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The VESSEL EVERTER System is indicated for use with the Microvascular Anastomotic COUPLER and FLOW COUPLER Device in the anastomosis of only arteries normally encountered in microsurgical procedures only in the peripheral vascular system. The VESSEL EVERTER System is indicated for use with COUPLER and FLOW COUPLER System sizes from 2.0 to 4.0 mm.

Two accessory devices comprise the Vessel Everter System: Vessel Everter and Sizing Guide. The Vessel Everter system is an accessory device to the GEM FLOWCOUPLER System, a pair of implantable rings that are used for end-to-end anastomosis of veins and arteries normally encountered in microsurgical and vascular reconstructive procedures. The Vessel Everter System are two non-implantable, sterile, single use hand-held devices that facilitate sizing and use of the GEM FLOWCOUPLER System. The Vessel Everter is comprised of a handle with two soft silicone end effectors (tips), one on each end. The instrument handle features two separate silicone end effectors, each of a different size, intended to be used at the surgeon's discretion. The Vessel Everter end effector is designed with a narrowing tip to allow for engagement with multiple sizes of vessels, corresponding with a coupler size of 2.0-4.0 mm rings. The Vessel Everter is used to press vessel tissue onto the GEM FLOWCOUPLER rings. To accomplish this, the surgeon presses the Vessel Everter into the tissue, flaring the tissue onto and over the Coupler locking pins. The Sizing Guide is a hard, plastic handle featuring holes on either end through which the vessel's outer diameter may be measured. The holes' diameters are intended to match the inner diameters of the various GEM FLOWCOUPLER rings. The holes correlate to vessel diameters of 2.0 mm to 4.0 mm in 0.5 mm increments. The surgeon may use the sizing guide to guide the selection of which coupler they will use for each particular anastomosis. The Sizing Guide is used by placing the vessel on the sizing guide and comparing the vessel diameter to the holes in the Sizing Guide. The Vessel Everter and Sizing Guide are sterilized by ethylene oxide and are provided sterile for-single-patient use. The Vessel Everter and Sizing Guide are not implantable and are disposed of after single use. The parent device, GEM FLOWCOUPLER System, remains unchanged and is not addressed in this submission.

The FLOW COUPLER Device is a single use, implantable device that is intended to be used in the end-to-end anastomosis of veins and arteries normally encountered in microsurgical and vascular reconstructive procedures. The FLOW COUPLER Device includes a pair of permanently implanted rings which secure the anastomosis and a removable Doppler probe that is press-fit onto one of the rings. When the FLOW COUPLER Device is used in conjunction with the FLOW COUPLER Monitor, the FLOW COUPLER System is intended to detect blood flow and confirm vessel patency intra-operatively and post-operatively at the anastomotic site. Post-operatively, blood flow can be detected on an as needed basis for up to 7 days. The FLOW COUPLER Doppler probe is not intended to be a permanent implant and should be removed 3 to 14 days post- operatively.

The FLOW COUPLER Device and System consists of a FLOW COUPLER Device and a FLOW COUPLER Monitor. The FLOW COUPLER Monitor is a pulsed Doppler ultrasound system designed for the detection of blood flow in vessels. The FLOW COUPLER Device includes a 20MHz ultrasonic Doppler transducer (probe) attached to one of the FLOW COUPLER rings, and an external lead. The probe via the external lead connects to the monitor and emits a pulsed ultrasonic signal. A varying audible signal is produced when the probe detects flow.

The Flow COUPLER Device is a single use, implantable device that is intended to be used in the end-to-end anastomosis of veins and arteries normally encountered in microsurgical and vascular reconstructive procedures. The Flow COUPLER Device includes a pair of permanently implanted rings which secure the anastomosis and a removable Doppler probe that is press-fit onto one of the rings. When the Flow COUPLER Device is used in conjunction with the Flow COUPLER Monitor, the Flow COUPLER System is intended to detect blood flow and confirm vessel patency intra-operatively and post-operatively at the anastomotic site. Post-operatively, blood flow can be detected on an as needed basis for up to 7 days. The Flow COUPLER Doppler probe is not intended to be a permanent implant and should be removed 3 to 14 days post-operatively.

The Flow COUPLER System consists of a Flow COUPLER Device and a Flow COUPLER Monitor. The Flow COUPLER Device is a sterile, single-use implantable pair of rings molded out of high density polyethylene with stainless steel pins on each ring. The Flow COUPLER Device is designed to serve as a mechanical, sutureless device for connecting veins or arteries. A probe-holder feature is molded on one Flow COUPLER ring and serves as the press-fit point of attachment for a pre-attached 20 MHz Doppler probe. The Doppler probe connects to the Flow COUPLER Monitor unit, via the external lead. The Flow COUPLER Monitor and Doppler probe is a pulsed Doppler ultrasound system designed for the detection of blood flow in vessels. An audible ultrasonic signal is produced when the Doppler probe detects blood flow. The Flow COUPLER Device and System has been specifically designed for use in end-to-end anastomosis of blood vessels and the detection of blood flow at the anastomotic site. On an as needed basis, blood flow can be detected for up to 7 days. The Flow COUPLER rings are intended to be a permanent implant. The Flow COUPLER probe is not intended to be a permanent implant; the probe should be removed, by gentle traction on the external lead, 3 to 14 days post-operatively.

The Flow COUPLER Device is a single use, implantable device that is intended to be used in the end-to-end anastomosis of veins and arteries normally encountered in microsurgical and vascular reconstructive procedures. The Flow COUPLER Device includes a pair of permanently implanted rings which secure the anastomosis and a removable Doppler probe that is press-fit onto one of the rings. When the Flow COUPLER Device is used in conjunction with the Flow COUPLER Monitor, the Flow COUPLER System is intended to detect blood flow and confirm vessel patency intraoperatively and post-operatively at the anastomotic site. Post-operatively, blood flow can be detected on an as needed basis for up to 7 days. The Flow COUPLER Doppler probe is not intended to be a permanent implant and should be removed 3 to 14 days post-operatively.

The Flow COUPLER System consists of a Flow COUPLER Device and a Flow COUPLER Monitor. The Flow COUPLER Device is a sterile, single-use implantable pair of rings molded out of high density polyethylene with stainless steel pins on each ring. The Flow COUPLER Device is designed to serve as a mechanical, sutureless device for connecting veins or arteries. A probe-holder feature is molded on one Flow COUPLER ring and serves as the press-fit point of attachment for a pre-attached 20 MHz Doppler probe. The Doppler probe connects to the Flow COUPLER Monitor unit, via the external lead. The Flow COUPLER Monitor and Doppler probe is a pulsed Doppler ultrasound system designed for the detection of blood flow in vessels. An audible ultrasonic signal is produced when the Doppler probe detects blood flow. The Flow COUPLER Device and System has been specifically designed for use in end-to-end anastomosis of blood vessels and the detection of blood flow at the anastomotic site. On an as needed basis, blood flow can be detected for up to 7 days. The Flow COUPLER rings are intended to be a permanent implant. The Flow COUPLER probe is not intended to be a permanent implant; the probe should be removed, by gentle traction on the external lead, 3 to 14 days post-operatively.

The FlowCOUPLER Device is a single use, implantable device that is intended to be used in the end-to-end anastomosis of veins and arteries normally encountered in microsurgical and vascular reconstructive procedures. The FlowCOUPLER Device includes a pair of permanently implanted rings which secure the anastomosis and a removable Doppler probe that is press-fit onto one of the rings. When the FlowCOUPLER Device is used in conjunction with the FlowCOUPLER Monitor, the FlowCOUPLER System is intended to detect blood flow and confirm vessel patency intra-operatively and post-operatively at the anastomotic site. Postoperatively, blood flow can be detected on an as needed basis for up to 7 days. The FlowCOUPLER Doppler probe is not intended to be a permanent implant and should be removed 3 to 14 days post-operatively.

The Flow COUPLER System consists of a Flow COUPLER Device and a Flow COUPLER Monitor. The Flow COUPLER Device is a sterile, single-use implantable pair of rings molded out of high density polyethylene with six stainless steel pins on each ring. The Flow COUPLER Device is designed to serve as a mechanical, sutureless device for connecting veins or arteries. A probe-holder feature is molded on one Flow COUPLER ring and serves as the press-fit point of attachment for a pre-attached 20 MHz Doppler probe. The Doppler probe connects to the Flow COUPLER Monitor unit, via the external lead. The Flow COUPLER Monitor and Doppler probe is a pulsed Doppler ultrasound system designed for the detection of blood flow in vessels. An audible ultrasonic signal is produced when the Doppler probe detects blood flow. The Flow COUPLER Device and System has been specifically designed for use in end-to-end anastomosis of blood vessels and the detection of blood flow at the anastomotic site. On an as needed basis, blood flow can be detected for up to 7 days. The Flow COUPLER rings are intended to be a permanent implant. The Flow COUPLER probe is not intended to be a permanent implant; the probe should be removed, by gentle traction on the external lead, 3 to 14 days post-operatively.

The VesseLink is to be used in the anastomosis of veins and arteries normally encountered in microsurgical and vascular reconstructive procedures. Excluded is the use for coronary artery anastomosis.

The VesseLink Microvascular Anastomotic Coupler (VesseLink) is a mechanical method for anastomosis, or connection, of small vessels ranging in size from 0.8 mm to 4.3 mm in outer diameter. The VesseLink is intended for use in the end-to-end and end to side vessel anastomosis as well as arterial/venous vein grafts. It is to be used in veins and arteries that are normally encountered in microsurgical and vascular reconstructive procedures. Excluded is the use for coronary artery anastomosis.

The Microvascular Anastomotic COUPLER is to be used in the anastomosis of veins and arteries normally encountered in microsurgical and vascular reconstructive procedures.

The device is a sterile (gamma irradiation), single-use, implantable pair of rings molded out of high density polyethylene with six stainless steel pins on each of the ring. A probe-holder feature is molded on each of the paired rings to be a point of attachment for a sensor/probe at the site of anastomosis.