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2026-08-30•~3 min read897439sensormuscle relaxationneuromuscular conductionanesthesiamonitoring

Neuromuscular conduction sensor 897439: muscle relaxation monitoring during anesthesia

Muscle relaxation sensor 897439 for neuromuscular conduction monitoring during anesthesia. How it works, compatibility with monitors, replacement and purchasing for Russia.

Neuromuscular conduction sensor 897439: muscle relaxation monitoring during anesthesia

The use of muscle relaxants is an integral part of modern general anesthesia, especially in abdominal and thoracic surgery. However, working with muscle relaxants requires control: too deep a block hinders awakening, while residual blockade after surgery is dangerous for the patient's breathing.

Neuromuscular conduction monitoring allows the anesthesiologist to assess the depth of the block objectively and to make decisions in good time. The key link in this system is the sensor with which the monitor is equipped. In this guide we examine sensor 897439 from the MediAccessori catalog.

1. What muscle relaxation monitoring is

After the administration of non-depolarizing muscle relaxants, signal transmission from nerve to muscle is blocked. The depth of this block is assessed by stimulating a peripheral nerve (usually the ulnar, facial or tibial nerve) and measuring the muscle response.

Main stimulation modes:

  • •TOF (Train of Four) — the ratio of the 4th response to the 1st (TOF ratio). A value ≥0.9 is considered sufficient recovery.
  • •PTC (post-tetanic count) — for assessing a deep block.
  • •Single twitch and others.

On the basis of these data the anesthesiologist manages the dosing of muscle relaxants and determines readiness for extubation.

2. The role of sensor 897439

PN: 897439

Item 897439 is a sensor for muscle relaxation monitoring. Within the chain:

  1. Stimulation electrodes — on the skin over the nerve.
  2. Sensor 897439 — registers the electromyographic/contractile response of the muscle.
  3. Module and monitor — process the signal and output the readings (TOF and others).

The sensor is a sensitive link: the accuracy of the block depth assessment depends on its condition. A damaged or incompatible sensor produces incorrect readings, which is especially dangerous when working with muscle relaxants.

3. Technical aspects of selection

When selecting sensor 897439, take into account:

  • •The patient monitor model and the presence of a neuromuscular monitoring module.
  • •The connector type and compatibility with the platform.
  • •The design of the attachment/fixation on the patient.

If the nomenclature matches your equipment, the sensor is suitable. If in doubt, send a photo of the connector and the device model to our engineer.

4. Replacement and maintenance

  • •When to replace: unstable signal, no response to stimulation, contact problems, damage.
  • •Hygiene: between operations, clean the sensor according to the manufacturer's instructions and store it in a dry place.
  • •Diagnostics: before replacing, check the electrodes and the module — the cause may not be the sensor.

5. Common mistakes

  • •Selecting without the monitor model. Neuromuscular monitoring modules are tied to the platform.
  • •Using a worn sensor. Incorrect TOF readings are a risk to the patient.
  • •A mistake in the connector type. Different platforms require different pinouts.
  • •Ordering without confirmation. Send the model and a photo before payment.

6. Delivery and purchasing

MediAccessori supplies GE Healthcare sensors and spare parts to Russia and the CIS countries:

  • •The delivery time is confirmed when the order is confirmed.
  • •Rare items: the time is confirmed when the order is confirmed.
  • •Documentation and assistance in selecting by PN.

7. How to order

  1. Write to Telegram @GEpartsV_bot or to email [email protected].
  2. State the monitor model and the PN (897439).
  3. The engineer will confirm compatibility and issue a quotation.
  4. Contract/invoice, prepayment, delivery.

8. Contacts

Sources: MediAccessori catalog (products_current.json, PN 897439); neuromuscular monitoring methods; the experience of service engineers.

Frequently asked questions

What is muscle relaxation monitoring (neuromuscular conduction monitoring) and why is it important?
After muscle relaxants are administered during anesthesia, the depth of the neuromuscular block must be assessed in order to avoid patient movement during surgery and residual blockade afterwards (risk of respiratory insufficiency). Monitoring assesses the muscle response to nerve stimulation (for example TOF — train of four).
What role does sensor 897439 play?
It is the sensor for muscle relaxation monitoring: it registers the electromyographic/contractile response of the muscle to nerve stimulation and transmits the signal to the monitor for assessment of the block depth. It is the sensing link between the patient and the monitoring platform.
How do I check whether 897439 is compatible with my monitor?
Determine the brand/model of the monitor and the interface of the neuromuscular monitoring module. Send the device model and a photo of the connector to our engineer — compatibility is confirmed before purchase.
How often should the muscle relaxation sensor be replaced?
It is a consumable/sensing component: replace it when the signal is unstable, there is no response on the readings, contact is poor or there is visible damage. Careful cleaning and proper storage between operations extend its service life.
What are the delivery times for sensor 897439?
MediAccessori supplies to Russia and the CIS: the delivery time is confirmed when the order is confirmed. When requesting, state the monitor model and the PN.

Need the part number?

Send us the equipment model or the part number and we will check it against the catalogue. You can also search the parts catalogue directly.