Specification builder · Tier B
Resting 12-lead diagnostic electrocardiograph with 3/6/12-channel printing, automatic interpretation, storage and data export
A resting ECG machine records the heart's electrical activity from 10 electrodes and prints all 12 leads side by side, with automatic measurements and a suggested interpretation. Hospitals buy them for OPD, wards, emergency, CCU and pre-operative checks, and primary-care facilities (BHU/RHC) use them to screen chest pain and refer heart attacks quickly. The main tender decisions are diagnostic signal quality, interpretation level (with or without STEMI alert), battery, and how ECGs are exported (PDF, DICOM, HL7) without locking the hospital to one brand.
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Standards this specification draws on
- IEC 60601-1 General basic safety and essential performance of medical electrical equipment (leakage current, insulation, mechanical safety).
- IEC 60601-1-2 Electromagnetic compatibility, so the ECG stays clean near diathermy, phones, monitors and other equipment.
- IEC 60601-2-25 Particular standard for diagnostic electrocardiographs: accuracy, frequency response, noise, CMRR, defibrillation protection, pacemaker pulse display and automated measurement accuracy (a combined ECG standard, IEC 80601-2-86, is still in draft; accept it when published).
- IEC 62304 Software life-cycle for the acquisition, measurement and interpretation software.
- ISO 14971 Risk management for medical devices.
- ISO 13485 Quality management system of the manufacturer.
- IEC 62353 Electrical safety testing at installation, after repair and at preventive maintenance.
- DICOM PS3 (12-lead ECG waveform and Modality Worklist) Open standard for sending ECG waveforms to PACS and receiving patient orders, where DICOM export is ordered.
- HL7 v2.x Standard messaging for ECG orders and results with the hospital information system, where ordered.
- AHA/ACCF/HRS Recommendations for the Standardization and Interpretation of the ECG, Part I (2007) Clinical reference for diagnostic bandwidth (0.05-150 Hz adults, 250 Hz children), filtering and lead labelling.
- WHO list of priority medical devices for management of cardiovascular diseases and diabetes (2021) WHO reference listing of the electrocardiograph and its basic technical requirements for different care levels.
- DRAP Medical Devices Rules 2017 Registration/enlistment required to import and sell medical devices in Pakistan.
Common mistakes in tenders for this equipment
- Copying one brand's brochure: naming its interpretation program, a screen size to the decimal, a sampling rate only one model quotes (for example 32,000 or 75,000 samples/s) or one maker's paper size. Ask for the diagnostic bandwidth, CMRR and IEC 60601-2-25 compliance instead.
- Asking for culprit-artery localisation, synthesised 18-lead ECG or paperless operation on every machine when only a cath lab or a few cardiologists need them; this leaves one or two eligible makers.
- Accepting 'interpretation optional' or 'STEMI module extra': the machine arrives without the interpretation licence. Require measurement and interpretation fully licensed in the bid price.
- Forgetting the running cost of thermal paper: some machines take only one maker's paper at a high price. Ask for the paper unit price for 3 years and whether other paper sources work.
- Buying networked machines but no management software, PACS/HIS interface or licences, so ECGs still go round on USB sticks. Specify the software, licences and interfaces in the same tender.
- Not specifying paediatric electrodes and the wider paediatric bandwidth, so the machine cannot record good ECGs on infants.
- Accepting battery life 'up to X hours' measured with the screen off and no printing. Ask for printed ECGs per charge or continuous operating time with the test conditions stated.
- Accepting DRAP registration of a different model or of the brand only; the exact offered model must be covered.