Low svo2 - Study guides, Class notes & Summaries

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...

CCRN Review (2022/2023) Already Graded A Heart rate (HR) 60-100 beats/min Mean arterial pressure (MAP) 70-105 mmHg Cardiac output (CO) 4-5 L/min Cardiac index (CI) 2.5-4.5 L/min/m2 Stroke volume (SV) 50-100 ml/beat Stroke index (SI) 35-60 ml/m2/beat Right arterial pressure (RAP) 4-8 mmHg Pulmonary artery pressure (PAP) Systolic 15-30 mmHg Diastolic 5-15 mmHg Pulmonary artery occlusive pressure (PAOP) 8-12 mmHg Systemic vascular resistance (SVR) 800-1200 dynes/sec/cm-5 Systemic vascula...

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...

(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...

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...

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 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...

What value reflects right ventricular preload? - CVP or RA pressure In hypovolemic shock, does SVR increase or decrease? - increase CVP and PAOP are a measure of preload or after load? - preload Heart rate x stroke volume =? - cardiac output Stroke volume is dependent on what three concepts? - preload, contractility, and after load PAOP is a measure of which ventricle? - left SVR measures which ventricle? - left PVR measures which ventricle? - right PVR and SVR are a measure of preload o...

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...