Blood and Marrow Transplant Foundations

Blood and Marrow Transplant Foundations

Blood and marrow transplant (BMT), also called hematopoietic stem cell transplant (HSCT), treats hematologic malignancies (leukemia, lymphoma, myeloma) and some nonmalignant disorders. The trajectory: evaluation, conditioning, cell infusion (day 0), the cytopenic nadir, engraftment, discharge prep, frequent monitoring, and long-term follow-up. It is a multi-week high-risk process, not a single day. OCN items focus on distinguishing transplant types, infusion safety, neutropenic-fever urgency, and GVHD recognition.

Major transplant types

Conditioning (high-dose chemotherapy with or without total body irradiation) eradicates disease, suppresses the recipient immune system to allow donor engraftment, and creates marrow space. The nurse administers supportive medications per order and watches for mucositis, nausea/vomiting, diarrhea, hemorrhagic cystitis (cyclophosphamide - mesna and hydration are protective), and renal, hepatic, pulmonary, cardiac, or neurologic toxicity.

Cell infusion and the nadir

Stem cell infusion resembles a blood-product transfusion but is a major milestone for families. The nurse verifies patient identity, product data, premedications, emergency readiness, vitals, and central line patency. Cryopreserved autologous products contain dimethyl sulfoxide (DMSO), which causes a garlic/creamed-corn odor, nausea, flushing, throat irritation, and - watch for these - bradycardia and blood-pressure swings (both hyper- and hypotension); rare anaphylaxis. Monitor vitals closely and report changes.

After conditioning the patient enters the nadir: neutropenia, anemia, and thrombocytopenia. Infection prevention is central, and fever in neutropenia is an emergency even when the patient looks well (a single temperature of 38.3 C or 38.0 C for one hour with ANC below 500/mm3). Assess temperature trends, chills, line-site change, cough, dyspnea, oral lesions, urinary and abdominal symptoms, skin lesions, mental status, and hemodynamics. Thrombocytopenia: epistaxis, petechiae, gum bleeding, hematuria, melena, headache, neurologic change. Anemia: dyspnea, dizziness, chest discomfort, activity intolerance.

Engraftment and complications

Engraftment means the graft is producing blood cells; neutrophil engraftment is defined as an ANC at or above 500/mm3 for three consecutive days, platelet engraftment somewhat later. Rising counts are encouraging, but immune reconstitution takes months to over a year, especially after allogeneic transplant on immunosuppression.

Graft-versus-host disease (GVHD) occurs only in allogeneic transplant, when donor immune cells attack recipient tissues:

Acute GVHD is staged by skin/liver/gut involvement and assigned an overall grade I-IV. Teach patients to report rash, new diarrhea, jaundice, dry/gritty eyes, oral sensitivity, skin tightening, cough, dyspnea, or reduced range of motion. Other complications: sinusoidal obstruction syndrome / veno-occlusive disease (VOD) (weight gain, right-upper-quadrant pain, jaundice, hepatomegaly), transplant-associated thrombotic microangiopathy (TA-TMA), idiopathic pneumonia syndrome, CMV and fungal reactivation, central line infection, relapse, infertility, endocrine dysfunction, bone loss, and secondary malignancy.

The RN trends and escalates rather than diagnoses.

Discharge and long-term teaching

Discharge readiness is practical. Key points:

• Report fever exactly as instructed; do not self-treat with antipyretics that mask fever.
• Avoid sick contacts; follow neutropenic-diet/food-safety and hand-hygiene instructions.
• Take immunosuppressants (calcineurin inhibitors) consistently; never stop abruptly.
• Report diarrhea, rash, jaundice, cough, dyspnea, bleeding, confusion, or decreased intake.
• Follow the revaccination schedule - transplant erases prior childhood immunity, so the series restarts roughly 6-12 months post-transplant per protocol.

Document symptom assessment, line status, intake/output, mucositis grade, transfusion response, education, caregiver participation, and barriers.

Supportive care during the nadir

Nursing care during cytopenia is protocol-driven. Neutropenic precautions include strict hand hygiene, often a private room with high-efficiency filtration, a low-microbial or neutropenic diet per policy, no fresh flowers or standing water, and screening of visitors for illness. Growth factors such as filgrastim may be ordered to speed neutrophil recovery; the nurse teaches that bone pain is a common, expected side effect.

Transfusion support is frequent: cellular blood products for transplant recipients are typically irradiated to prevent transfusion-associated GVHD and leukoreduced, and CMV-safe products are used for CMV-negative patients. Mucositis from conditioning is graded and managed with bland rinses, scheduled analgesia (often patient-controlled opioids), and parenteral nutrition when oral intake fails.

Common discharge teaching points include: report fever exactly as instructed and do not mask it with antipyretics; avoid crowds, sick contacts, gardening, and pet waste; follow food-safety rules; take immunosuppressants and antimicrobial prophylaxis on schedule; and return for the frequent labs and chimerism testing that track engraftment.

CAR T-cell therapy: a related cellular platform

The OCN exam increasingly references chimeric antigen receptor (CAR) T-cell therapy, an autologous cellular product engineered to target the malignancy. Its signature toxicities are distinct from transplant. Cytokine release syndrome (CRS) presents with fever, hypotension, hypoxia, and tachycardia, typically within the first days, and is treated with supportive care and the interleukin-6 blocker tocilizumab per protocol. Immune effector cell-associated neurotoxicity syndrome (ICANS) presents with confusion, aphasia, tremor, handwriting deterioration, and seizures, and is monitored with a standardized encephalopathy assessment.

Nurses perform frequent neuro and vital-sign checks and escalate fever or any new confusion immediately, since both syndromes can progress rapidly.

Counts recover before stamina, immunity, nutrition, fertility, employment, and emotional recovery, so survivorship teaching addresses fatigue, sexual health, secondary-cancer surveillance, bone density, and the long revaccination timeline. Vigilance over weeks to months, not a single day, defines transplant nursing.