Heart-lung machines

Choosing a heart-lung machine is an extremely important and responsible task that requires considering many factors:

• Type of machine
• Technical specifications.
• Functionality and features.
• Reliability and maintenance.

The choice of a heart-lung machine requires a detailed analysis and a thoughtful approach. Cooperation with experienced suppliers and consultation with experts will help you make the right choice and ensure a high level of medical care.

The main components of a heart-lung machine (HLM) include:

• Pump (peristaltic or roller): ensures blood circulation through the circuit.
• Oxygenator: performs the function of the lungs, saturating the blood with oxygen and removing carbon dioxide.
• Blood reservoir: serves to accumulate blood and maintain a constant blood volume in the system.
• Heat exchanger: regulates the blood temperature, keeping it at an optimal level for the body.
• Blood circuits: tubes through which blood circulates between the various components of the machine and the patient’s body.
• Monitors and sensors: track blood parameters, such as pressure, oxygen saturation, and temperature, to ensure patient safety.
• Filters: remove microemboli and other unwanted particles from the blood.
• Management and control systems: provide precise regulation and control of the operation of all HLM components.

The main differences between a traditional and a modern heart-lung machine include the following aspects:

• Technological innovations.
• Safety and efficiency.
• Size and mobility.
• Energy efficiency.
• Integration with other medical devices.
• Management and monitoring.

A heart-lung machine (HLM) is a critically important tool in cardiac surgery, which provides blood circulation and oxygenation support during heart surgeries. In recent years, many significant improvements have occurred in this field due to the use of advanced technologies:

• Membrane oxygenators. They use membranes that allow gas exchange between blood and oxygen, providing more efficient blood oxygenation compared to traditional methods.
• Digital control and monitoring. Modern HLMs are equipped with digital control systems that allow surgeons to fine-tune blood circulation parameters, such as flow rate and oxygenation level. This increases precision and safety during operations.
• Miniaturization of components. Modern machines have become more compact, which allows reducing the volume of space taken up in the operating room and reducing the trauma of the procedure for the patient.
• Biocompatible materials. The use of new materials that are more compatible with biological tissues helps reduce the risk of thrombosis and other complications.
• Automation. New HLM models are equipped with automatic management systems that can independently adjust blood circulation parameters in real-time, reducing the workload on medical staff and increasing the reliability of the machine’s operation.
• Integration with other medical systems. HLMs can be integrated with other medical devices, such as vital sign monitoring systems, providing a comprehensive approach to managing the patient’s condition during surgery.

Technical maintenance and inspection of a heart-lung machine (HLM) are critically important for ensuring its safe and efficient operation. Recommendations regarding the frequency of maintenance may vary depending on the manufacturer and specific model, but general recommendations include:

• Daily checks: Before each use, the machine must be thoroughly checked for any visible damage, the correct connection of all components, and the functionality of all systems. This includes checking fluid levels, power supply, and all indicators.
• Weekly maintenance: Weekly checks may include a more detailed diagnosis, which may cover testing all electronic and mechanical components, replacing or cleaning filters and other consumables, and checking the system for any problems.
• Monthly maintenance: Once a month or more often, depending on the intensity of use, the machine should undergo full technical maintenance. This includes checking all major components, calibrating sensors and detectors, checking the software, and updating to the latest versions.
• Annual technical maintenance: Annually, the machine must undergo full diagnostics and maintenance performed by certified technical personnel. This may include replacing critical components, updating software, and conducting all necessary tests to confirm its full functionality and safety.