Vaccination of Pre splenectomy in elective pt
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pre-splenectomy vaccination guidelines elective surgery 2024
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Pre-Splenectomy Vaccination in Elective Patients
Why Vaccination is Mandatory
After splenectomy, the patient loses the spleen's critical role in clearing encapsulated bacteria from the bloodstream. This creates a lifelong risk of Overwhelming Post-Splenectomy Infection (OPSI) - a rapidly fatal sepsis syndrome with historical mortality up to two-thirds of affected patients. OPSI incidence is 0.5% but carries 50% mortality. A 2014 Swedish study of >20,000 splenectomized patients found a ~6-fold higher risk of sepsis versus the general population.
"Vaccination of the splenectomized patient remains the most effective prevention strategy against OPSI. Preoperative vaccination before elective splenectomy is most prudent."
- Schwartz's Principles of Surgery, 11th Ed.
Timing - The Critical Rule
| Scenario | Timing |
|---|---|
| Elective splenectomy | Ideally 4-6 weeks before surgery; minimum 14 days before |
| Emergency/trauma splenectomy | Give vaccines ≥14 days after surgery (or at discharge) |
| Functional asplenia | Vaccinate as soon as diagnosed |
| Chemotherapy or radiotherapy also planned | Vaccinate ≥2 weeks before treatment, or ≥3 months after |
- Why 2 weeks? Adequate antibody response requires ~14 days to develop after vaccination.
- Why prefer 4-6 weeks? Some evidence shows vaccination is less effective if given in the 2 weeks immediately before or after splenectomy, when surgical stress may blunt the immune response.
- Antibody levels post-splenectomy vaccination are less than 50% of those achieved when vaccination is given with an intact spleen - reinforcing the importance of pre-operative timing. (Bailey & Love's Short Practice of Surgery, 28th Ed.)
Required Vaccines
1. Pneumococcal (Most Important - against S. pneumoniae)
| Patient | Regimen |
|---|---|
| Adults (immunologically naive) | PCV13 (Prevnar 13) → then PPSV23 (Pneumovax 23) at ≥8 weeks later |
| OR if using newer conjugates | PCV20 alone (single dose, no PPSV23 follow-up needed) |
| Revaccination | Repeat PPSV23 every 5 years; again at age 65 |
| Children 2-6 years | PCV13 → PCV13 (8 weeks) → PPSV23 (8 weeks) → repeat PPSV23 at 5 years |
| Children 6-18 years | PCV13 → PPSV23 (8 weeks) → repeat PPSV23 at 5 years |
2. Meningococcal (against N. meningitidis)
- MenACWY (quadrivalent conjugate - MenQuadfi / Menveo / Nimenrix): 2 doses, ≥8 weeks apart
- Revaccinate every 5 years
- MenB (serogroup B - Bexsero): 2 doses, ≥1 month apart
- No current revaccination recommendation
Give the first dose of MenACWY preoperatively; the second dose post-discharge at the appropriate interval.
3. Haemophilus influenzae type b (Hib)
- Single dose (PedVaxHib or ActHib)
- Indicated if age ≥15 months and not previously vaccinated
- No booster required
4. Influenza (Seasonal)
- Annual influenza vaccination recommended for all asplenic patients (reduces risk of secondary bacterial infection following influenza)
5. Additional Vaccines (CDC Recommendation)
- Tdap (tetanus, diphtheria, pertussis) - at least 2 weeks before elective surgery
- MMR (measles, mumps, rubella)
- Varicella
CDC Summary Table (from Sabiston Textbook of Surgery, 21st Ed.)
| Group | Pneumococcal | Meningococcal | Hib |
|---|---|---|---|
| Children (2-6 yrs) | PCV13 x2 → PPSV23 → repeat PPSV23 at 5 yrs | MenACWY series + MenB series | Hib x1 (if not previously vaccinated) |
| Children (6-18 yrs) | PCV13 → PPSV23 → repeat at 5 yrs | MenACWY series + MenB series | Hib x1 |
| Adults ≥19 yrs | PCV13 → PPSV23 → repeat every 5 yrs | MenACWY x2 (2 months apart, repeat every 5 yrs) + MenB series | Hib x1 |
First vaccination should be at least 2 weeks before elective splenectomy.
Antibiotic Prophylaxis (Adjunct to Vaccination)
Even with complete vaccination, oral antibiotic prophylaxis should be considered for:
- All children under 2 years
- High-risk post-splenectomy patients (hematologic malignancy, thalassemia, sickle cell disease)
- Common regimens: Penicillin V or amoxicillin
Patient Education Points
- Counsel patients that vaccines are not 100% protective - OPSI can still occur even after vaccination
- Provide a vaccination card for lifelong tracking
- Advise early emergency presentation or empiric antibiotics at first sign of fever
- Warn about animal bites - OPSI from Capnocytophaga canimorsus can result from dog or cat bites
- Warn about travel risks from organisms endemic in certain regions
- Poor retention of OPSI risk information is documented - repeat counseling is essential
Key Summary Box (Bailey & Love)
- Remember preoperative immunisation
- Prophylactic antibiotics in children and immunocompromised adults
- Opportunistic postsplenectomy infection is a real clinical danger
- Splenic conservation should be considered wherever possible
Sources: Sabiston Textbook of Surgery 21e, Schwartz's Principles of Surgery 11e, Fischer's Mastery of Surgery 8e, Mulholland & Greenfield's Surgery 7e, Bailey & Love's Short Practice of Surgery 28e; CDC Altered Immunocompetence Guidelines; NHS Grampian Splenectomy Vaccination Guidance
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