How long must transplant recipients take immunosuppression?

The correct answer is Lifelong.

Hematological & Oncology · Topic 9 of 16

Organ Transplant Rejection & Immunosuppression

Q: Which rejection type occurs within minutes to hours and requires removing the organ?

The correct answer is Hyperacute.

A transplant recipient spikes a fever on post-op day 5 — is this infection or the body attacking its new organ?

Your levelNot startedAnswer a card to start

Start here

Loading…

Tap to start15 cards · about 6 min · +45 XP

Pathophysiology & Risk Factors

Rejection occurs when the recipient's immune system recognizes donor tissue as foreign and attacks it. Three types are classified by timeline, mechanism, and reversibility: hyperacute (preformed antibodies, minutes to hours, remove the organ), acute (T-cell mediated, days to months, often reversible), and chronic (gradual fibrosis and vascular change, months to years, irreversible). Acute rejection is the most common and most testable type.

Rejection types by timeline, mechanism, and reversibility

HyperacuteAcuteChronic

TimingMinutes to hoursDays to monthsMonths to years

MechanismPreformed antibodiesT-cell mediatedFibrosis & vascular change

Reversible?No — remove organOften yes — treat itNo — graft slowly fails

Hyperacute

Timing: Minutes to hours
Mechanism: Preformed antibodies
Reversible?: No — remove organ

Acute

Timing: Days to months
Mechanism: T-cell mediated
Reversible?: Often yes — treat it

Chronic

Timing: Months to years
Mechanism: Fibrosis & vascular change
Reversible?: No — graft slowly fails

Signs & Symptoms

EarlyProgresses →

cyanotic graft

hyperacute, in the OR

fever Hallmark

acute rejection; may be blunted by immunosuppression

graft site tenderness Hallmark

malaise

decreased urine output

kidney graft

peripheral edema

fluid retention from falling GFR

rapid weight gain

e.g. 2 kg over days

new-onset arrhythmia

heart graft acute rejection

Late / Severe

progressive graft failure

chronic rejection, insidious

Diagnostics & Labs

Diagnostic

rising serum creatinine Hallmark

kidney graft acute rejection

elevated liver enzymes

liver graft dysfunction

decreased ejection fraction

heart graft dysfunction

graft biopsy

definitive; fibrosis seen in chronic rejection

Monitor

tacrolimus trough level

target ranges vary by organ and time post-transplant

Interventions & Priorities

notify provider of rejection signs

fever, graft tenderness, rising organ labs

bring patient in for same-day evaluation

new infectious symptoms in immunosuppressed patient

reinforce immunosuppressant adherence

never skip or self-adjust doses

monitor organ-specific function labs

draw tacrolimus trough before next dose

Treatments & Medications

high-dose corticosteroids

first-line for acute rejection

antithymocyte globulin

for acute rejection escalation

tacrolimus

calcineurin inhibitor; lifelong maintenance

mycophenolate

prednisone

Patient Teaching

lifelong immunosuppression Hallmark

non-negotiable; never stop on stable labs

report any fever immediately

blunted response can mask serious infection

avoid live vaccines

absolutely contraindicated while immunosuppressed

avoid grapefruit juice

inhibits CYP3A4, raises calcineurin inhibitor levels

eat only cooked meats and pasteurized dairy

moderate outdoor exercise allowed

low-crowd settings are safe

Complications

opportunistic infection

leading cause of death in first year

sepsis

mild cold can progress rapidly

graft loss

from untreated or chronic rejection

calcineurin inhibitor nephrotoxicity

tacrolimus toxicity

skin cancer

long-term immunosuppression risk

Report Nowescalate immediately

cyanotic graft after transplant Hallmark

hyperacute rejection — remove organ immediately

fever in transplant recipient

rejection or rapidly progressing infection

graft site tenderness

rising creatinine with decreased urine output

acute kidney graft rejection — rising creatinine plus falling urine output

new arrhythmia with weight gain post heart transplant

acute cardiac rejection with graft dysfunction; most rejection is silent until biopsy

Clinical Pearl

Think timeline: minutes = hyperacute (remove it), months = acute (treat it), years = chronic (lose it). Acute is the one you can actually fix.

Organ Transplant Rejection & Immunosuppression

A transplant recipient spikes a fever on post-op day 5 — is this infection or the body attacking its new organ? The timeline tells you everything.

Transplant rejection occurs when the recipient's immune system recognizes donor tissue as foreign and mounts an attack. Three types are classified by timeline and mechanism. Hyperacute rejection happens within minutes to hours of transplant due to preformed antibodies — the organ turns cyanotic and must be removed immediately. This is rare today because of crossmatching. Acute rejection is the most common and most testable type, occurring days to months post-transplant (typically within the first 3-6 months). It presents with organ-specific dysfunction: rising creatinine in kidney transplants, elevated liver enzymes in liver transplants, decreased ejection fraction in heart transplants. Fever, tenderness over the graft site, and malaise are classic signs. Acute rejection is most often T-cell mediated (acute cellular rejection) and often reversible with increased immunosuppression (high-dose corticosteroids, antithymocyte globulin). Chronic rejection develops over months to years, involves gradual fibrosis and vascular changes, and is irreversible — the organ slowly fails despite immunosuppression. Nursing priorities center on monitoring for rejection signs, ensuring immunosuppressant adherence (tacrolimus trough levels vary by organ and time post-transplant — verify institution-specific target ranges), and teaching the patient that lifelong immunosuppression is non-negotiable. Any fever, graft tenderness, or sudden change in organ function labs warrants immediate provider notification.

Key Distinctions

Don't confuse acute rejection (reversible with treatment escalation) with chronic rejection (irreversible, gradual organ failure). Students mix up hyperacute rejection (antibody-mediated, minutes) with acute rejection (T-cell mediated, days to months). Rejection symptoms mimic infection — both cause fever — but rejection adds organ-specific lab changes and graft tenderness, while infection typically shows a localizable source and elevated WBC with left shift.

Clinical Pearl

Think timeline: minutes = hyperacute (remove it), months = acute (treat it), years = chronic (lose it). Acute is the one you can actually fix.

Knowledge Check

3 quick questions on the must-knows for this topic.

Question 1 of 3

Which rejection type occurs within minutes to hours and requires removing the organ?

Ready to practice this topic?

Get a personalized study plan built around this topic — free to try, no card needed.

Get practice questions on this

Pathophysiology & Risk Factors

Signs & Symptoms

Diagnostics & Labs

Interventions & Priorities

Treatments & Medications

Patient Teaching

Complications

Organ Transplant Rejection & Immunosuppression

A transplant recipient spikes a fever on post-op day 5 — is this infection or the body attacking its new organ? The timeline tells you everything.

Key Distinctions

Clinical Pearl

Knowledge Check

Go further

Ready to practice this topic?