Skip to main content




An oximeter is a machine that measures the amount of oxygen in your child's blood. This number tells the staff if your child is getting enough oxygen to her cells. The amount of oxygen needed varies with each child.

A probe with a light measures the oxygen level. This probe is usually placed on a finger or toe, which is connected to the machine. The St. Jude staff will use one (1) of 2 types of probes — one is clipped to your child and the other taped. The staff will use the probe that is most comfortable for your child. The nurse will move the probe several times.

Alarms may sound when the probe comes off your child's finger, if your child moves her finger a lot, or if your child's fingers or toes are cold. The alarm also sounds when your child is not receiving enough oxygen. The staff may give your child more oxygen at those times.

To learn more about the oximeter, talk to your child’s doctor or nurse.



This document is not intended to take the place of the care and attention of your personal physician or other professional medical services. Our aim is to promote active participation in your care and treatment by providing information and education. Questions about individual health concerns or specific treatment options should be discussed with your physician.

St. Jude complies with health care-related federal civil rights laws and does not discriminate on the basis of race, color, national origin, age, disability, or sex.

ATTENTION: If you speak another language, assistance services, free of charge, are available to you. Call 1-866-278-5833 (TTY: 1-901-595-1040).

ATENCIÓN: si habla español, tiene a su disposición servicios gratuitos de asistencia lingüística. Llame al 1-866-278-5833 (TTY: 1-901-595-1040).

تنبيه: إذا كنت تتحدث باللغة العربية فيمكنك الاستعانة بخدمات المساعدة اللغوية المتوفرة لك مجانا. .يرجى الاتصال بالرقم. 5833-278-866-1  (الهاتف النصي: 1040-595-901-1).