Apple is removing a blood oxygen sensor from two of its watch models to avoid a US ban.

 The move is expected to prevent further sales interruptions and may prompt inquiries about Apple's expansion into the health sector.

Apple's sales of certain watch models were temporarily suspended due to a U.S. import ban following a ruling by the U.S. International Trade Commission in October.

 The ITC found Apple to have infringed upon Masimo's patents related to the blood-oxygen tool in medical technology.

The U.S. Customs and Border Protection agency approved technical modifications to the watches, which involve the removal of the blood-oxygen sensor.

Apple's e-commerce operations in the U.S. were suspended prior to the Christmas season due to the ITC ruling.

Apple announced that both the Series 9 and Ultra 2 watch models were made available for purchase on their online store on December 28.

Apple plans to remove blood-oxygen feature from smartwatches to bypass US ban if appeal fails, citing Masimo's patent feud with the iPhone maker over technology patents.