Specification builder · Tier B
High-frequency electrosurgical generator (diathermy) for monopolar and bipolar surgery with return-electrode contact monitoring, optional vessel sealing, argon plasma coagulation and endoscopic modes
A diathermy machine uses high-frequency electric current to cut tissue and stop bleeding through a pencil (monopolar, with a return plate on the patient) or a forceps (bipolar). Every operating theatre needs one, from THQ caesarean lists to tertiary laparoscopic, endoscopy and urology suites. The key tender decisions are power and modes, return-plate contact monitoring to prevent burns, whether vessel sealing or argon is really needed, and the long-term price of plates and sealing instruments.
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Standards this specification draws on
- IEC 60601-1 General basic safety and essential performance of medical electrical equipment.
- IEC 60601-2-2 Particular requirements for high-frequency surgical equipment: output power accuracy, HF leakage, return-electrode monitoring, activation signals and footswitch safety.
- IEC 60601-1-2 Electromagnetic compatibility so the generator does not disturb monitors and other theatre equipment and is not disturbed by them.
- IEC 60601-1-6 Usability engineering so controls, displays and alarms are hard to misuse.
- IEC 62304 Software life-cycle for the control, impedance-feedback and vessel-sealing software.
- ISO 14971 Risk management for medical devices.
- ISO 13485 Quality management system of the manufacturer.
- IEC 62353 Recurrent and after-repair electrical safety testing of medical electrical equipment.
- ISO 16571 Systems for evacuation of plume generated by medical devices.
- DRAP Medical Devices Rules 2017 Registration required to import and sell medical devices in Pakistan.
Common mistakes in tenders for this equipment
- Naming a maker's trademarked contact-monitoring, sealing or cut-mode names instead of the measurable function (split-plate impedance monitoring with cut-off, sealing of vessels up to 7 mm, fractionated endoscopic cut); this copies one brand and excludes equal products.
- Asking for 400 W cut, 10+ processors or a fixed number of named modes copied from one brochure; these narrow the field without any clinical gain.
- Buying a vessel-sealing generator without pricing the sealing instruments: some generators accept only single-use instruments from one source, and the instruments cost more than the generator within a year.
- Forgetting split return plates, pencils and bipolar forceps, or accepting a generator that works only with one maker's plates.
- No output-power and HF leakage acceptance test with a calibrated electrosurgical analyser, so a unit delivering the wrong power or leaking current is never detected.
- Accepting refurbished or end-of-life models, or valve-era units without contact monitoring; require new, current-production generators with 10-year parts support.
- Accepting DRAP registration of a different model or of the generator only; the exact model and offered modules (sealing, argon) must be covered.
- Paid software activation of vessel sealing, argon or endoscopic modes after delivery; require every specified function fully licensed in the bid price.