same gauge.
During a cycle in which the inner part performs a back-and-forth movement in the outer part, a cutting movement occurs twice. Vitrectomy surgery performed using a TDC vitrectome was faster than core vitrectomy utilizing a standard single-action assodiate at similar cut speeds.
A total of 80 patients were enrolled, with equal numbers, or 20 eyes, randomly allocated to one of four surgical treatment groups: Max Vaccum Not specified. The concept of a double-action surgical cutting probe has only recently been developed and incorporated into modern vitrectomy instrumentation probes that feature 2 cutter openings in the guillotine shaft, thereby performing a vitreous cutting action on both forward and backward stroke of the probe device.
Findings from this small comparative case series assessment are supportive of the efficiency of TDC vitrectome technology and of faster cut speeds for vitrectomy surgery. The concept of a double-cutting instrument for use in ophthalmic surgery was first patented in [ 4 ]. References made in article may indicate usage of medical equipment or drugs at dosages, for periods of time, and in combination not included in the current prescribing information.
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Owing to the increased cutting and snipping capacity, the surgical intervention can be shortened and, moreover, the traction exerted on the ocular tissue drawn in during the aspiration phase decreases while the suction flow increases.
Journal of Ophthalmology
Time measurement of core vitrectomy duration was made by a secondary person without a need to change standard vitrectomy procedures of PPV for epiretinal membrane removal. We report below the methodologies and findings from in vitro comparisons of aspiration flow dynamics utilizing TDC and standard vitrectomes connected to different surgical platforms, together with methods and results of a prospective surgical case series study evaluating duration forc core vitrectomy associaet and therefore comparative flow efficiency performance, using a TDC vitrectome system versus standard vitreous cutter system.
Faster operating times offer the potential of reduced costs as well quicker postoperative rehabilitation [ 14 ]. The degree of retinal traction created by vitrectomy cutters is influenced by the effect of time of assocjate, distance from the retina, and cutting rate.
Alterations in geometrical design and size of vitrectomy probe, together with duty cycle, which is the proportion of time the cutter port is open rather than closed relative to a complete opening and closing surgical cutting cycle, and cutting speed provide additional performance capabilities for more efficient and safer surgery. Results suggest significantly decreased operating time for core vitrectomy. Reported findings suggest that a TDC vitrectomy probe provides greater operating efficiency than conventional vitreous cutter instrumentation during sutureless small-gauge vitrectomy.
Company Information Forc the company for additional information, availability, or pricing: This necessitates higher infusion and aspiration pressures to remove vitreous when using smaller-gauge vitrectomes. corc
Associate Vitrectomy & Phaco System – DORC Intenational BV, Chennai | ID:
Subscribe to Table of Contents Alerts. The same tests were then performed using artificial vitreous humor as aspirating fluid.
A first cutting movement occurs by cooperation of the distal end of the inner part with the distal asspciate edge of the outer part. At-a-Glance Dual system, phaco and vitrectomy Twin pump system, peristaltic and venturi Programmable dual linear footswitch.
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The second cutting movement is realized through cooperation of the distal cutting edge of the inner part with the proximal cutting edge of the outer part.
Nearly two decades on, it was suggested that a dual port vitreous cutter system might allow surgeons to perform bulk vitrectomy more efficiently [ 5 ]. The outer part has a closed distal end and the inner part an open distal end. In vitro tests demonstrate that a more predictable and consistent flow of vitreous around the instrument probe is achieved using a TDC vitrectome compared with a regular vitrectome system.
Megatron Cool Geuder AG. Mean duration of core vitrectomy operating time for gauge and gauge surgeries utilizing either a standard single-cut or a TDC vitrectome. The axial position of the distal cutting edge of the inner part as a function of associats circumferential direction initially proceeds towards the proximal end and then back to the distal end again.