Physiologic Balance

Scenarios and items in this section focus on issues of physiologic balance of the body’s internal chemical (acid-base, oxygen, and electrolyte), fluid, coagulation, endocrine, and thermal environment. These concepts are considered together because each:



• Has defined “balance” parameters (normal values)


• Causes measurable outcomes related to deficit (hypo) or excess (hyper)


• Produces pharmacokinetic and pharmacodynamic effects related to anesthetics and medications


• Suggests nursing process responses to restore balance












































































































































































































ESSENTIAL CORE CONCEPTS AFFILIATED CORE CURRICULUM CHAPTERS
Nursing Process
Assessment

Chapters 3, 35, 56
Planning and Implementation Chapters 3, 4, 57
Evaluation
Chemical and Electrolyte Balance
Acid-Base Concepts Chapters 25, 31
Acidosis
Respiratory
Metabolic
Alkalosis
Respiratory
Metabolic
Compensation, Mixed Imbalances
Buffers
Renal
Respiratory
Interpreting Arterial Blood Gases (ABGs)
Oxygenation Chapter 25
Hypoventilation
Hypoxemia
Oxygen Delivery Systems Chapter 31
Toxicity
Restoring Balance
Electrolyte Stability Chapter 24
Concentration
Anions
Cations
Deficits and Excesses
Causes
Symptoms
Nursing Assessment and Intervention
Principles
Diffusion
Restoring Balance
Fluid Balance Chapter 24
Composition: Extracellular, Intracellular
Distribution and Volumes
Fluid Regulation: Loss, Gain, and Balance
Causes
Compartment Shifts
Symptoms
Principles and Concepts
Hydrostatic Pressure
Osmosis
Osmolality
Tonicity (iso-, hypo-, and hyper-)
Volume Replacement
Colloid
Crystalloid
Restoring Balance
Hematologic Balance Chapter 34
Blood Components
Structure and function
Antigens and Antibodies: ABO, Rh, and Immunity
Platelets and Thrombin: Hemostasis and Clots
Red Cells: Anemias, Hemolysis, and Sickling
White Cells: Leukemias
Order and Disorder
Characteristics and Symptoms
Blood Loss
Coagulation Cascade
Disseminated Intravascular Coagulation (DIC)
Normal Values
Restoring Balance
Transfusion Therapy
Blood Components
Hemolysis, Allergy, and Anaphylaxis
Infection Transmission (Hepatitis)
Human Immunodeficiency Virus (HIV) and Acquired Immunodeficiency Syndrome (AIDS)
Virus
Standard Precautions
Thermal Balance Chapter 28
Hypothermia
Concepts of Heat Loss
Heat Generation
Postanesthesia Shivering
Active Rewarming
Hyperthermia
Malignant
Sepsis
Endocrine Balance Chapter 41
Glands and Hormones
Assessment and Function Chapters 16, 18, 19
Adrenal: Mineralocorticoids, Glucocorticoids
Pancreas: Glucose Balance
Parathyroid: Calcium Balance
Pituitary: “Master” Regulation
Thyroid: Metabolic Rate
Excesses and Deficits
Characteristics and Symptoms
Feedback Regulation
Restoring Balance
Anesthetic Interactions
Surgical Interventions
Nursing Responsibilities


ITEMS 7.1–7.22




7.1. Aldosterone release does all the following except:


a. promotes reabsorption of potassium and excretion of sodium.


b. increases circulating blood volume.


c. prevents acidosis.


d. increases reabsorption of sodium and excretion of potassium.


7.2. Which of the following factors places the patient most at risk for acidosis?


a. A PaCO2 of 46 mmHg on O2 at 6 L/min


b. A temperature of 35.4° C (95.7° F) with shivering


c. A 5-year history of smoking


d. An HCO3 level of 23 mEq/L


7.3. After a bilateral adrenalectomy because of metastatic cancer, a cortisone titration was administered during general anesthesia and is continued in the PACU to:


a. promote catecholamine level stability.


b. prevent hemorrhagic shock.


c. prevent hypernatremia.


d. vasoconstrict the renal blood vessels.


7.4. The most common blood transfusion risk is:


a. acquisition of hepatitis.


b. exposure to bacterial contaminates.


c. ABO/Rh incompatibility reaction.


d. transfusion-related acute lung injury.


7.5. While caring for an adrenalec-tomy patient, the PACU nurse can anticipate:


a. polyuria related to intraoperative manipulation of the kidneys.


b. positioning the patient on the non-operative side.


c. vigilant cardiac assessment for signs of shock.


d. collecting serum electrolytes every 6 hours postoperatively.


7.6. Which of the following statements about electrolytes is not true?


a. Electrolytes dissociate in solution to form ions.


b. Composition of electrolytes in each compartment varies.


c. Electrical balance of cations is greater than anions.


d. The major ions found in extracellular fluid are chloride and sodium.


7.7. The perianesthesia nurse observes that a patient with cirrhosis and an actively bleeding gastric ulcer received 5 units of packed red blood cells (RBCs) during a partial gastrectomy, vagotomy, and pyloroplasty. A unit of whole blood infuses now, and bleeding has abated. This patient has an increased potential for which of the following?


a. Hypoglycemia related to banked packed cells


b. Hyperkalemia related to respiratory alkalosis


c. Hypocalcemia related to citrate preservative


d. Hyponatremia related to hemodilution


7.8. One type of surgery that may include planned perioperative hypothermia includes:


a. vascular procedures.


b. neurosurgical procedures.


c. eye procedures.


d. orthopedic procedures.


7.9. Blood type O negative is considered the “universal donor” because it carries:


a. no antigens.


b. no antibodies.


c. antigens to blood types A, B, and O.


d. antibodies for type O.



7.11 A preoperative complete blood count (CBC) is:


a. a requirement for Medicare patients ages 65 years and older.


b. an effective screening tool for undiagnosed coagulopathies.


c. recommended before any surgical case requiring endotracheal intubation.


d. indicated on a selective basis related to patient history and surgical procedure.

NOTE: Consider items 7.12-7.14 together.


7.12 A male patient is recovering from general anesthesia in the Phase 1 PACU after a 3-hour partial gastrectomy. Arterial blood gases (ABGs) ordered by the surgeon, collected 30 minutes after PACU admission, showed pH=7.28; PaO2=80 mmHg; PaCO2=67 mmHg; HCO3=26 mEq/L. These results indicate:


a. uncompensated metabolic acidosis.


b. partially compensated respiratory acidosis.


c. simultaneous respiratory and metabolic acidosis.


d. uncompensated respiratory acidosis.


7.13 Based on the ABG results, the nurse can anticipate the patient demonstrating all the following except:


a. tachycardia.


b. opioid deprivation.


c. mental confusion.


d. slow, shallow breathing.


7.14 After ensuring the patient has a patent airway with an adequate oxygen device in place, the next most immediate nursing action is to:


a. report the ABG results to the surgeon.


b. call for a ventilator.


c. initiate a stir-up regimen.


d. check the intubation equipment.


7.15 The primary goal of transfusing packed RBCs is to:


a. maintain hemoglobin level of 10 g/dL.


b. increase circulating oxygen-carrying capacity.


c. replace diminishing clotting factors.


d. stimulate production of clotting factors.


7.16 The nurse caring for a postoperative type 1 diabetic patient who received epidural anesthesia is aware that:


a. gastroparesis increases intestinal mobility in type 1 diabetics.


b. peripheral neuropathy will not affect bladder function.


c. pain assessment is uncompromised by physiologic changes.


d. urinary catheterization is guardedly performed in the absence of spontaneous voiding before discharge.


7.17 After the infusion of 1 unit of packed RBCs, the postanesthesia nurse would expect a post-transfusion hemoglobin and hematocrit (Hgb & Hct) to show an increase of:


a. 0.5 g Hgb and 1.5% Hct.


b. 1 g Hgb and 3% Hct.


c. 1.5 g Hgb and 5% Hct.


d. 2 g Hgb and 10% Hct.



7.19 Thyroid storm can occur up to 18 hours postoperatively and is characterized by:


a. decreased respirations, atrial flutter, and convulsions.


b. sweating, dehydration, and tachycardia.


c. hypotension followed by hypertension and hyperthermia.


d. agitation, atrial fibrillation, and pulmonary system collapse.


7.20 The specific indication for fresh frozen plasma (FFP) is to:


a. expand circulating volume.


b. replace acute blood loss.


c. correct coagulation deficiencies.


d. treat thrombocytopenia.


7.21 Body temperature is regulated in which part of the brain?


a. Pons


b. Hypothalamus


c. Medulla


d. Hypophysis

During a lumbar decompression and fusion of vertebrae L2 to S1, a female patient’s estimated blood loss was 800 mL. Her Hgb in PACU is 7.2 g/dL, and the surgeon orders an infusion of 2 units of autologous blood. The blood bank technician informs the PACU nurse that the patient has “cold agglutinins.”


7.22 Safe infusion of autologous blood requires:


a. a 22-gauge, intermediate-length cath-eter.


b. concurrent infusion with 5% dextrose in water.


c. blood pressure assessment after infusing 150 mL.


d. replacement of blood filter after the second unit.

ITEMS 7.23–7.51




7.23 Red blood cell production is:


a. inhibited by the spleen.


b. stimulated by the kidney.


c. initiated by plasma proteins.


d. controlled by hepatic enzymes.


7.24 A female patient is having a hypophy-sectomy procedure under general anesthesia because of a diagnosed tumor. This tumor resulted in a decreased hormone secretion from the involved gland. The nurse can expect all the following except:


a. intolerance to hyperthermia.


b. decreased heart rate.


c. less anesthetic medications required.


d. intolerance to hypothermia.


7.25 The operative approach commonly used for a hypophysectomy procedure is:


a. temporal craniotomy.


b. transsphenoidal resection via a posterior palate incision.


c. occipital craniotomy.


d. transsphenoidal resection in front of the hard palate.


7.26 Old red blood cells are normally:


a. removed by the spleen.


b. excreted in bile.


c. absorbed by the liver.


d. broken down in the small intestine.


7.27 Which of the following statements regarding pulse oximetry is true?


a. Readings in the 80% to 100% range are considered an accurate comparison to ABGs.


b. Readings are less reliable in anemic patients and children.


c. Ambient light at the sensor site can alter readings.


d. Cardiac dysrhythmias do not affect readings.


7.28 A type 2 male diabetic has a history of successful blood sugar management by careful adherence to a diabetic exchange diet, regular brisk walks for exercise, and daily oral metformin doses. The patient arrives in the PACU with a blood glucose level of 251 mg/dL. The nurse understands that this elevation is most likely related to:


a. hemoconcentration.


b. an increase in adrenal cortisol secretion.


c. anesthetic inhibition of pancreatic enzyme production.


d. intraoperative hydration with 1000 mL of 5% dextrose solution in water.


7.29 The primary role of parathormone is to:


a. retain serum phosphorus.


b. regulate calcium concentration.


c. metabolize vitamin D.


d. stimulate calcitonin production.


7.30 Sickle cell disease is the result of:


a. bone marrow suppression.


b. an autoimmune disease.


c. endocrine insufficiency.


d. an inherited genetic trait.



7.32 Respiratory alkalosis may be caused by:


a. tumors of the medulla and brainstem.


b. pain, decreased carbonic acid levels, and anxiety.


c. appropriate mechanical ventilation.


d. pregnancy and surgical manipulation of the brainstem.


7.33 A patient on long-term steroid therapy experiences suppressed cortisone production. The incapacity to generate endogenous adrenocorticoids can:


a. cause an exaggerated response to surgical stressors.


b. necessitate postoperative administration of dexamethasone.


c. require postoperative administration of parenteral hydrocortisone.


d. require decreased steroid replacement doses in the preoperative period.


7.34 Hypertonic intravenous (IV) solutions:


a. cause water to move from the cell to the serum.


b. have an osmolality less than 340 mOsm/L.


c. are more concentrated in the intracellular fluid.


d. are infrequently used for ambulatory surgical procedures.


7.35 In the immediate postoperative period, the hemoglobin and hematocrit values of a stable 47-year-old male after elective total knee replacement are Hgb 11 g/dL and Hct 35%. Reported blood loss was 200 mL; IV fluids given were 2600 mL of lactated Ringer’s. The postanesthesia nurse recognizes that the patient’s Hgb and Hct:


a. are within normal ranges.


b. must be reported as crisis values.


c. may be a result of hemodilution.


d. indicate the need for colloid volume expansion.


7.36 During emergency treatment of abdominal hemorrhage, rapidly infusing 4 units of packed red blood cells through a blood warmer:


a. eliminates the potential for cell hemolysis.


b. increases the likelihood of serum hypokalemia.


c. reduces the risk of allergic reaction.


d. promotes peripheral vasodilation for comfort.


7.37 The drug of choice in the treatment of malignant hyperthermia (MH) is:


a. succinylcholine.


b. etomidate.


c. dantrolene.


d. diazepam.


7.38 During an inflammatory response, leukocytes function within the:


a. bone marrow.


b. endothelium.


c. capillary bed.


d. interstitial space.


7.39 Polycythemia may be a response to all the following except:


a. high altitude.


b. vitamin B12 deficiency.


c. acute infection.


d. leukemia.


7.40 Endocrine changes that occur in the elderly patient population result in which of the following?


a. The greatest decline in pancreatic function between ages 70 and 80 years


b. Decreased vitamin A absorption


c. A lower plasma concentration of antidiuretic hormone


d. Decreased ability to metabolize glucose


7.41 Serum calcium deficiency is of concern when administering muscle relaxants because hypocalcemia:


a. promotes repolarization of depolarizing neuromuscular blocking agents.


b. potentiates nondepolarizing neuromuscular blocking agents.


c. potentiates neuromuscular transmission.


d. increases the amount of acetylcholine release.



7.43 A 62-year-old female patient arrives in the preoperative unit at 8 am for an exploratory bowel procedure. She reports completing the bowel prep as instructed with excellent results and maintaining NPO status for 8 hours; she states that she is feeling “exceptionally weak” today. Potential causes for the reported weakness include all except:


a. hypercalcemia related to fasting.


b. dehydration.


c. poor sleep from preoperative anxiety and the stress response.


d. hypokalemia related to electrolyte depletion from the bowel prep.


7.44 Clinical symptoms of Addisonian crisis include all the following except:


a. hypertension.


b. azotemia.


c. flaccid muscles in the extremities.


d. nausea and vomiting.


7.45 A male patient is admitted for repair of an incarcerated hernia. He has been on warfarin (Coumadin) since having a mitral valve replacement 2 years ago and took his usual dose 16 hours before admission. The admitting perianesthesia nurse recognizes that:


a. surgery must be postponed for 24 hours.


b. infusion of platelets may be therapeutic.


c. administration of vitamin K may be indicated.


d. the partial thromboplastin time (PTT) level will suggest appropriate perioperative management.


7.46 The drug of choice to administer in the PACU if Addisonian crisis is suspected would be:


a. hydrocortisone.


b. potassium sulfate.


c. sodium chloride.


d. dexamethasone.


7.47 Which of the following statements best describes properties of a nonrebreathing O2 mask?


a. It requires a flow rate of 10 to 15 L/min of O2.


b. The leaflet valves at both exhalation ports should close.


c. The O2 delivery level can exceed 80%.


d. There is no risk of suffocation when using this device.


7.48 A diabetic patient exhibits symptoms of tachypnea, polyuria, tachycardia, hyperkalemia, and hypotension. The perianesthesia nurse recognizes these symptoms as consistent with:


a. insulin overdose.


b. diabetic acidosis.


c. lactic acidosis.


d. a blood sugar below 70 mg/dL.


7.49 The most important preoperative considerations for a patient after a total thyroidectomy procedure include all the following except:


a. management of cardiovascular re-quirements.


b. patient education regarding postoperative positioning of head and neck.


c. administration of antithyroid medi-cations.


d. management of hyperthermia.

Jul 11, 2016 | Posted by in NURSING | Comments Off on Physiologic Balance

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