Devices descending from K131021

3 later devices reach Pulse Oximeter through their predicates, nearest generation first.

Generation	Number	Device	Applicant	Decided	Own descendants	Recalls
+1	K191403	Pulse Oximeter	Nonin Medical, Inc.	2019	1	—
+1	K140785	Pulse Oximeter	Nonin Medical, Inc.	2014	0	—
+2	K202743	Med-Link Temp-pulse Oximeter	Shenzhen Med-Link Electronics Tech Co., Ltd.	2021	0	—