Insights into accurate device performance with temperature sensors

When it comes to medicine and treatment therapies, every patient is unique, meaning that it is necessary to tailor treatments to each person's specific needs and adjust monitoring according to their individual requirements.

Insights into accurate device

Image Credit: Amphenol Advanced Sensors

This is especially true in critical care settings, where patients are most vulnerable, and the fine details of treatment greatly impact their immediate and long-term health outcomes.

Whether used for monitoring or performing a procedure, the accurate and reliable monitoring of key metrics, such as temperature, is key to the success of critical care.

Therefore, to allow medical professionals to deliver the highest level of care, temperature sensors and the medical devices they are installed in require the highest performance levels.

Temperature sensors and medical devices: Six applications

Similar to pressure sensors, temperature sensors are among the most important components in critical care medical devices. These sensors find application across a broad spectrum, ranging from patient monitors to ventilators.

They assist medical professionals in their life-saving endeavors by providing quicker response times and accurate readings of both patient conditions and device performance, mainly in the realms of:

  1. Cardiac care
  2. Skin surface
  3. Dialysis
  4. Respiratory care
  5. Thermometry
  6. Laser surgical assemblies

1. Cardiac care

In cardiac critical care, temperature sensors play a crucial role in monitoring a patient’s core body temperature and skin temperature at different locations. This data aids in the detection and management of temperature-related complications, including fever or hypothermia, which may arise during cardiac surgery or treatment.

During cardiac surgery, a procedure that demands meticulous patient monitoring, temperature sensors are frequently employed to track the patient’s core body temperature, which can be influenced by anesthesia and the surgical environment.

Aside from monitoring core body temperature, skin temperature sensors can also be utilized to observe the temperature of the hands and feet, serving as an early indicator of impaired cardiac function.

Changes in skin temperature may signify alterations in blood flow to the extremities, highlighting the need for timely interventions to maintain stable cardiac function.

How Amphenol sensors meet cardiac care applications: Amphenol offers small-diameter chip-in-glass or glass bead thermistor assemblies designed specifically for thermodilution catheters and continuous cardiac output systems. 

2. Skin surface

Temperature sensors find extensive use in critical care for monitoring skin surfaces. These sensors are typically placed on a patient’s forehead, chest, and other susceptible areas of the body that may be prone to infection, inflammation, or other medical concerns.

The primary objective of patient temperature monitoring is to identify any abnormalities that may indicate various health issues, such as fever or infection.

A body heat sensor of sorts, skin surface temperature sensors play a critical role in care for the most vulnerable of patients – premature infants. Temperature monitoring of these infants can be used to anticipate complications and provide the necessary interventions for stabilization.

Irrespective of the specific scenario, skin surface temperature monitoring also assists healthcare professionals in critical care settings:

  • Determine the effectiveness of treatments
  • Monitor trends in patient condition
  • Make any necessary changes to treatment plans accordingly

How Amphenol sensors meet skin surface temperature monitoring applications: Amphenol offers interchangeable thermistor assemblies with a temperature accuracy of ±0.05 °C @ 37 °C, suitable for continuous patient monitoring and neonatal incubator systems. 

3. Dialysis

Temperature sensors are essential components of dialysis machines. Their primary function is to measure the temperature of the dialysate, the solution that traverses the patient’s bloodstream to filter out toxins.

Maintaining safe temperatures is crucial, as excessively high or low temperatures can lead to health issues like hypothermia or overheating for the patient. By utilizing temperature sensors to continuously monitor the dialysate temperature, the dialysis process ensures adherence to safe parameters.

Certain dialysis machines employ heaters and coolers regulated by temperature sensor readings to maintain an optimal temperature range throughout the treatment. This proactive approach helps prevent potential side effects resulting from extreme temperatures during dialysis sessions.

How Amphenol sensors meet dialysis applications: Amphenol provides small interchangeable thermistors designed to be assembled into metal housings, enabling the monitoring of fluid temperature during dialysis. 

4. Respiratory care

Within critical care, temperature sensors serve two primary purposes: monitoring ventilator flow tubes and humidifiers.

In ventilator flow tubes, these sensors gauge the temperature of the air. It is crucial for the air delivered to patients to be at the appropriate temperature (98.6 ℉) and humidity level to safeguard their airways from harm and ensure comfort. Inadequate temperature control, whether too cold or too hot, can lead to various issues:

  • Discomfort
  • Dry out the airway
  • Mucosal damage
  • Bleeding

Humidifiers play a vital role in respiratory care by introducing moisture to the air, proving invaluable for patients with respiratory conditions like asthma, COPD, and cystic fibrosis. Similar to the air in a ventilator flow tube, the water used in humidifiers needs to be at the appropriate temperature for the patient to prevent bacteria growth.

How Amphenol sensors meet respiratory care applications: Amphenol Sensors provides glass diode or epoxy-coated chip thermistors for monitoring temperatures in ventilator flow tubes and humidifiers. 

5. Thermometry

The measurement of body temperature, thermometry is the most general way to look at temperature monitoring. It also represents one of the most important metrics in critical patient care. Accurate medical temperature monitoring is essential for assessing the severity of illness, tracking patient progress, and guiding treatment decisions.

How Amphenol sensors meet thermometry applications: Amphenol Sensors’ interchangeable thermistors and infrared (IR) temperature sensors facilitate temperature measurements through various methods such as oral, rectal, tympanic, and auxiliary means. 

6. Laser surgical assemblies

Temperature sensors play a vital role in laser surgical assemblies by enabling precise control over heat energy. Due to the high level of control required during laser surgery procedures, surgeons can ensure that tissue is heated to a specific temperature, thereby minimizing the risk of damage to surrounding tissues or organs.

Additionally, these sensors also serve to safeguard medical personnel from excessive heat exposure by alerting them when temperatures exceed predetermined thresholds. In certain cases, the sensors can even automatically deactivate devices in response to dangerous levels of heat.

How Amphenol sensors meet laser surgical assembly applications: Amphenol Sensors offers miniature chip-in-glass or sleeved chip thermistors equipped with fine-diameter wires. These sensors can be inserted into hypodermic needles for myocardial surgeries or externally attached to metal lumens used during laser surgery. 

Custom temperature sensor integration design considerations

Determining the most suitable temperature sensor for an OEM medical device involves careful consideration. Whether opting for a custom-designed or off-the-shelf sensor, specific factors must be addressed in collaboration with the sensor manufacturer:

  • Application Temperature Range: Assessing the operational temperature limits of the device containing the sensor is essential. It is crucial to determine the minimum and maximum temperatures that the sensor will be required to measure.
  • Temperature Accuracy: The desired level of accuracy for the sensor across the temperature range varies depending on the unique specifications of each device or application. Consider this accuracy requirement as the sensor’s tolerance level.
  • Temperature Consistency: Understanding whether the monitored temperature will undergo frequent fluctuations or remain relatively stable is vital for sensor selection.
  • Sensor Lifespan: Evaluating whether the sensor is disposable or reusable is important. In the case of reusability, considerations such as cleaning procedures and expected longevity need to be accounted for.
  • Packaging: Careful consideration must be given to the integration of the sensor into the application. This involves determining the sensor’s housing requirements, such as its ability to withstand specific conditions, as well as factors like size, shape, and weight.
  • Environment: The environmental conditions that the sensor will encounter during its use, such as exposure to air, fluids, or chemicals, should be taken into account.

Custom medical temperature sensors for top-tier patient care

In the ever-evolving field of medicine, catering to individual patient needs and ensuring precise monitoring are constant priorities.

With a growing emphasis on personalized medical treatments, tailored monitoring solutions are essential, particularly in critical care scenarios.

By incorporating custom temperature sensors into medical equipment, healthcare providers can significantly enhance their ability to deliver personalized and precise treatments, ultimately bolstering patient safety and well-being.

About Amphenol Advanced Sensors

Amphenol Advanced Sensors, with its portfolio of industry-leading brands - Thermometrics, NovaSensor, Telaire, Protimeter and Kaye - is an innovator in advanced sensing technologies and innovative embedded measurement solutions customized for regulatory and applications, value by providing critical information for real-time decisions.

We offer domain expertise, rapid customization, world-class manufacturing capability and lasting customer relationships deliver the greatest value in cost of ownership to their customers.

Amphenol Advanced Sensors is a member of the USA-based Amphenol Corporation. With our own global presence we offer our customers exceptional technical support and service in the areas of development, production and distribution.


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Last updated: Jul 7, 2023 at 6:56 AM

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