Anesthesia Monitors Overview

There are medical procedures that can’t be done well without anesthesia. It’s the anesthesia that provides pain control during surgery or procedure. While it’s generally considered safe with rare cases of untoward reaction, anesthesia can cause unpleasant effects, depending on the type of anesthesia administered to the patient.

The common side effects of general anesthesia include nausea and vomiting, muscle ache, sore throat, chills, itching, and confusion. General anesthesia can also cause cognitive dysfunction like delirium and malignant hyperthermia.

Patients receiving regional anesthesia may suffer from headache, difficulty urinating, back pain, hematoma, pneumothorax, and nerve damage (very rare). Side effects of local anesthesia are rare and if they do occur, they are usually caused by the way local anesthesia is administered.

Anesthesia affects the central nervous system and other vital systems of the body like cardiovascular and respiratory systems. Hence, patients receiving anesthesia are continually monitored before, during, and after anesthesia administration to ensure patient safety.

According to the standard set by the American Society for Anesthesiologists, the following should be continually assessed on all anesthetics: oxygenation, ventilation, circulation, and body temperature. The anesthesia team should ensure that the patient has adequate oxygenation and ventilation, good blood circulation, and maintains appropriate body temperature during all anesthetics.

In evaluating vital signs and other monitoring parameters, different instruments are used. These include an inflatable blood pressure cuff which is constantly attached to the patient’s arm, pulse oximeter to measure the patient’s oxygen saturation, electrocardiogram for monitoring the heart activity, temperature probe, and oxygen and carbon dioxide analyzer. There are also devices called anesthesia monitors that play a vital role in ensuring patient safety all throughout the anesthetic period.


Anesthesia Monitors: What They Do

Anesthesia monitors are simply devices used to monitor the delivery of anesthetic substances and the physiologic response of the patient. An anesthesia monitor can be a separate console or part of an anesthesia machine.

BIS Monitor

An example of an anesthesia monitor is a bispectral index (BIS) monitor. It’s a device used for monitoring the patient’s depth of anesthesia during and after surgery. The monitor calculates the bispectral index which results from the analysis of the patient’s electroencephalogram (EEG).

The monitor is highly useful for the anesthesiology team specially for the anesthesiologist. It helps control the patient’s depth of anesthesia, reducing possibility of intraoperative awareness. BIS monitor isn’t just used in the operating room but as well in the intensive care units and outpatient surgical facilities.

Vital Signs Patient Monitor

When anesthesia is given to a patient, the respiration, cardiovascular status, and body temperature are affected. This is the reason why vital signs are part of the monitoring parameters.

While these vital signs can be assessed manually, vital signs patient monitor makes it easier to evaluate the patient’s status. Most of these monitors provide fast and accurate results.

Capnography Monitor

Another example of an anesthesia monitor is a capnography monitor. This monitor evaluates the concentration of carbon dioxide in the patient’s breath.

Having a capnography monitor enables the medical team to detect possible respiratory distress. This is because when a patient stops breathing, the carbon dioxide drops, setting an alarm to alert the medical team.


Tips for Buying Anesthesia Monitors

Whether you’re buying brand new or used anesthesia monitors, it’s important to look into the seller’s credibility, product quality and warranty, and price.

Seller’s Credibility

It’s best to buy an anesthesia monitor from a reputable medical equipment dealer. These monitors aren’t cheap so be wary of sellers who are saying that they sell very cheap monitors. Look for referrals or read seller reviews before you buy.

Product Quality and Warranty

If the product is used, then you may want to look into its quality. Also, make sure that it comes with product warranty in case of unseen damages or defects.


Anesthesia monitors are available at varied prices. There are monitors that are over $5,000 while there are also those that are below $3,000. So choose one that suits your budget and need.

Absolute Medical offers high quality anesthesia monitors. Their used monitors have been evaluated thoroughly to provide buyers with substantial savings for high quality products.  

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