
    Write a function that takes a list of patient monitoring records (where each record contains a patient ID and their vital sign measurement) and returns the ID of the patient with the lowest vital sign reading. The function should help medical staff quickly identify patients who might need immediate attention due to concerningly low measurements.
    

    
from operator import itemgetter

def index_minimum(test_list):
    """
    Write a function that takes a list of patient monitoring records (where each record contains a patient ID and their vital sign measurement) and returns the ID of the patient with the lowest vital sign reading. The function should help medical staff quickly identify patients who might need immediate attention due to concerningly low measurements.
    

    """
from operator import itemgetter

def index_minimum(test_list):
    """
    Write a function that takes a list of patient monitoring records (where each record contains a patient ID and their vital sign measurement) and returns the ID of the patient with the lowest vital sign reading. The function should help medical staff quickly identify patients who might need immediate attention due to concerningly low measurements.
    

    """
    res = min(test_list, key=itemgetter(1))[0]
    return res