
    In a hospital's patient monitoring system, identify the patient ID from a list of patient records where each record contains a patient ID and their calculated readmission risk score, returning the ID of the patient with the lowest risk score. The system needs to efficiently process these paired records to help medical staff prioritize care resources.
    

    
from operator import itemgetter

def index_minimum(test_list):
    """
    In a hospital's patient monitoring system, identify the patient ID from a list of patient records where each record contains a patient ID and their calculated readmission risk score, returning the ID of the patient with the lowest risk score. The system needs to efficiently process these paired records to help medical staff prioritize care resources.
    

    """
from operator import itemgetter

def index_minimum(test_list):
    """
    In a hospital's patient monitoring system, identify the patient ID from a list of patient records where each record contains a patient ID and their calculated readmission risk score, returning the ID of the patient with the lowest risk score. The system needs to efficiently process these paired records to help medical staff prioritize care resources.
    

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