You are treating a patient with localized osteosarcoma of the distal femur with methotrexate, doxorubicin, and cisplatin (MAP) chemotherapy. At week 10 of treatment, the patient undergoes complete resection of the tumor. Pathology demonstrates 40% necrosis. Which of the following represents the most appropriate further therapy?
Rationale:
D: MAP. Continuing with MAP therapy is essential after observing 40% necrosis, as it indicates a partial response to initial chemotherapy and helps consolidate treatment to improve long-term outcomes.
A: Ifosfamide and etoposide (IE) does not align with the patient's current regimen and lacks the synergistic benefit of combining with the already effective MAP treatment.
B: MAP plus ifosfamide and etoposide (MAPIE) introduces unnecessary complexity without proven superiority, potentially increasing toxicity and complicating treatment without clear additional benefit from the combined regimen.
C: Gemcitabine docetaxel fails to leverage the patient's prior chemotherapy response, lacking relevance to osteosarcoma management and not addressing the specific treatment history and tumor characteristics effectively.
A client is having a bone marrow aspiration and biopsy. What action by the nurse takes priority?
Rationale:
B: Ensure that valid consent is in the medical record. Valid consent is crucial prior to any invasive procedure, such as a bone marrow aspiration and biopsy, as it ensures the client is fully informed and agrees to the procedure, thereby safeguarding their rights and autonomy.
A: Administer pain medication first. While managing pain is important, ensuring valid consent takes precedence to protect the client’s rights before any treatment begins.
C: Have the client shower in the morning. Personal hygiene is beneficial, but it does not address the immediate need for informed consent prior to the procedure.
D: Premedicate the client with sedatives. Although sedation may aid in comfort, obtaining valid consent is essential to respect the client's autonomy before proceeding with any intervention.
An emergency department nurse is triaging a 77-year-old man who presents with uncharacteristic fatigue as well as back and rib pain. The patient denies any recent injuries. The nurse should recognize the need for this patient to be assessed for what health problem?
Rationale:
C: Multiple Myeloma. This condition often presents with fatigue, bone pain, and a lack of recent trauma, making it a plausible underlying cause for the patient’s symptoms, particularly in older adults.
A: Hodgkin disease. This type of lymphoma primarily affects lymph nodes and is typically associated with symptoms like swelling, fever, and weight loss rather than isolated bone pain and fatigue.
B: Non-Hodgkin Lymphoma. While this cancer can cause fatigue and other systemic symptoms, it usually manifests with lymphadenopathy and does not primarily present with significant back and rib pain.
D: Acute Thrombocytopenia. This condition leads to low platelet counts, which can cause bleeding and bruising, but does not typically present with bone pain and uncharacteristic fatigue as primary symptoms.
You have been asked to see a 15-year-old girl who is being referred for evaluation of an ovarian mass. Her history is also significant for secondary amenorrhea, and physical examination shows signs of virilization. As you review her family history, what syndrome will you consider?
Rationale:
B: DICER-1 syndrome is a genetic disorder associated with various tumors, including ovarian masses. The symptoms of secondary amenorrhea and virilization in this 15-year-old girl suggest a potential germline mutation linked to this syndrome, warranting further evaluation.
A: Li-Fraumeni syndrome primarily predisposes individuals to a variety of cancers, but it does not specifically correlate with the ovarian mass and symptoms presented in this case.
C: Turner syndrome mainly affects females with short stature and ovarian dysgenesis, lacking the virilization and specific tumor association seen in this patient's clinical presentation.
D: Beckwith-Wiedemann syndrome is characterized by overgrowth and increased cancer risk, but it does not typically manifest with the specific signs of virilization and ovarian masses observed here.
Thrombocytopenia is absent in:
Rationale:
Thrombocytopenia is absent in Henoch Schonlein purpura. This condition primarily involves small blood vessel inflammation, leading to symptoms like purpura and abdominal pain, without significantly affecting platelet counts.
A: DIC Severe platelet consumption occurs during disseminated intravascular coagulation, resulting in thrombocytopenia and increased risk of bleeding due to the excessive activation of clotting factors.
B: Wiskott Aldrich syndrome This genetic disorder causes immunodeficiency and eczema, along with thrombocytopenia, leading to reduced platelet levels, contrary to the absence of thrombocytopenia in Henoch Schonlein purpura.
D: myelosclerosis This bone marrow condition results in decreased blood cell production, including platelets, leading to thrombocytopenia. The impact on platelet counts distinguishes it from Henoch Schonlein purpura.
A 3-year-old boy with X-linked chronic granulomatosis disease is day +25 after haploidentical bone marrow transplant (father donor) using posttransplant cyclophosphamide as graft-versus-host disease (GVHD) prophylaxis. He engrafted on day +16 and was preparing for discharge when cytomegalovirus (CMV) was noted to be positive on PCR, and he developed a fever and mild rash. His counts have fallen to a WBC of 0.1 and he remains transfusion dependent. What diagnostic evaluations/treatments should you pursue?
Rationale:
D: Send blood cultures, start antibiotics, and treat his CMV with foscarnet. Send rapid chimerism by STR to assess for possible rejection. If donor chimerism is low or absent, work on obtaining an alternative donor for a second procedure.
D is appropriate as it addresses the immediate need for infection control, assesses chimerism for potential rejection, and provides a treatment plan for CMV, crucial in this scenario.
A: Rule out infection by sending blood cultures, start broad spectrum antibiotics, and obtain other diagnostic workup as appropriate. Consider skin biopsy and treat with steroids for likely acute GVHD (aGHVD). This option overlooks the critical need to address the CMV infection and does not prioritize the assessment of chimerism indicative of rejection.
B: Initiate an infectious workup and treat with broad-spectrum antibiotics. Consult with the PICU team because the low blood counts are likely a preseptic presentation. This choice fails to incorporate necessary CMV treatment or chimerism testing, which are vital for comprehensive patient management and determining the risk of rejection post-transplant.
C: Test for possible rejection with rapid FISH chimerism and consider withdrawal of immune suppression if donor chimerism is low. Although assessing chimerism is important, this option neglects immediate infection management and CMV treatment, which are critical in the context of the patient's current status.
A 4-year-old boy is pale with intermittent jaundice and splenomegaly. Laboratory results are as follows: RBC 4.85 M/mcL (N); Hgb 8.6 g/dL (L); Hct 25.8% (L); MCV 81.6 (N); MCHC 38% (H); RDW 20% (H); Retic 7% (H). What are the two best tests to distinguish autoimmune hemolytic anemia from hereditary spherocytosis?
Rationale:
Direct Answer: Hemoglobin electrophoresis and direct antiglobulin test (DAT) are the two best tests to distinguish autoimmune hemolytic anemia from hereditary spherocytosis.
Correct Option Explanation: Hemoglobin electrophoresis helps identify abnormal hemoglobin variants, while the direct antiglobulin test (DAT) detects antibodies attached to red blood cells, crucial for differentiating autoimmune hemolytic anemia from hereditary spherocytosis. Both tests provide essential information regarding the underlying hemolytic process, guiding appropriate diagnosis and management strategies based on the patient's clinical presentation.
A: Free erythrocyte protoporphyrin and IgG levels do not specifically address the differentiation between autoimmune hemolytic anemia and hereditary spherocytosis, lacking the necessary direct evaluation of red blood cell integrity and immune response.
C: Lactate dehydrogenase (LDH) and modified Russell viper venom test fail to provide definitive insights into the autoimmunity or hereditary aspects of the anemia, thus being less relevant for this specific diagnostic purpose.
D: Red cell distribution width (RDW) and mean corpuscular hemoglobin concentration (MCHC) are general indicators of red blood cell characteristics and do not directly differentiate between the two conditions in question.
A 40 year old patient is presented with unilateral palpebral edema and ipsilateral lymphadenopathy. He later develops megaesophagus and megacolon as complications. Which of the following vector is responsible for this parasitic infection?
Rationale:
C: Rhodnius prolixus is the vector responsible for the parasitic infection causing unilateral palpebral edema, lymphadenopathy, megaesophagus, and megacolon, indicative of Chagas disease transmitted by this triatomine bug.
A: Glossina morsitans transmits African sleeping sickness, not the specific symptoms presented, such as megaesophagus and megacolon, which are characteristic of Chagas disease.
B: Ixodes scapularis is the tick vector for Lyme disease, unrelated to the symptoms of palpebral edema and megaesophagus associated with Chagas disease.
D: Simulium damnosum is the black fly vector for river blindness, which does not align with the symptoms described, specifically megaesophagus and megacolon related to Chagas disease.
A 4-year-old child with acute lymphoblastic leukemia is receiving high-dose methotrexate during interim maintenance. He receives ondansetron and ðррõтitant during his stay, which control his nausea and vomiting well. These medications work by inhibiting signaling in which part of the brain?
Rationale:
Direct Answer: The medications work by inhibiting signaling in the vomiting center of the brain.
Correct Option Explanation: Ondansetron and ðррõтitant effectively block signals in the vomiting center, a crucial area in the medulla that triggers nausea and vomiting responses. By targeting this region, these medications help mitigate the adverse effects of high-dose methotrexate treatment, ensuring better management of symptoms associated with chemotherapy in children.
A: Vestibular system This area is involved in balance and spatial orientation, not directly in the regulation of nausea and vomiting triggered by chemotherapy.
B: Cerebral cortex This region is primarily responsible for higher cognitive functions, not directly involved in the autonomic processes that manage nausea and vomiting responses.
C: Hypothalamus This part of the brain regulates various autonomic functions but does not specifically control the vomiting reflex, which is governed by the vomiting center.
The nurse is documenting findings after completing data collection with a patient. What term should the nurse use to document a large area of discoloration from hemorrhage under the skin?
Rationale:
D: Ecchymosis refers to a large area of discoloration resulting from bleeding beneath the skin, typically appearing as a bruise. It is often associated with trauma or coagulation disorders, making it the appropriate term for documenting significant hemorrhagic changes observed during data collection.
A: Pallor denotes a reduction in skin color or paleness, which does not relate to discoloration caused by bleeding.
B: Rubor refers to redness of the skin, typically due to inflammation or increased blood flow, and does not describe discoloration from hemorrhage.
C: Petechiae are small, pinpoint hemorrhages that appear as red or purple spots on the skin, representing a different and smaller scale of bleeding than ecchymosis.
Which of the following is not the criteria in the international prognostic index for non Hodgkin's lymphoma?
Rationale:
C: Lymphocyte count. The international prognostic index for non-Hodgkin's lymphoma evaluates factors like age, LDH levels, number of extranodal sites, and performance status, but does not consider lymphocyte count.
A: Number of extranodal sites. This criterion is crucial as it indicates disease extent and aggressiveness, significantly impacting patient prognosis in non-Hodgkin's lymphoma assessments.
B: LDH level. Lactate dehydrogenase levels reflect tumor burden and metabolic activity, serving as a critical prognostic factor in evaluating patient outcomes in non-Hodgkin's lymphoma.
D: Performance status. This criterion assesses a patient's overall health and functional ability, which is vital for predicting treatment response and survival in non-Hodgkin's lymphoma patients.
A home health nurse is caring for a patient with multiple myeloma. Which of the following interventions should the nurse prioritize when addressing the patient's severe bone pain?
Rationale:
Helping the patient manage the opioid analgesic regimen. Effective pain management in multiple myeloma often necessitates opioids due to the severity of bone pain, making it crucial to optimize their use.
A: Implementing distraction techniques. While helpful for mild discomfort, distraction techniques lack the potency needed for severe pain relief associated with multiple myeloma's complications.
B: Educating the patient about the effective use of hot and cold packs. These methods may provide temporary relief but do not address the underlying severe pain issues faced by the patient.
C: Teaching the patient to use NSAIDs effectively. Non-steroidal anti-inflammatory drugs may not suffice for the intense pain experienced in multiple myeloma, as opioids are more appropriate for managing severe cases.
A patient has an altered level of T and B cells. The nurse realizes that these cells are members of which cell type?
Rationale:
Lymphocytes are the cell type that includes T and B cells.
Lymphocytes play a crucial role in the immune system, specifically in adaptive immunity. T cells are involved in cellular responses, while B cells produce antibodies, making them essential for recognizing and responding to pathogens.
A: Platelets are involved in blood clotting and do not participate in immune responses like T and B cells.
B: Eosinophils are primarily associated with allergic reactions and combating parasitic infections, not the adaptive immune response mediated by T and B cells.
D: Red blood cells are responsible for oxygen transport and do not function in immune responses, distinguishing them from lymphocyte roles.
The mean cell volume of the patient is 90 fl and the reticulocyte production index is low. Which of the following is the most possible cause of anemia in this patient?
Rationale:
Aplastic anemia presents with a mean cell volume of 90 fl and a low reticulocyte production index, indicating a failure of the bone marrow to produce sufficient red blood cells. This aligns with the patient's condition.
A: Thalassemia leads to microcytic anemia with normal or elevated reticulocyte counts, differing from the low reticulocyte production index observed here.
B: Vitamin B12 deficiency typically results in macrocytic anemia and elevated reticulocyte counts, contrasting with the patient's normal cell volume and low reticulocyte production index.
D: Sideroblastic anemia usually features normal or elevated reticulocytes and microcytic red blood cells, inconsistent with the observed low reticulocyte production index and mean cell volume.
A nurse is caring for a client who is about to begin alteplase therapy to treat pulmonary embolism. Which of the following drugs should the nurse have available in the event of a severe adverse reaction?
Rationale:
Aminocaproic acid should be available in the event of a severe adverse reaction during alteplase therapy.
Alteplase is a thrombolytic agent that dissolves existing clots by converting plasminogen to plasmin, leading to fibrinolysis. A severe adverse reaction, typically hemorrhage, necessitates an antifibrinolytic. Aminocaproic acid is a synthetic amino acid that inhibits plasminogen activators and plasmin, effectively reversing the fibrinolytic state induced by alteplase and thereby controlling bleeding complications.
A: Vitamin K Vitamin K reverses the effects of warfarin by promoting synthesis of clotting factors, not directly antagonizing the fibrinolytic action of alteplase.
C: Protamine Protamine is an antagonist for heparin, binding to it to neutralize its anticoagulant effects; it has no role in reversing alteplase-induced fibrinolysis.
D: Deferoxamine Deferoxamine is a chelating agent used to treat iron toxicity; it bears no pharmacological relevance to managing complications from alteplase therapy.
Severe and extensive hemolysis causes:
Rationale:
Severe and extensive hemolysis causes shock.
Severe and extensive hemolysis leads to a rapid destruction of red blood cells, releasing hemoglobin and other cellular components. This massive loss of oxygen-carrying capacity significantly reduces tissue perfusion and oxygen delivery throughout the body. The resulting widespread hypoxia, coupled with potential inflammatory responses from cellular debris, can precipitate hypovolemic or distributive shock, a life-threatening circulatory collapse.
A: Leg ulcers
Leg ulcers are a chronic complication of long-term hemolytic conditions like sickle cell anemia, not an acute consequence of severe, extensive hemolysis itself, which demands immediate systemic response.
C: Priapism
Priapism, a prolonged painful erection, is a specific vaso-occlusive crisis seen in conditions like sickle cell disease, not a direct, immediate, or universal result of generalized
A patient diagnosed with acute myelogenous leukemia has just been admitted to the oncology unit. When writing this patient's care plan, what potential complication should the nurse address?
Rationale:
Hemorrhage is a potential complication the nurse should address when writing the care plan for a patient with acute myelogenous leukemia.
Acute myelogenous leukemia severely impairs bone marrow function, leading to a profound reduction in platelet production (thrombocytopenia). This platelet deficiency significantly compromises the blood's clotting ability, making patients highly susceptible to spontaneous bleeding, bruising, and severe hemorrhage from minor trauma or internally. Therefore, meticulous monitoring for bleeding and implementing preventive measures are critical components of the nursing care plan.
A: Pancreatitis Pancreatitis, inflammation of the pancreas, is not a primary or common direct complication of acute myelogenous leukemia itself. While other conditions might coexist, AML does not inherently predispose individuals to pancreatic inflammation.
C: Arteritis Arteritis, characterized by inflammation of the arteries, is an autoimmune or inflammatory vascular condition. It bears no direct pathological link or increased incidence as a specific complication arising from the cellular dysregulation inherent in acute myelogenous leukemia.
D: Liver dysfunction While AML treatment can sometimes affect the liver, primary liver dysfunction is not an immediate or direct complication of the disease itself. Bone marrow failure and bleeding risks are far more immediate and common concerns.
A nurse is administering epoetin intravenously to a client who has renal failure. Which of the following actions should the nurse take?
Rationale:
Administer via IV bolus over 1 to 3 min.
Epoetin alfa is commonly administered intravenously as a bolus over 1 to 3 minutes for clients with renal failure. This method ensures efficient delivery of the medication to stimulate erythropoiesis without prolonged infusion times. Rapid administration is generally well-tolerated and aligns with standard pharmacological guidelines for epoetin, optimizing therapeutic effects and patient convenience in a clinical setting.
A: Shake the vial before using. Epoetin is a protein-based drug; shaking can denature the protein, reducing its efficacy. Gentle swirling, not vigorous agitation, is appropriate to mix the solution, preserving its pharmacological integrity and therapeutic benefit.
C: Dilute the drug first with D5W. Epoetin should not be diluted with other solutions like D5W because it can alter the drug's stability and effectiveness. Administering it undiluted preserves its intended concentration and ensures proper pharmacological action.
D: Save the used vial for the next dose. Epoetin vials are typically single-use due to the absence of preservatives, making them susceptible to bacterial contamination once accessed. Discarding any remaining solution after one use prevents potential infection risks and maintains sterility.
Which of the following alters the function of thrombin from a procoagulant protein to one that downregulates the formation of fibrinogen?
Rationale:
Thrombomodulin alters the function of thrombin from a procoagulant protein to one that downregulates the formation of fibrinogen.
Thrombomodulin is an endothelial cell surface receptor that binds thrombin. This binding changes thrombin's substrate specificity, transforming it from a procoagulant enzyme that cleaves fibrinogen into fibrin to an anticoagulant. The thrombin-thrombomodulin complex then activates Protein C, which, along with Protein S, degrades clotting factors Va and VIIIa, thus downregulating further fibrinogen conversion and clot formation.
A: Protein C: Protein C is activated by the thrombin-thrombomodulin complex, becoming an anticoagulant that inactivates factors Va and VIIIa, but it does not directly alter thrombin's function or its substrate specificity itself.
B: Protein S: Protein S acts as a cofactor for activated Protein C, enhancing its anticoagulant activity by aiding in the degradation of factors Va and VIIIa, but it does not directly interact with or modify thrombin's enzymatic role.
C: Antithrombin: Antithrombin is a serpin that directly inhibits thrombin and other coagulation factors by forming an irreversible complex, effectively removing them from circulation, rather than changing thrombin's enzymatic specificity.
A nurse reviews the laboratory data for an older patient. The nurse would be most concerned about which finding?
Rationale:
A white blood cell (WBC) count of 2800/L would be most concerning for an older patient.
A WBC count of 2800/L indicates leuk
A 5-year-old girl with a previously normal CBC now presents in your office with a hemoglobin of 8.5 g/dL, corrected reticulocyte count of 0.1%, and mean corpuscular volume of 80 fl. White cells and platelets are normal in number and morphology. Bilirubin, LDH, BUN, creatinine, and urinalysis are normal. Direct and indirect antiglobulin tests are negative. Workup for infection, including parvovirus, is negative. Occult blood in her stools is negative. Physical examination is unremarkable. She has had no restriction in her energy or activities and the family agrees she is 'fine.' What is the most appropriate next step in management?
Rationale:
Observe serial hemoglobin values closely is the most appropriate next step in management.
This child presents with mild, asymptomatic anemia (Hb 8.5 g/dL) and a low reticulocyte count,
A newborn male has severe bleeding after circumcision, resulting in the need for a blood transfusion. You are called to consult on this child, and you diagnose him with severe hemophilia A. Upon taking a family history, you note that no other family members have hemophilia, other bleeding disorders, or a bleeding diathesis. Which of the following is the most likely outcome of genotyping the Factor VIII gene?
Rationale:
An inversion mutation in the F8 gene will be identified.
Severe hemophilia A in a patient without family history strongly suggests a de novo mutation. Large inversions, particularly involving introns
The nurse is assessing a client experiencing anemia. Which laboratory findings will the nurse expect for this client? (Select all that apply.)
Rationale:
A client experiencing anemia will exhibit a decreased red blood cell count.
Anemia is fundamentally characterized by a reduction in the total number of circulating red blood cells or a decrease in their oxygen-carrying capacity.
A patient who is taking warfarin (Coumadin) 5 mg daily has an international normalized ratio (INR) of 2.5. It is time to administer the next dose of Coumadin. What should the nurse do?
Rationale:
Administer the daily Coumadin as ordered.
Administering the daily Coumadin as ordered is appropriate because an INR of 2.5 falls within the typical therapeutic range of 2.0-3.0 for patients receiving warfarin for most indications. This value indicates effective anticoagulation without excessive risk of bleeding, making continued dosing essential to maintain the desired anticoagulant effect and prevent thrombotic events as prescribed by the physician.
A: Notify the physician STAT. An INR of 2.5 is within the therapeutic window for most warfarin indications, so immediate physician notification is unwarranted. This value reflects effective, safe anticoagulation, requiring no emergent intervention or dose adjustment.
B: Hold the dose of Coumadin. Holding the dose would disrupt the therapeutic anticoagulation, potentially allowing the INR to fall below the desired range. This action could increase the patient's risk for thrombotic events, counteracting the medication's purpose.
C: Prepare to administer vitamin K. Administering vitamin K reverses warfarin's anticoagulant effects, which is indicated for dangerously high INRs or active bleeding. An INR of 2.5 is therapeutic, thus vitamin K administration would be inappropriate and counterproductive.
Which of the following instructions should a nurse give a client with non-Hodgkin's lymphoma who is being treated with radiation and chemotherapy?
Rationale:
Increase fluid intake is an essential instruction for a client undergoing radiation and chemotherapy for non-Hodgkin's lymphoma.
Radiation and chemotherapy frequently cause side effects such as nausea, vomiting, diarrhea, and muc
What is the nurse's priority when caring for a client who just completed a bone marrow aspiration and biopsy?
Rationale:
Check the pressure dressing frequently for signs of excessive or active bleeding is the nurse's priority when caring for a client who just completed a bone marrow aspiration and biopsy.
Following a bone marrow aspiration and biopsy, the puncture site is highly vascular, making bleeding the most immediate and serious potential complication. A pressure dressing is applied to mitigate this
A peripheral blood smear showing increase in numbers of neutrophils, band cells, basophils, eosinophils, and platelets is most suggestive
Rationale:
Chronic myelocytic leukemia is most suggested by an increase in neutrophils, band cells, basophils, eosinophils, and platelets on a peripheral blood smear.
Chronic myelocytic leukemia (CML) is a myeloproliferative neoplasm characterized by the overproduction of mature and immature granulocytes (neutrophils, eosinophils, basophils) and often platelets. The presence of increased band cells signifies a "left shift," common in CML, indicating increased bone marrow activity and release of less mature forms into circulation. This constellation of findings is highly characteristic of CML's chronic phase.
A: Acute myeloid leukemia This condition features an abundance of immature myeloid blast cells, typically exceeding 20% in blood or bone marrow, rather than a broad increase across multiple mature and immature myeloid lineages.
B: Acute lymphoid leukemia This malignancy involves the rapid proliferation of immature lymphoid blast cells, not mature or immature myeloid cells, nor does it typically present with increased platelets or granulocytic forms.
D: Chronic lymphocytic leukemia This disorder is defined by an accumulation of mature, functionally incompetent lymphocytes, specifically B-cells, and does not involve the proliferation of myeloid cell lines or platelets as described.
Which of the following best characterizes the function of ferroportin in iron metabolism?
Rationale:
Ferroportin's function is best characterized as a transmembrane iron exporter.
Correct Option Explanation:
Ferroportin is the sole known cellular iron exporter, facilitating the release of iron from various cells, including enterocytes, macrophages, and hepatocytes, into the circulation. This transmembrane protein is crucial for systemic iron distribution and maintaining iron homeostasis. Its activity is tightly regulated by hepcidin, which binds to ferroportin, inducing its internalization and degradation, thereby controlling the amount of iron exported from cells.
Incorrect Options Explanation:
A: A form of storage iron in intestinal mucosal cells. Ferritin stores iron within cells, preventing oxidative damage. Ferroportin, in contrast, actively moves iron out of cells, rather than sequestering it intracellularly for storage purposes.
B: A transport protein in the plasma. Transferrin transports iron within the plasma, delivering it to various tissues. Ferroportin is a cellular protein embedded in membranes, mediating iron efflux from cells, not plasma transport itself.
C: A receptor protein on the surface of erythroid progenitors. Transferrin receptor 1 (TfR1) facilitates iron uptake by erythroid progenitors for hemoglobin synthesis. Ferroportin functions as an exporter, releasing iron from cells, not as an uptake receptor on progenitors.
The nurse is caring for a patient who has a white blood cell (WBC) count of 8000/mm³. What concern should the nurse have about this finding?
Rationale:
There is no concern; this is a normal finding.
A normal white blood cell (WBC) count typically ranges from 4,500 to 11,000/
A nurse is caring for a client who is taking ferrous sulfate to treat iron deficiency anemia and develops iron toxicity. Which of the following drugs should the nurse expect to use to treat this complication?
Rationale:
Deferoxamine is the drug the nurse should expect to use to treat iron toxicity.
Deferoxamine is a potent chelating agent specifically indicated for acute iron poisoning and chronic iron overload. It binds to free iron in the bloodstream, forming a stable complex that can then be safely excreted through the kidneys, thereby reducing systemic iron levels and mitigating organ damage caused by excessive iron accumulation. This targeted action makes it the primary antidote for iron toxicity.
A: Flumazenil Flumazenil reverses benzodiazepine overdose by blocking GABA receptors, restoring normal central nervous system function. It has no therapeutic effect on heavy metal poisoning or iron accumulation in the body.
B: Acetylcysteine Acetylcysteine is the antidote for acetaminophen overdose, working by replenishing glutathione stores to detoxify harmful metabolites. It does not chelate or interact with iron to mitigate iron toxicity.
C: Naloxone Naloxone is an opioid antagonist, specifically used to reverse opioid-induced respiratory depression and central nervous system depression. It possesses no pharmacological activity relevant to treating iron toxicity or promoting its excretion.