Download Respiratory Therapy CRT Exam 2024 Questions and Answers and more Exams Nursing in PDF only on Docsity! Respiratory Therapy CRT Exam questions and answers 2024 What is changed when a pat is on PV? Correct Answer is Change the set pressure increased or decreased to adjust Vt What equation is used to reduce PaCo2 on a pat vented with VC ventilation when the rate is needing to be changed due to volume being high enough? Correct Answer is Desired F= known F X PaCo2/desired PaCo2 What is the equation to find desired Vt in VC ventilation? Correct Answer is Desired Vt= known Paco2 X Known Vt/desired PaCo2 What is increased to increase Vt with a PVC time cycled ventilation? Correct Answer is With pressure control ventilation PCV the set pressure is generally increased to obtain the targeted Vt. PCV is Time cycled If It is short increasing it will increase volume delivery without increasing pressure. What do you change if Vt and pressure plateu are already high to improve PaCo2? Correct Answer is frequancy What will need to be changed on a ventilated pat on VC and PV to decrease the PaCo2? Correct Answer is minute volume Ve What are the causes of respiratory acidosis in a nonventilated patient? Correct Answer is pulmonary edema pneumonia asthma chest wall abnormalities neuromuscular disorders central nervous system problems What two values are effected if patient has respiratory acidosis and Va is not adequante on volume ventilation and pressure ventilation? Correct Answer is PaCo2 elevated above >45mmhg and pH decreased <7.35 What two things can be adusted when a patient is on PCV with respiratory acidosis? Correct Answer is Inspiratory time set pressure reaches alveolar level if this doesnt work set pressure increased to improve volume What change in ventilation is made to ventilator to correct respiratory alkalosis or acidosis? Correct Answer is Vt or rate What change is made right away when a patient is on mechanical ventilatio? Correct Answer is minute volume Ve What should a therapist do if the heart rate increased during suctioning? Correct Answer is immediately stop suctioning and provide 100% O2 For above the cuff suctioning, what pressure is left on to continuously suction? Correct Answer is 20mmHg What is the correct size of catheter used to suction? Correct Answer is 1/2 the size of the ET tube. equation for a size 8 ET tube 3x8=24 24/2=12Fr Size 12Fr is used A patient with CHF has what type of secretions? Correct Answer is Thin white or pink frothy secreations but won't block the airway What is the normal ratio of Vd to Vt (Vd/Vt)? Correct Answer is 0.2 to 0.4 Where does the contraction start of the ventricle? Correct Answer is Starts at Q What is pip? Correct Answer is Peak inspiratory pressure, this is the peak at which the flow is given at an inspiration What is SpO2?` Correct Answer is Saturation of O2 on the Hb What is an HME? Correct Answer is artificial nose humidity, filter,warms What is slope (aka rise)? Correct Answer is Inspiratory rise time, it slows or speeds the rate at which pressure and flow exit the ventilator for a specific period of time What is trigger? Correct Answer is The sensativity set too low can also cause auto peep What is FIO2? Correct Answer is % of O2 to improve Oxygenation. A way to measure O2 to the tissues. Check ABG's to keep PaO2 ath 60-90mmHg below 0.4 to 0.5 What is minimal occluding volume? Correct Answer is volume of air measured to seal the cuff at 1 to 2%
