Visionstar HV-300B

Bipolar Vessel Sealing

The manufacturer describes permanent sealing of blood vessels up to 7mm in diameter under bipolar coagulation using the seal safe modes, so a vessel can be dealt with using the instrument already in hand.

Five Working Modes

Pure cut, blend, fulgurate, spray and bipolar standard coagulation are each listed with their own rated load, output ceiling, peak voltage and crest factor.

Monopolar Cutting Output

Pure cut reaches 300W into 500 ohms at 1900V peak to peak with crest factor 1.6. Blend reaches 250W at 2300V with crest factor 2.5.

Monopolar Coagulation Output

Fulgurate reaches 120W into 500 ohms at 2800V with crest factor 2.9. Spray reaches 100W at 7000V with a crest factor of 6.2, the highest of the five.

Bipolar Output

Bipolar standard coagulation is listed at 100 ohms rated load, 70W maximum output, 550V peak to peak and a typical crest factor of 1.6, matching the pure cutting waveform at a far lower power.

Rapid Tissue Response

The manufacturer describes sampling current and voltage 450,000 times each second and responding to tissue impedance changes in less than 10 milliseconds, which it presents as its own proprietary technology.

Eight Inch Touch Screen

A wide TFT LCD touch screen of 8 inches carries all diathermy functions, with settings changed by touching icons and no additional buttons or knobs fitted.

Self Test and Electrode Monitoring

A comprehensive internal self test runs once the console is switched on, and return electrode monitoring watches patient impedance continually during use.

Vessel Sealing in Open and Minimally Invasive Work

Sealing vessels up to a stated 7mm under bipolar control is the capability that distinguishes this console. Where a surgeon would otherwise reach for ligatures or clips, a sealing mode addresses the vessel with the instrument already in hand. The manufacturer's diameter figure is its own claim, and whether the technique suits a given vessel and patient remains entirely a surgical judgement that no listing should attempt to inform. The capability is stated here, not recommended.

Cutting and Coagulation Across a Range

Four monopolar modes span pure cut at 300W through blend at 250W to fulgurate at 120W and spray at 100W, with peak voltages rising from 1900V to 7000V and crest factors from 1.6 to 6.2 as the waveform moves from continuous cutting toward interrupted coagulation. That spread lets one console serve dissection and haemostasis without the team changing equipment between them or reaching for a second console mid procedure.

Specialties Named by the Manufacturer

The card lists general surgery, gastroenterology, dermatology, vascular surgery, obstetrics and gynaecology, heart and thoracic surgery, ORL and ENT, minimally invasive surgery, cerebral and neurosurgery, orthopaedics, plastic surgery and transurethral resection. An underwater cut socket for endoscopic cutting is listed separately, which bears directly on the transurethral resection work named in that list.

Working Within an Equipment Set

Stated compatibility covers argon plasma coagulation equipment, a smoke evacuation system and the underwater cut socket. A generator that integrates with what a theatre already owns avoids a set of separate purchases, though the specific systems named on the card are not reproduced here and compatibility should be confirmed against your own equipment before anything is committed to.

Waveform Character Published, Not Just Wattage

Crest factor is listed for every mode alongside rated load, output ceiling and peak voltage. That is unusually complete for a specification sheet, and it is the information that actually distinguishes one coagulation mode from another, since a crest factor of 6.2 in spray describes a very different waveform from 1.6 in pure cutting. A biomedical department comparing generators can work from these figures rather than from marketing language.

Monitoring That Responds Rather Than Reports

Sampling current and voltage 450,000 times per second with response to impedance change in under 10 milliseconds describes a control loop that adjusts during application rather than measuring afterwards. Combined with return electrode monitoring and a self test at switch on, the console is designed to detect and act rather than to record. These are the manufacturer's descriptions and warrant checking against your own governance standards.

One Interface for Everything

A wide touch screen carrying all functions, with no separate knobs or buttons, reduces the number of controls a team has to learn and the number of things that can be knocked out of position mid procedure. Selectable interface languages extend that to teams working in more than one language, which matters in departments with international staff or rotating theatre teams who may not share a first language.

The Visionstar HV-300B is a five mode diathermy console with vessel sealing among its capabilities. Pure cut reaches 300W into 500 ohms at 1900V with crest factor 1.6, blend 250W at 2300V, fulgurate 120W at 2800V, spray 100W at 7000V with crest factor 6.2, and bipolar standard coagulation 70W into 100 ohms at 550V. Main frequency is 512 KHz, an 8 inch touch screen carries every function, and the manufacturer describes sealing of vessels up to 7mm, sampling at 450,000 times per second, response under 10 milliseconds, an automatic self test and continuous return electrode monitoring.

Several things are deliberately absent. The leakage measurements printed on the card are not reproduced, since these are tested characteristics a supplier should confirm rather than a listing assert. A proprietary name belonging to another manufacturer, applied on the card to the sealing feature, is likewise not used, nor are the named compatible systems. Electrical supply, weight and dimensions do not appear on the material held. Nothing here should be read as a claim about testing or regulatory approval.

If your theatre is specifying a generator with sealing capability and wants the mode data, safety documentation and compatibility checked properly, speak to Medigear.uk. As a verified medical equipment supplier working across medical, dental, rehabilitation and aquatic therapy settings, the team will confirm what this console offers and what commissioning it would involve.