
    Write a function that calculates the total boundary length of a patient's vital sign monitoring zone, where the zone is a square area around the hospital bed, given the distance from the bed's center to the zone's edge in centimeters. The calculated boundary represents the perimeter where wearable device signals must maintain connectivity for continuous health monitoring.
    

    
def square_perimeter(a):
    """
    Write a function that calculates the total boundary length of a patient's vital sign monitoring zone, where the zone is a square area around the hospital bed, given the distance from the bed's center to the zone's edge in centimeters. The calculated boundary represents the perimeter where wearable device signals must maintain connectivity for continuous health monitoring.
    

    """
def square_perimeter(a):
    """
    Write a function that calculates the total boundary length of a patient's vital sign monitoring zone, where the zone is a square area around the hospital bed, given the distance from the bed's center to the zone's edge in centimeters. The calculated boundary represents the perimeter where wearable device signals must maintain connectivity for continuous health monitoring.
    

    """
    perimeter = 4 * a
    return perimeter