The tissue oxygen saturation monitor is a medical device that uses optical technology to evaluate the hemoglobin oxygenation status in tissues, and is widely used in critical care, surgical anesthesia, wound repair, and other fields. Its use needs to be combined with equipment characteristics, patient status, and operating standards. The following provides a detailed description from the aspects of preparation before use, operating procedures, data interpretation, and maintenance points:

1、 Preparation before use

1. Equipment inspection and calibration

-After turning on, check if the host screen displays normally and if the sensor is securely connected to the host.

-Regularly calibrate according to the manufacturer's recommendations (such as once a year), use professional tools to adjust optical parameters, and ensure measurement accuracy.

-Check the battery level or power connection to avoid monitoring interruptions caused by power outages.

2. Patient preparation and sensor placement

-Choose suitable monitoring sites (such as forehead, neck, proximal limbs), avoiding areas with scars, pigmentation, or vascular lesions.

-Clean the surface oil and dirt of the skin, keep it dry, and prevent signal attenuation.

-Place the sensor probe tightly against the skin and secure it according to the device requirements (such as using tape or bandages) to avoid looseness or detachment.

2、 Operation process and parameter settings

1. Start monitoring and mode selection

-After booting up, enter the monitoring interface and select the continuous monitoring or intermittent monitoring mode according to your needs.

-Set alarm thresholds (such as triggering alarms when tissue oxygen saturation is below the set value) to facilitate timely detection of abnormalities.

2. Avoid interfering factors

-Inform the patient to remain still and avoid muscle tremors or frequent changes in position to avoid affecting the stability of optical signals.

-Turn off nearby mobile phones, Wi Fi devices, or other electromagnetic interference sources to prevent signal noise interference.

-Avoid direct exposure of strong light to the monitoring area to avoid affecting the emission and reception of the light source.

3. Dynamic adjustment and recording

-Regularly observe and monitor data trends, record baseline values, change time points, and corresponding clinical events (such as medication and oxygen inhalation).

-If there is a sudden drop or fluctuation in the value, check the sensor position, the patient's peripheral circulation status (such as limb coldness), or the device connection.

3、 Data interpretation and clinical application

1. Meaning of core parameters

-Tissue oxygen saturation (StO2): reflects the oxygenation ratio of hemoglobin in local tissues, with a normal range of 70% -90%. If it is lower than 60%, it indicates tissue hypoxia.

-Velocity resolved perfusion (provided by some devices): Distinguish the red blood cell perfusion volume at different blood flow velocities to assist in determining the type of microcirculation disorder.

-RBC tissue proportion: reflects the proportion of red blood cells in the tissue, indirectly evaluating blood perfusion and tissue metabolic needs.

2. Clinical application scenarios

-Shock resuscitation: Monitoring tissue oxygen saturation can determine whether peripheral perfusion has improved and guide fluid replacement or the use of vasoactive drugs.

-Surgical anesthesia: Real time monitoring of tissue oxygen levels in organs such as the brain and intestines to prevent postoperative complications.

-Wound management: Evaluate local blood circulation through oxygen saturation and optimize the wound healing environment.

4、 Daily maintenance and upkeep

1. Sensor maintenance

-After each use, wipe the surface of the probe with a cotton cloth. Stubborn stains can be cleaned with a small amount of medical alcohol to prevent liquid from seeping into the interior.

-When stored, avoid light and moisture, and place it separately in a dedicated box to prevent mechanical damage.

2. Maintenance of the host and cables

-Regularly clean the host casing and use compressed air to remove dust from gaps; Check if the cable is damaged and follow the principle of minimum radius when bending.

-Every quarter, professional personnel inspect the internal circuits, battery performance, and stability of optical components.

3. Long term suspension management

-Remove the power and cool to room temperature, and store the sensor separately from the host.

-Record downtime and maintenance logs, and recalibrate before reactivation.

5、 Precautions and Risk Prevention

1. Patient cooperation and safety

-Inform patients and their families not to randomly remove the sensor to avoid skin damage or data interruption caused by pulling.

-For agitated patients, sensors should be fixed and monitoring should be strengthened to prevent misoperation.

2. Handling of abnormal situations

-If the monitoring value remains abnormal (such as StO2<50%), immediately check the equipment function and evaluate the patient's vital signs to rule out equipment failure or clinical critical events.

-When adverse reactions such as skin redness, swelling, and pressure sores are detected, the monitoring site should be replaced and corresponding nursing measures should be taken.