Low svo2 - Study guides, Class notes & Summaries

How does COPD result in atrial fibrillation and predisposition to PEs? - COPD causes pulmonary hypertension, right ventricular hypertrophy, and right atrial enlargement. The right atrial enlargement causes stretching of the atrial tissue and frequently results in atrial dysrhythmias. SA blocks, second-degree AV block type I, and third-degree AV heart block at the level of the AV node would occur in _______________ occlusion - RCA (as seen in inferior wall MIs) There is (more/less) risk of b...

2024 CVICU TEST STUDY GUIDE GRADED A+ SVO2 Mixed venous oxygen saturation (SvO2) is the percentage of oxygen bound to hemoglobin in blood returning to the right side of the heart. This refects the amount of oxygen "left over" after the tissues remove what they need. SVO2 Normal >60% Low SVO2 Inadequate oxygen delivery or increased oxygen consumption Ex: fever, pain, bleeding, infection High SVO2 increase in CO, decrease in oxygen demand, reduction in oxygen extraction Ex: anesth...

What is the difference between an anaphylactic and anaphylactoid reaction? - Anaphylactoid reaction is clinically indistinguishable from anaphylactic reaction but does not require previous exposure to the antigen. Anaphylactoid reaction is not IgE mediated, and direct activation and degranulation of mast cells are thought to be triggered by the complement system. Anaphylactic reaction requires previous exposure to the antigen and is IgE mediated What happens to SvO2 if oxygen delivery decre...

(Answered)TMC EXAM A latest distinction exam solutions./ Respiratory therapist TMC Exam A 48 year-old female is admitted to the ED with diaphoresis, jugular venous distension, and 3+ pitting edema in the ankles. These findings are consistent with heart failure A patient is admitted to the ED following a motor vehicle accident. On physical exam, the respiratory therapist discovers that breath sounds are absent in the left chest with a hyperresonant percussion note. The trachea is shifted t...

CCRN Barrons Respiratory Concepts Exam Questions and Answers 100% pass Rely on mild hypoxemia for ventilator drive. if the PaO2 Is corrected to normal, this may result in a decreased drive to breathe - Answer- Chronic PaCO2 retainers What is the clinical indicator of ventilation - Answer- PaCO2 What is minute ventilation - Answer- tidal volume x respiratory rate +normal ventilation is about 4L/min an increase in minute ventilation = - Answer- an increase in work of breathing Primary musc...

FCCN II: cardiac concepts Questions with solutions 2023 preload: what how wet/dry you are amount of fluid filling heart affected by dilating/constricting VEINS R heart -CVP L heart -PCWP (wedge pressure) preload: affected by VEINS constrict --> INCREASE dilate --> DECREASE Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:05 / 0:15 Full screen preload: frank-starling principle giving fluid improves CO up...

A 48 year-old female is admitted to the ED with diaphoresis, jugular venous distension, and 3+ pitting edema in the ankles. These findings are consistent with A. liver failure. B. pulmonary embolism. C. heart failure. D. electrolyte imbalances Correct Answer Heart failure A patient is admitted to the ED following a motor vehicle accident. On physical exam, the respiratory therapist discovers that breath sounds are absent in the left chest with a hyperresonant percussion note. The trac...

Alveolar Oxygen Tension (PAO2)/Alveolar Air Equation correct answer: Shortcut: (Fio2 x 7) -Paco2 +10 VD/VT and ratio correct answer: Paco2-Peco2/Paco2 Make it a ratio by multiply answer by 100. 20-40% (up to 60% for vent pts) Alveolar Minute Ventilation correct answer: (VT-VD) x f Anatomic deadspace correct answer: 1ml per 1lb body weight Work of breathing correct answer: change in Pressure X change in Volume .5-.7 J/L (.05-.07 kg-m/l) Alveolar-Arterial Oxygen Gradient (P(A-a...

A patient develops atrial fibrillation after abdominal surgery. Her blood pressure falls from 110/70 mm Hg to 92/68 mm Hg. The hypotension is related to which of the following? a. Decrease in ventricular contractility b. Hypovolemia c. Mural thrombi d. Decrease in ventricular filling - Correct answer: d Rationale: The contribution that atrial contraction makes to ventricular filling volume is approximately 15% to 30%. Atrial fibrillation results in quivering but not contracting atria. The...

How do you diagnose airway obstruction? - Correct answer-FEV1/FVC <70% Once airway obstruction is diagnosed, how do you determine whether it is d/t asthma or COPD? - Correct answer-Give pt bronchodilator. if >12% improvement of FEV1 then asthma The *Global* initiate for Chronic *Obstructive Lung Disease* (GOLD) categorizes airflow limitation into how many stages? - Correct answer-4 stages of COPD GOLD 1 spirometric findings - Correct answer-mild: FEV1/FVC = <70% FEV1 >80% pre...