Specification builder · Tier C
General-purpose cart-based ultrasound system with colour, power, PW and CW Doppler (entry, mid-range and premium configurations)
A cart-based ultrasound scanner that makes real-time images of the abdomen, pregnancy, pelvis, thyroid, breast, muscles, blood vessels and the heart, and measures blood flow with colour and spectral Doppler. Public hospitals from THQ to tertiary level, private hospitals and diagnostic centres buy it as their main imaging workhorse. The key tender decisions are the system class, the probe set, which advanced tools (elastography, contrast, 3D/4D) are really needed, and keeping probes inside the warranty and maintenance contract.
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Standards this specification draws on
- IEC 60601-1 General electrical and mechanical safety of medical electrical equipment.
- IEC 60601-1-2 Electromagnetic compatibility, so images are not disturbed by and do not disturb nearby equipment.
- IEC 60601-2-37 Particular safety requirements for ultrasonic diagnostic and monitoring equipment, including acoustic output limits and on-screen MI/TI display.
- IEC 62359 Test methods for the thermal and mechanical indices that tell the operator how much ultrasound energy reaches the patient.
- IEC 61157 Standard way for the manufacturer to declare the acoustic output of each transducer and mode.
- ISO 10993-1 Biological safety of transducer materials that touch skin and mucosa, including endocavity probes.
- IEC 62304 Software life-cycle control for the system's imaging, measurement and networking software.
- ISO 14971 Manufacturer's risk management for hazards such as overheating probes, wrong measurements and data loss.
- ISO 13485 Certified quality management system of the manufacturer.
- DICOM (NEMA PS3) Standard for sending images and structured measurements to PACS and receiving worklists.
- IEC 62353 Electrical safety testing at installation, after repair and during preventive maintenance.
- DRAP Medical Devices Rules 2017 Pakistan's legal requirement for registration/enlistment and import of medical devices.
Common mistakes in tenders for this equipment
- Copying one brand's brochure: naming its trademarked imaging modes, probe model numbers, exact channel counts or 'digital channel' figures and frame rates that only one platform quotes. Specify clinical functions and frequency ranges with 'not less than' values.
- Asking for a huge 'processing channels' or 'dynamic range' number. Makers measure these differently, the figures cannot be checked at acceptance, and they are often used to exclude competitors.
- Listing many probes as standard when only two or three are used daily. Each extra probe adds a lot to the price; buy specialist probes only for departments that will use them.
- Leaving the probes out of the warranty and CMC. Dropped or cracked probes are the most common and costliest repair, and some contracts cover only the main unit.
- Buying advanced options (contrast, fusion, 3D/4D) as 'upgradeable' without pricing them. Ask for every option, licence and probe to be priced in the bid and held for 5 years.
- No acceptance test. Without a phantom image-quality test and electrical safety record at installation, a weak probe or dead elements cannot be proven later.
- Accepting DRAP registration of the brand or of a different model; the exact offered system and its transducers must be covered.
- Forgetting endocavity probe disinfection, biopsy guides, gel and printer paper, so the scanner cannot be used safely or fully on delivery.