WorksheetsIntroduction to Shock and Oxygen Delivery
Total questions: 78
Worksheet time: 39mins
Which statement best defines shock as introduced in this section?
A state of elevated blood pressure
A disease process associated with inadequate tissue perfusion leading to poor oxygen delivery
A condition of excess oxygen in tissues
A normal response to exercise
In clinical assessment, inadequate tissue perfusion is often evaluated under which concept?
Hypertension
Homeostasis
Shock
Hyperoxia
Which list includes three typical categories of shock noted in the introduction?
Cardiogenic, Septic, Hypovolemic
Allergic, Neurogenic, Traumatic
Respiratory, Renal, Hepatic
Ischemic, Toxic, Autoimmune
Match each type of shock with its causative pathophysiologic mechanism category label as presented.
Cardiogenic shock
Pump failure of the heart
Distributive shock
Peripheral vasodilation/maldistribution
Obstructive shock
Physical blockage to circulation
Hypovolemic shock
Reduced intravascular volume
According to the categorization by causative pathophysiologic mechanism, which of the following is NOT listed?
Cardiogenic shock
Metabolic shock
Hypoxic shock
Neurogenic shock
Which set correctly lists all the shock categories mentioned on the Types of Shock slide?
Cardiogenic, Distributive, Hypoxic, Metabolic, Obstructive, Hypovolemic
Septic, Anaphylactic, Neurogenic, Cardiogenic
Hemorrhagic, Traumatic, Toxic, Hypoxic
Cardiogenic, Respiratory, Endocrine, Obstructive
Oxygen delivery represents which of the following?
The partial pressure of oxygen in venous blood
The amount or volume of oxygen transported to the tissues each minute
The saturation of hemoglobin in the lungs
The total body oxygen consumption per day
Cardiac output is defined as the product of which two variables?
Stroke volume and vascular resistance
Heart rate and blood pressure
Stroke volume and heart rate
End-diastolic volume and ejection fraction
Oxygen content refers to what, according to the Oxygen Delivery slide?
Amount of oxygen in venous blood
Amount of oxygen dissolved in plasma only
Amount of oxygen in arterial blood
Total body oxygen stores
Which component directly contributes to oxygen delivery by determining flow of blood to tissues?
Oxygen consumption
Cardiac output
Venous return pressure
Baroreflex sensitivity
A patient with reduced stroke volume would most directly have a decrease in which parameter listed?
Oxygen content
Cardiac output
Arterial oxygen partial pressure
Tissue oxygen extraction
Which combination best links the concept to its brief description?
Shock
Often the clinical manifestation assessed when oxygen delivery is poor
Inadequate tissue perfusion
Leads to poor oxygen delivery to tissues
Cardiac output
Product of stroke volume and heart rate
Oxygen content
Amount of oxygen in arterial blood
Which statement best defines cardiogenic shock as presented in the material?
Failure of forward flow leading to inadequate tissue perfusion despite adequate intravascular volume
Loss of vessel tone due to vasodilatory mediators
Reduced oxygen content in arterial blood
Inadequate nutrients for cellular energy production
Which factor is NOT listed as a contributor to cardiogenic shock?
Ineffective forward blood flow
Structural problems
Systolic and diastolic dysfunction
Loss of vessel tone from sympathetic failure
Select the primary mechanism underlying distributive shock.
Excessive intravascular volume
Loss of vessel tone
Obstructed venous return
Myocardial infarction with pump failure
Which pair correctly matches a state that can lead to distributive shock?
Sepsis
Pulmonary embolism
Myocardial rupture
Hypoglycemia
Two mechanisms contribute to loss of vessel tone in distributive shock. Which option lists them both?
Decreased sympathetic control and presence of vasodilatory mediators
Hypoxemia and hypercapnia
Intravascular fluid loss and hemorrhage
Valve stenosis and regurgitation
According to the described neurogenic response in distributive shock, which sequence of changes is correct?
Increased preload → increased stroke volume → increased cardiac output → increased DO2
Decreased preload → decreased stroke volume → decreased cardiac output → decreased DO2
Increased afterload → decreased cardiac output → increased DO2
Decreased heart rate → increased preload → increased DO2
Hypoxic shock is best characterized by which condition?
Reduction in oxygen content in arterial blood
Inability of mitochondria to utilize oxygen
Massive fluid losses from vasculature
Autoimmune destruction of cardiac tissue
Metabolic shock occurs under which circumstance?
When there is a reduction in oxygen content in arterial blood
When there are inadequate nutrients for cellular energy production or poor utilization of delivered oxygen and nutrients
When sympathetic control of vasomotor tone increases
When structural cardiac defects obstruct ejection
Match each shock type with the key phrase from the material.
Cardiogenic shock
Forward flow failure despite adequate intravascular volume
Distributive shock
Loss of vessel tone
Hypoxic shock
Reduced oxygen content in arterial blood
Metabolic shock
Inadequate nutrients or poor utilization of oxygen/nutrients
Which example best fits the list of conditions that can lead to distributive shock?
Sepsis
Cardiac tamponade
Massive hemorrhage
Tension pneumothorax
Which change is NOT part of the end result described for the neurogenic response in distributive shock?
Decreased preload
Decreased stroke volume
Decreased cardiac output
Increased DO2
Which set correctly identifies the three listed contributors to cardiogenic shock?
Ineffective forward blood flow; structural problems; systolic and diastolic dysfunction
Loss of sympathetic tone; vasodilatory mediators; neurogenic state
Reduced arterial oxygen; inadequate nutrients; poor oxygen utilization
External compression; hemorrhage; dehydration
Which statement best defines obstructive shock based on the material?
A sudden drop in blood volume from hemorrhage
Mechanical obstruction of blood flow in the vascular system
Failure of the heart muscle to contract effectively
Widespread loss of vascular tone leading to pooling of blood
Where can the obstruction occur in obstructive shock? Select the most accurate option from those listed.
Only in peripheral arteries
In the great vessels, heart, or lungs
Only in the microcirculation
Exclusively within the brain vasculature
Match each shock type to its characteristic described in the material.
Obstructive shock
Mechanical obstruction of blood flow
Hypovolemic shock
Complex and dynamic process involving many compensatory mechanisms
Both types
Involve circulatory compromise
Which description aligns with hypovolemic shock in this section?
A static condition with minimal physiologic response
Complex and dynamic process involving many compensatory mechanisms
Blockage of blood flow in the lungs only
Localized vasodilation without volume change
Which statement best describes the initial recognition of shock according to the instructional material?
It is primarily laboratory-based using lactate and base deficit.
It is based on historical and physical findings.
It requires ultrasound confirmation before treatment.
It depends solely on central venous oxygen saturation.
Which group lists the three major categories of markers used to guide resuscitation?
Cardiac output, urine output, and temperature
Hemodynamic stability, tissue perfusion, and oxygen delivery
Electrolytes, coagulation factors, and blood glucose
Arterial blood gases, chest X-ray, and ECG
In the framework presented, which of the following is classified as an upstream parameter?
Lactate
Capillary refill time
Central venous oxygen saturation
Mean arterial pressure (MAP) as part of afterload
Match each category of resuscitation markers with an example marker.
Upstream
Shock index
Microcirculation
Capillary refill time
Downstream
Lactate
Which of the following is listed under microcirculation assessment?
Mucous membrane color
Central venous oxygen saturation
Hemoglobin concentration
Vena cava size
According to the material, preload assessment under upstream parameters includes which measure?
pH/base deficit
CVP and vena cava size
PaO2
Heart rhythm on ECG
Which parameter belongs to the oxygen delivery (DO2) group under upstream markers?
Central venous oxygen (PO2)
Hemoglobin (Hgb)
Lactate
Capillary refill time
Which downstream marker is explicitly named in the material?
Heart rate
Contractility by ultrasound
Lactate
Shock index
Which item is identified as a hemodynamic component under upstream parameters?
pH/base deficit
Capillary refill time
Central venous oxygen saturation
Heart rate
Which pairing correctly aligns an upstream afterload measure with its specific indicator?
Afterload — MAP
Afterload — Lactate
Afterload — PaO2
Afterload — Capillary refill
Which finding best indicates a reduced level of mentation during the initial assessment for shock?
Hyperalertness and rapid responses to stimuli
Loss of interest in the environment with diminished or absent responses to stimuli
Increased engagement with surroundings and talkativeness
Normal attention with occasional distraction
Pale or white mucous membranes during shock most directly reflect which underlying issue?
Excess red blood cells perfusing mucosal capillary beds
Reduced quantity of red blood cells perfusing the capillary beds of the mucosal tissue
Increased tissue oxygen extraction with normal perfusion
Hyperpigmentation unrelated to perfusion
Match each physical assessment indicator with what it suggests in shock.
Slow capillary refill time (CRT)
Poor perfusion
Fast CRT with other perfusion abnormalities
Distributive shock pattern
Red mucous membranes
Finding noted under mucous membrane color
During assessment for shock, what is the primary implication of a slow capillary refill time (CRT)?
Normal perfusion
Poor perfusion
High cardiac output state
Measurement error; CRT is not useful
Which statement about heart rate in shock assessment is most accurate?
Heart rate does not vary with body size
Heart rate varies with body size
Heart rate can only be measured invasively
Heart rate is irrelevant to shock assessment
Pulse quality during shock assessment is primarily determined by which method?
Automated blood pressure cuff
Digital palpation of the femoral pulse
Electrocardiographic amplitude
Auscultation over the apex
Which set best summarizes why clinical signs may differ among patients in shock?
Differences in hydration only
Changes in vasomotor tone leading to either vasoconstrictive or vasodilatory forms of shock
Random patient variability without physiological basis
Errors in measurement of vital signs
Which extremity temperature pattern aligns with altered perfusion in shock according to the assessment focus?
Extremity temperature is not assessed in shock
Extremity temperature is part of the physical assessment and may vary with perfusion changes
Only core temperature matters; extremity temperature is constant
Warm extremities always indicate hypoperfusion
Which parameter listed is specifically described as a tool developed in human medicine to quantify shock severity and response to therapy in the emergency room?
Jugular vein distention
Ultrasonographic caudal vena cava assessment
Shock index (SI)
Lactate concentration
Central venous oxygen saturation
Jugular vein distention is included among additional assessment parameters for evaluating shock.
True
False
Which modality uses ultrasound to evaluate venous status as part of shock assessment?
Central venous oxygen saturation
Ultrasonographic caudal vena cava assessment
Base deficit/base excess
Lactate concentration
Select the parameter that is part of a blood gas profile and helps determine a patient’s acid-base status.
Shock index (SI)
Lactate concentration
Base deficit (BD)/base excess (BE)
Jugular vein distention
Which of the following is explicitly listed as an additional assessment parameter for shock related to tissue perfusion and metabolism?
Lactate concentration
Jugular vein distention
Ultrasonographic caudal vena cava assessment
Shock index (SI)
Match each assessment parameter with the best brief descriptor.
Shock index (SI)
Tool from human medicine for quantifying shock severity and therapy response
Ultrasonographic caudal vena cava assessment
Imaging-based evaluation of venous status
Base deficit/excess
Part of blood gas profile; informs acid–base status
Central venous oxygen saturation
Measure of oxygen saturation in central venous blood
Central venous oxygen saturation is included as an additional parameter for assessing shock.
Included
Not included
Which pair correctly combines a parameter with a stated purpose from the material?
Jugular vein distention — determines acid–base status
Base deficit/base excess — part of a blood gas profile
Lactate concentration — ultrasound measure of caudal vena cava
Shock index — measure of central venous oxygen saturation
Which statement best describes a primary goal of oxygen therapy in shock management?
Maintaining oxygen saturation to support blood oxygenation
Preventing venous catheter infections
Lowering heart rate below baseline
Eliminating the need for arterial blood gases
A patient’s blood oxygenation status is uncertain. What is the most appropriate immediate action?
Wait for lab results before intervening
Provide supplemental oxygen until arterial blood gases or hemoglobin oxygen saturation confirm it is unnecessary
Begin venous catheterization immediately
Start fluid restriction
Which assessment can confirm that supplemental oxygen is not necessary?
Capillary refill time alone
Arterial blood gases or hemoglobin oxygen saturation
Chest X-ray findings
Heart rhythm on ECG
Match each concept with its role in oxygen therapy.
Maintaining oxygen saturation
Primary goal for blood oxygenation
Supplemental oxygen when in doubt
Interim measure until assessment
Arterial blood gases/Hb oxygen saturation
Objective tests confirming oxygen need
Which factor is NOT listed as influencing the selection of a vein to catheterize?
Size and species of the animal
Skill of the operator placing the catheter
Therapeutic goals
Availability of antibiotics
Animal’s problem or disease
According to the material, venous access site selection depends on several factors. Which pairing is correct?
Operator skill — influences which vein can be safely catheterized
Animal’s color — determines vein patency
Room temperature — dictates catheter length
Owner preference — determines catheter gauge
Match each factor with how it can influence vein selection for catheterization.
Size and species of animal
Vein accessibility and appropriate catheter size
Skill of operator
Feasibility and safety of placement
Therapeutic goals
Choice of site to meet intended treatment
Animal’s problem or disease
Site selection adjusted for underlying condition
Which statement best summarizes the decision process for choosing a vein to catheterize?
It is standardized to the cephalic vein for all cases
It depends on animal characteristics, operator skill, therapeutic goals, and the animal’s disease
It should avoid large veins to reduce risk
It is based solely on equipment availability
Which fluid type is commonly employed in the treatment of hypovolemic shock because it has electrolyte concentrations similar to extracellular fluid?
Hypertonic crystalloids
Isotonic crystalloids
Colloids
Free water
Which statement best describes colloids used in fluid resuscitation?
They readily cross capillary membranes
They are poor blood volume expanders compared with isotonic crystalloids
They are large-molecular-weight solutions that do not cross capillary membranes readily
They have electrolyte concentrations identical to intracellular fluid
In terms of expanding blood volume, which option is more effective according to the material?
Isotonic crystalloids
Colloids
Free water
Hypertonic saline
Match each fluid category with its key characteristic.
Crystalloids
Electrolyte concentrations like extracellular fluid
Colloids
Large-molecular-weight; limited capillary crossing
Isotonic crystalloids
Commonly used for hypovolemic shock
Sympathomimetics are indicated when a patient is unresponsive to which initial approach?
Immediate blood transfusion without fluids
Vigorous fluid therapy
Long-term antibiotic therapy
Electrolyte restriction
Which of the following are listed as examples of sympathomimetics for managing shock?
Epinephrine and norepinephrine
Dopamine and dobutamine
Phenylephrine and vasopressin
Atropine and adenosine
When sympathomimetics are used because perfusion and vasomotor tone have not returned to acceptable levels, what monitoring is recommended?
Respiratory rate only
Blood pressure and ECG monitoring
Urine output only
Central venous oxygen saturation alone
Match the clinical parameter with the status that justifies initiating sympathomimetics.
Arterial blood pressure
Has not returned to acceptable levels
Vasomotor tone
Has not returned to acceptable levels
Tissue perfusion
Has not returned to acceptable levels
Which parameter directly reflects arterial oxygenation using a noninvasive sensor in patients with shock?
Electrocardiogram
Oxygen saturation
Central venous pressure
Hematocrit
Which measure provides a continuous assessment of systemic perfusion pressure in shock management?
Arterial blood pressure
Urinary output
Total protein
Electrolytes
Identify the monitoring tool primarily used to detect cardiac rhythm abnormalities during shock.
Central venous pressure
Electrocardiogram
Colloid osmotic pressure
Blood gases
Central venous pressure (CVP) monitoring most directly informs clinicians about which physiologic aspect during shock care?
Pulmonary compliance
Right-sided preload/venous return
Systemic vascular resistance
Arterial oxygen content
Match each monitoring category to an example parameter used in the ongoing evaluation of a patient in shock.
Physiologic parameter
Arterial blood pressure
Laboratory parameter
Hematocrit and total protein
Physiologic parameter
Electrocardiogram
Laboratory parameter
Blood gases and pH
Which parameter from laboratory monitoring best assesses the acid–base status of a patient with shock?
Electrolytes
Colloid osmotic pressure
Blood gases and pH
Total protein alone
A drop in hematocrit and total protein during resuscitation most likely indicates which clinical issue?
Improved oxygenation
Hemodilution or blood loss
Increased cardiac output
Respiratory alkalosis
Which pair lists one physiologic and one laboratory parameter, respectively, used in shock monitoring?
Urinary output; electrolytes
Colloid osmotic pressure; CVP
Hematocrit; ECG
Blood gases; arterial blood pressure
