Medical device label symbols symbols
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Serial number (SN)Medical device label symbolsSerial number (SN)The number next to SN is the manufacturer's serial number, which identifies this one individual device rather than a whole batch. It lets that specific unit be identified.On ISO 15223-1
Single patient, multiple useMedical device label symbolsSingle patient, multiple useThe device may be used several times, for multiple procedures, but only on the same single patient. It must not be used on another patient.On ISO 15223-1
Single sterile barrier systemMedical device label symbolsSingle sterile barrier systemThe device is packed in a single sterile barrier system, one layer of packaging that keeps it sterile until opened. A double ring means two such layers.On ISO 15223-1
SterileMedical device label symbolsSterileThe medical device has gone through a sterilisation process. Versions with an extra box after the word name the method used, such as EO, R or a thermometer for steam or dry heat.On ISO 15223-1
Sterilized using ethylene oxide (STERILE EO)Medical device label symbolsSterilized using ethylene oxide (STERILE EO)The device was sterilised using ethylene oxide (EO) gas. Like the other STERILE marks it means the contents are sterile as supplied.On ISO 15223-1
Sterilized using irradiation (STERILE R)Medical device label symbolsSterilized using irradiation (STERILE R)The device was sterilised using irradiation, shown by the R in the second box. Like the other STERILE marks it means the contents are sterile as supplied.On ISO 15223-1
Sterilized using steam or dry heatMedical device label symbolsSterilized using steam or dry heatThe device was sterilised using steam or dry heat, shown by the thermometer in the second box. Like the other STERILE marks it means the contents are sterile as supplied.On ISO 15223-1
Unique device identifier (UDI)Medical device label symbolsUnique device identifier (UDI)Marks the carrier that contains the device's unique device identifier (UDI) information, such as the code printed next to it. Read or scan that code to identify the device.On ISO 15223-1
Upper limit of temperatureMedical device label symbolsUpper limit of temperatureThe temperature printed next to the top stroke is the highest temperature the medical device can safely be exposed to. Keep it below this value in storage and transport.On ISO 15223-1
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