Practice Test 1 CCRN (Pass CCRN). All Questions with 100% Accurate answers. Rated A+

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What is vasogenic cerebral edema? - ☑☑Vasogenic cerebral edema is an increase in extracellular fluid caused by a breakdown of the blood-brain barrier with the resultant increase in vascular permea... bility. This cerebral edema begins locally and becomes more generalized. Common causes are trauma (including surgical trauma), tumors, hemorrhage, and abscesses What ventilator parameter indicates fluid volume excess? - ☑☑An A:a gradient greater than 10 mm Hg is a reflection of a diffusion defect. Note that the process of diffusion is between A (alveolus) and (a) arterial blood. An increase in intraalveolar fluid dilutes and inactivates surfactant, causing alveolar collapse (decreasing vital capacity) and decreases lung compliance. Peak inspiratory pressure increases reflect a decrease in lung compliance What does autonomy refer to? - ☑☑The patient's right to make decisions for themselves What does beneficence mean? - ☑☑Obligation to do good What does nonmaleficence mean? - ☑☑Obligation to do no harm What does fidelity mean? - ☑☑the obligation to abide by agreements and responsibilities What does veracity mean? - ☑☑The obligation to tell the truth What are Diagnosis-Related groups? - ☑☑DRGs constitute a prospective payment program for Medicare patients. Payment is based on primary and secondary diagnosis, primary and secondary procedures, age, and length of hospitalization BNP is secreted in response to? - ☑☑Ventricular wall stretch What are omnious signs in a patient with status asthmaticus? - ☑☑A normalization or increase in the PaCO2. This patient is still tachypneic, and if ventilation is normal, PaCO2 should be decreased. The other ominous sign in this patient would be absence of wheezing or rhonchi, because they would indicate that ventilation is insufficient to cause these noises. What problems arise from losses from the GI tract? - ☑☑Any loss results in hypokalemia. Vomiting results in loss of acidic contents, whereas losses below the pylorus result is alkalitic losses leading to metabolic acidosis. Fluid is sequestered in the intestine leading to hypovolemia, which could cause hypovolemic shock. Actual problems are worse than potential problems!! - ☑☑ How can you differentiate the cause of jaundice? - ☑☑An increase in direct bilirubin is associated with biliary obstruction because direct bilirubin is conjugated. An increase in indirect bilirubin is associated with hepatic disease or excessive hemolysis because indirect bilirubin is unconjugated What antihypertensive meds work best in African american patients? - ☑☑African-Americans do not respond well to angiotensin-converting enzyme inhibitors (e.g., captopril [Capoten]), but they do respond well to an angiotensin II blocker (valsartan [Diovan]). Of the beta-blockers, labetalol works best. Of the calcium channel blockers, diltiazem works best What lab values define acute respiratory failure? - ☑☑50-50! PaO2<50 and/or PaCO2>50 Hyperkalemia can cause what? - ☑☑Diarrhea-increases gastric motility Flaccid paralysis- partially depolarizes muscle cells, prevents further depolarization Every 1 inch increase in abdominal girth equates to how much blood accumulation in the abdomen - ☑☑500-1000mL What pacing method would be used in a patient in atrial fib? - ☑☑VVI- you don't want to sense or pace the atria. 1st letter-paced chamber 2nd letter-chamber sensed 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 Mitral stenosis is associated with what? - ☑☑Pinkish discoloration of the cheeks. It is a diastolic murmur What murmur is associated with widened pulse pressure? - ☑☑Aortic regurg What murmur is associated with narrowed pulse pressure? - ☑☑Mitral regurg What lead changes are associated with left ventricle hyperthrophy? - ☑☑Strain pattern in V5 and V6 (asymmetric T wave inversion) When the depth of the S wave in lead V1 or V2 plus the height of the R wave in lead V5 or V6 is 35 mm or greater, this constitutes voltage What lead changes are associated with right ventricle hypertrophy? - ☑☑strain pattern in V1 and V2. Prominent R wave in V1 reverse progression of the R wave across the precordium. What organ system is the most common to fail in severe sepsis? - ☑☑Hematologic- coagulopathies are common in severe sepsis What are the early signs of hypoglycemia? - ☑☑The early signs of hypoglycemia are mediated by the sympathetic nervous system, which acts to mobilize glucose stores (tachycardia, tachypnea, diaphoresis). Later signs of hypoglycemia are related to low glucose levels in the brain (neuroglycopenia) **Early signs can be masked in pts taking beta-blockers What is the systolic BP at different locations if you are able to palpate a pulse? - ☑☑If the radial artery can be palpated, the systolic BP is at least 80 mm Hg. If the brachial artery can be palpated, the systolic BP is at least 70 mm Hg. If only the carotid artery can be palpated, the systolic BP is approximately 60 mm Hg What happens to SvO2 if oxygen delivery decreases for any reason - ☑☑SvO2 is a reflection of oxygen reserve. If oxygen delivery is decreased, oxygen consumption continues, and oxygen reserve decreases. SvO2 decreases any time the delivery of oxygen decreases or the consumption of the tissues increases A simple way to estimate CVP is to add 5 cm to the measured height that the jugular veins are distended above the sternal angle (angle of Louis) with the patient in a 45-degree angle - ☑☑ What is the most common cause of right ventricular failure? - ☑☑Left ventricular failure- causes pulmonary congestion and pulmonary HTN which increases the workload for the right side of the heart Other causes- primary pulmonary hypertension, RV infarction, pulmonic stenosis, PE, mitral stenosis What findings would be consistent with a massive hemothorax? - ☑☑Fluid, such as blood, will be dull to flat to percussion. The blood in the pleural space compresses normal lung tissue and causes diminished to absent breath sounds. A large volume of blood in the pleural space may cause the trachea to shift away from the affected side toward the unaffected side How does positive pressure ventilation affect ICP - ☑☑It increases intrathoracic pressure, which leads to increased ICP What is the difference between active and passive euthanasia? - ☑☑Passive euthanasia is allowing a person to die without taking lifesaving measures. Hydration and nutrition is usually maintained. Active euthanasia is doing something that causes death To minimize respiratory fluctuations on PAOP, you measure it - ☑☑At the end of expiration Patient breathing-peak Ventilator-valley Lateral wall MI - ☑☑Changes in V5, V6 and/or I and avL Anterior wall MI - ☑☑V2, V3, V4 Inferior wall MI - ☑☑II, III, and aVF Bleeding time is a reflection of what? - ☑☑Platelet function. Clopidogrel and abciximab are specifically platelet aggregation inhibitors. Heparin is an indirect thrombin inhibitor, but it also inhibits platelet aggregation What is the earliest sign of hepatic failure in MODS? - ☑☑Hypoglycemia- liver helps form and breakdown glycogen. Ascites, increased serum bilirubin and increased ammonia levels take time to develop Dobutamine is the drug of choice for cardiogenic shock - ☑☑Beta-adrenergic stimulant, increases HR and contractility What EKG changes occur with LBBB? - ☑☑QRS complex greater than 0.12 second in duration and a QRS complex that is positive in leads V5 and V6 (consider these left ventricular leads) and negative in leads V1 and V2 (right ventricle leads) RBBB- QRS upright in V1 V2, negative in V5 V6 SaO2 has the least impact on oxygen delivery. Hemoglobin and cardiac index are more important - ☑☑ Weakness, fatigue, muscle pain, and abdominal discomfort in a patient taking Metformin may indicate what? - ☑☑Lactic acidosis and rhadomyolysis How does Nifedipine (Procardia) work? - ☑☑Nifedipine decreases myocardial oxygen consumption by dilating veins and arteries, thereby decreasing preload and afterload. Nifedipine also decreases vasospasm and potential for vasospasm. Unlike diltiazem and verapamil, nifedipine does not significantly decrease contractility What are the components of the pulmonary artery waveform? - ☑☑In a pulmonary artery waveform the three components of the waveform are systole, dicrotic notch, and diastole. Systole is the pressure generated by the right ventricle so that the pulmonic valve will be pushed open, the dicrotic notch is caused by the closure of the pulmonic valve, and diastole is the pressure in the pulmonary artery during ventricular diastole. The diastolic pressure is a reflection of the vascular tone in the pulmonary vascular bed. If the vessels are constricted or if there is back pressure from the left side of the heart, the diastolic pressure will be high What is ankle-brachial index? - ☑☑ABI is ankle-brachial index, or ankle artery pressure divided by brachial artery pressure. The pressure at the ankle normally is higher than the pressure at the brachial artery, and the normal ABI is 1 or greater. This measurement is more quantitative than the presence or absence of audible Doppler pulses. If an occlusion is developing, the ankle artery pressure (measured with a blood pressure cuff and a Doppler stethoscope) will decrease and the calculated ABI will decrease long before the pulses are no longer audible How does hypoxemia affect pulmonary vascular pressures? - ☑☑It causes the vasculature to [Show More]

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