What is cricoid pressure?during CPR

Cricoid pressure refers to a small amount of manual
pressure applied to the cricoid cartilage of the trachea during CPR. It is a technique
used by rescuers which tries to  maintain a patent airway during cardiopulmonary
resuscitation. During CPR sometimes the trachea is not open sufficiently to ventilate
the patient. Resistance may be felt by the person using the ambu bag or pressure is felt
by the person giving breathes via a face shield/mask.  Repositioning of the airway is
important to maintain an effective delivery of oxygen to the victim. A head tilt, chin
lift method can also be employed to reposition the airway ( if no cervical or head
trauma exists). If trauma is present, a jaw thrust maneuver can be used in place of the
head tilt, chin lift.