An infusion pump is a medical device designed to deliver fluids, medications, nutrients or other prescribed solutions to a patient at a controlled and accurate rate. Infusion pumps are used when precise control of the volume and rate of fluid delivery is required. Depending on the design and intended application, infusion pumps can deliver fluids through different routes, including intravenous (IV), subcutaneous, enteral and other specialized routes. At Ntek Biomed Australia, we service and maintain a range of infusion equipment used across healthcare, aged-care and community-care environments.

Volumetric IV infusion is the controlled delivery of a measured volume of fluid or medication directly into a patient's intravenous circulation.

A volumetric infusion pump generally delivers fluid from a standard IV administration set at a programmed flow rate, commonly expressed in mL/hour. The pump continuously monitors the delivery process and may provide alarms for conditions such as occlusion, air in the line, completion of infusion or other detected abnormalities.Volumetric IV infusion is commonly used when maintaining a controlled and consistent infusion rate is clinically important.

A volumetric infusion pump uses a mechanical pumping mechanism to move fluid through an IV administration set at a controlled rate.

Depending on the pump design, the pumping mechanism may use technologies such as:

• Peristaltic pumping
• Linear peristaltic mechanisms
• Cassette-based pumping systems
• Other manufacturer-specific pumping mechanisms

The clinician programs parameters such as the required flow rate, volume to be infused and, where applicable, other delivery limits or alarm settings. Sensors and monitoring systems continuously assess pump operation and help detect conditions that could interrupt or affect delivery.The exact programming procedure and operating parameters vary between manufacturers and models and should always follow the applicable manufacturer's instructions and clinical procedures.

Volumetric infusion pumps are used in a wide range of healthcare environments, including:

• Hospitals and acute-care facilities
• Emergency and critical-care environments
• Operating theatres
• Medical and surgical wards
• Pediatric and neonatal care
• Aged-care facilities
• Community and home healthcare
• Medication and fluid therapy

They may be used for the controlled administration of IV fluids, prescribed medications, electrolytes, nutrition and other compatible solutions, depending on the pump's intended purpose and clinical application.

Infusion pumps come in several configurations; each designed for particular applications.

Designed to deliver relatively larger volumes of fluid through an administration set, commonly for IV therapy.

Use a syringe as the fluid reservoir and provide highly controlled delivery of relatively small volumes. These are commonly used for continuous medication delivery, including continuous subcutaneous infusion (CSCI).

Patient-Controlled Analgesia (PCA) pumps allow appropriately prescribed doses of analgesic medication to be administered according to programmed safety limits.

Other specialized pump systems are designed for applications such as enteral feeding, neonatal care or other specific clinical requirements.

Regular preventive maintenance is an important part of keeping infusion equipment safe, reliable and fit for its intended use.

Depending on the equipment and manufacturer's requirements, preventive maintenance may include:

• Visual and physical inspection
• Inspection of the pump mechanism
• Inspection of doors, clamps and locking mechanisms
• Inspection of power supply and cables
• Battery condition assessment
• Alarm and sensor checks
• Functional testing
• Flow-rate and delivery performance checks
• Electrical safety testing, where applicable
• Inspection for signs of contamination, damage or wear
• Verification of labels and identification
• Review of previous service history

The scope and frequency of maintenance should be determined according to the manufacturer's service requirements, risk assessment, equipment condition and the healthcare organization's maintenance procedures.

Infusion pump accuracy is critical because the programmed delivery rate needs to correspond with the actual fluid delivery within the applicable performance requirements. Ntek Biomed Australia can perform calibration and performance testing using appropriate test equipment and procedures. Testing may include assessment of:

• Flow-rate accuracy
• Volume delivery
• Occlusion alarm operation
• Air-in-line detection, where fitted
• Alarm functionality
• Battery operation
• Display and controls
• Overall functional performance

Following testing, service results can be documented and appropriate service or calibration records provided.

Important: Calibration limits and test methods vary between pump models. Testing should therefore be performed according to the manufacturer's specifications, applicable standards and appropriate biomedical engineering procedures.

Infusion pumps operate with a combination of mechanical, electronic and sensing systems. Common faults can include:

• Occlusion alarms
• Air-in-line alarms
• Door or cassette errors
• Inaccurate flow delivery
• Battery failure or reduced battery capacity
• Failure to power on
• Intermittent operation
• Damaged power cables or connectors
• Faulty sensors
• Display or keypad problems
• Pump mechanism wear
• Excessive noise or abnormal mechanical operation
• Communication or configuration errors

Some faults may be caused by incorrect setup or consumables rather than an internal pump failure. Proper fault diagnosis is therefore important before replacing components.

Ntek Biomed Australia provides preventive maintenance, fault diagnosis, repair, performance testing and calibration for selected infusion pumps and syringe drivers. Our goal is to help healthcare Organisation maintain their infusion equipment in a safe, reliable and serviceable condition, with appropriate documentation of maintenance and testing activities.