How would you ventilate a patient using bvm?

To ventilate a patient using a Bag-Valve-Mask (BVM), first ensure that the patient is in a proper position, typically supine, and open the airway by using the head-tilt, chin-lift maneuver or jaw-thrust if spinal injury is suspected. Place the mask over the patient's nose and mouth, creating a tight seal, and squeeze the bag to deliver breaths, aiming for one breath every 5-6 seconds for adults or every 3-5 seconds for infants. Watch for chest rise to confirm effective ventilation, and if necessary, adjust the mask or reposition the airway to maintain a good seal. It’s important to monitor the patient's oxygenation and response throughout the process.