Asplenia: Difference between revisions
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==[[Asplenia epidemiology and demographics|Epidemiology and Demographics]]== | ==[[Asplenia epidemiology and demographics|Epidemiology and Demographics]]== | ||
==[[Asplenia risk factors|Risk Factors]]== | ==[[Asplenia risk factors|Risk Factors]]== | ||
Revision as of 12:52, 19 July 2021
| Asplenia | |
| ICD-10 | D73.0, Q89.0 |
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| ICD-9 | 289.59, 759.01 |
| OMIM | 208530 %271400 208540 |
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Asplenia Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Asplenia On the Web |
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American Roentgen Ray Society Images of Asplenia |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief:
Synonyms and keywords:
Overview
Historical Perspective
Classification
Pathophysiology
Causes
Differentiating Asplenia from other Diseases
Epidemiology and Demographics
Risk Factors
Common Risk Factors
- Common risk factors in the development of asplenia include:
Less Common Risk Factors
- Less common risk factor include:
- mutations in the gene RPSA, is a risk factor for Isolated asplenia.[3]
- Two human genes, connexin 43 and ZIC3, is a risk factor for heterotaxy syndrome.[4]
Screening
screening for asplenia is by the detection of Howell-Jolly bodies (ie, erythrocytes with nuclear remnants) is recommended. [5]
Natural History, Complications and Prognosis
Natural History
- If left untreated, Patients with asplenia or hyposplenia are at risk of life-threatening infection.[6]
- Patients with functional asplenia and hyposplenia who have not undergone a splenectomy can present with a life-threatening infection comparable to an OPSI.
- Overwhelming post-splenectomy infection (OPSI) occurs in 5% of patients and has a mortality rate of 38%–70%.
- Functional asplenia is most common in sickle cell disease and occurs within the first 3-5 years of life.[7]
Complications
Common complications of asplenia include
- overwhelming post-splenectomy infection (OPSI)[6]
- Infection with encapsulated microorganisms such as Streptococcus pneumonia, Neisseria meningitides and Haemophilous influenzae
- Waterhouse-Friedrichsen syndrome and Purpura fulminans [8]
- Arterial thrombosis: includes coronary artery disease [7]
- Venous thrombosis: includes deep vein thrombosis, pulmonary embolism, splenic and portal vein thrombosis
- Pulmonary hypertension, associated with right ventricular dysfunction.
Less Common complications of asplenia include
- Patients with asplenia are also at risk for less common infections due to Capnocytophaga, Babesia, and malaria.[9]
Prognosis
- Prognosis of asplenia is poor, if asplenic patients are not diagnosed on time, and do not receive proper vaccination. These patients are at high risk of infection leads to sepsis, septic shock, and death.[6]
- Huebner and colleagues, in One case report provides evidence of the poor prognosis in asplenic patients who present with infection despite receiving standard medical care.[10]
- In Right isomerism (Ivemark syndrome) Prognosis is Poor, 80 % die within first year.[11]
Diagnosis
Diagnostic study of choice | History and Symptoms | Physical Examination | Laboratory Findings | Electrocardiogram | X-Ray Findings | Echocardiography and Ultrasound | CT-Scan Findings | MRI Findings | Other Imaging Findings | Other Diagnostic Studies
Treatment
Medical Therapy | Surgery | Interventions | Primary Prevention | Secondary Prevention | Cost-Effectiveness of Therapy | Future or Investigational Therapies
Medical Therapy
Emergency Medical Management of suspected sepsis in Asplenic patient
Asplenia can cause sepsis and require immediate management:[12]
- Children with asplenia for every febrile illness, must be seen by a physician immediately.
- Sepsis in individuals with asplenia or hyposplenia is a medical emergency as these patients can die within several hours of fever onset despite appearing well initially.
- Administration of antibiotic therapy should not be delayed and blood culture should be performed unless there is an obvious nonbacterial source.
- Ceftriaxone: 100 mg/kg/dose, (maximum 2 g/dose) should be given in all asplenic patients.
- Administer both ceftriaxone and vancomycin (60 mg/kg/day in divided doses every 6 h) in case of intermediate or high penicillin-resistant pneumococci.
- If the patient is treated in a clinic or office setting, refer immediately to the nearest emergency department.
- Clinical deterioration can be rapid even after antibiotic administratin so changes in antibiotics should be done after culture reports available.
- Vancomycin and ciprofloxacin can be used if the patient has an allergy to penicillin or cephalosporin. Changes in antibiotics should be done after culture reports available.
- According to the Surviving Sepsis Campaign guidelines, to avoid poor outcomes, patients suspected of sepsis should be started on antibiotics within 1 hour and as per standard sepsis guidelines, aggressive intravenous (IV) hydration should also be promptly initiated as a part of supportive care.[13]
- Also, asplenic patients are prone to developing septic shock, they may require vasopressors to maintain their blood pressure and if patients develop respiratory failure, mechanical ventilation may be necessary for certain circumstances.
Surgery
The mainstay of treatment for asplenia is medical therapy and prevention.[14]
Primary prevention
Vaccination
- Vaccination against these encapsulated bacteria is recommended to prevent asplenia patients from severe infection. Up to 87% of asplenic patients were found to have been infected with Streptococcus pneumoniae, one of the most common bacterial pathogen leading to infection in patients with asplenia.
- Vaccinations are also recommended before splenectomy and after the surgical removal. For those with functional asplenia or autosplenectomy, it is also advised to continue aggressive vaccination schedules. It is recommended that patients should be given the pneumococcal conjugate vaccine (PCV-13) 8 weeks in advance, as well as the pneumococcal polysaccharide vaccine (PPSV-23), Haemophilus influenzae type B vaccine (Hib), and the quadrivalent meningococcal conjugate vaccine 14 days before planned surgery for splenectomy.
- Apart from all these vaccines, patients should be encouraged to receive influenza vaccine, annual vaccination against the common strains of influenza.[10]
Antibiotic Prophylaxis
- Only Immunizations do not protect against infections with encapsulated bacteria, antibiotic prophylaxis Should be given.[12]
- For children
- All patients younger than five years of age should receive antibiotic prophylaxis.
- Birth to three months: Escherichia coli, Klebsiella are of concern in this age group.
- Amoxicillin or clavulanate 10 mg/kg/dose PO q12h, with penicillin VK 125 mg per dose PO q12h OR amoxicillin 10 mg/kg/dose q12h, as an alternative if not tolerated.
- more than 3 months to five years
- Penicillin VK 125 mg per dose PO q12h OR amoxicillin 10 mg/kg/dose PO q12h.
- Liquid amoxicillin tastes better and may be better tolerated than liquid penicillin.
- more than 5 years
- Penicillin V 250 mg or 300 mg per dose q12h OR amoxicillin 250 mg per dose q12h.
- For penicillin, 250 mg is a convenient dose for suspension but tablets are only available as 300 mg
- For children
- The infectious risk in asplenic patients is high during their entire life but it is highest during the first 2 years following splenectomy and the risk decreases over time.[15]
- Along with vaccination, antibiotic prophylaxis should be given.
- Long term prophylactic therapy oral antibiotic penicillin V, or erythromycin in case of allergy, is required for at least 2 years after splenectomy to cover the period during which the infectious risk is highest.
Malaria Prophylaxis
- Asplenic and hyposplenic children must be advised of their increased risk of severe malaria and also take malaria prophylaxis as appropriate for their age and the type of malaria found in the area to which they are travelling and they should always seek travel advice.[16]
Secondary prevention
Effective measures for the secondary prevention of asplenia include:
- Patient should carry an alert card or bracelet and an up-to-date vaccination record.[17]
- Adult with asplenia, if unable to seek medical attention within 2 hours, should have access to preprescribed antibiotics which should be taken at fever onset.
- The risk of infection can be significantly reduced by using systematic, long-term approaches to care for asplenic patients.
- Patient and family education program that addresses the risk of infection in these at-risk patients.[9]
Case Studies
Template:Hematology Template:Phakomatoses and other congenital malformations not elsewhere classified
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- ↑ Erdem SB, Genel F, Erdur B, Ozbek E, Gulez N, Mese T (2015). "Asplenia in children with congenital heart disease as a cause of poor outcome". Cent Eur J Immunol. 40 (2): 266–9. doi:10.5114/ceji.2015.52841. PMC 4637402. PMID 26557043.
- ↑ Browning MG, Bullen N, Nokes T, Tucker K, Coleman M (2017). "The evolving indications for splenectomy". Br J Haematol. 177 (2): 321–324. doi:10.1111/bjh.14060. PMID 27018168.
- ↑ Bolze A (2014). "[Connecting isolated congenital asplenia to the ribosome]". Biol Aujourdhui. 208 (4): 289–98. doi:10.1051/jbio/2015001. PMID 25840456.
- ↑ Ahmed SA, Zengeya S, Kini U, Pollard AJ (2010). "Familial isolated congenital asplenia: case report and literature review". Eur J Pediatr. 169 (3): 315–8. doi:10.1007/s00431-009-1030-0. PMID 19618213.
- ↑ Corazza GR, Ginaldi L, Zoli G, Frisoni M, Lalli G, Gasbarrini G; et al. (1990). "Howell-Jolly body counting as a measure of splenic function. A reassessment". Clin Lab Haematol. 12 (3): 269–75. doi:10.1111/j.1365-2257.1990.tb00037.x. PMID 2125541.
- ↑ 6.0 6.1 6.2 Kirkineska L, Perifanis V, Vasiliadis T (2014). "Functional hyposplenism". Hippokratia. 18 (1): 7–11. PMC 4103047. PMID 25125944.
- ↑ 7.0 7.1 Long B, Koyfman A, Gottlieb M (2021). "Complications in the adult asplenic patient: A review for the emergency clinician". Am J Emerg Med. 44: 452–457. doi:10.1016/j.ajem.2020.03.049. PMID 32247651 Check
|pmid=value (help). - ↑ Hale AJ, LaSalvia M, Kirby JE, Kimball A, Baden R (2016). "Fatal purpura fulminans and Waterhouse-Friderichsen syndrome from fulminant Streptococcus pneumoniae sepsis in an asplenic young adult". IDCases. 6: 1–4. doi:10.1016/j.idcr.2016.08.004. PMC 4995527. PMID 27583208.
- ↑ 9.0 9.1 Lee GM (2020). "Preventing infections in children and adults with asplenia". Hematology Am Soc Hematol Educ Program. 2020 (1): 328–335. doi:10.1182/hematology.2020000117. PMC 7727556 Check
|pmc=value (help). PMID 33275684 Check|pmid=value (help). - ↑ 10.0 10.1 Huebner ML, Milota KA (2015). "Asplenia and fever". Proc (Bayl Univ Med Cent). 28 (3): 340–1. doi:10.1080/08998280.2015.11929267. PMC 4462215. PMID 26130882.
- ↑ Agarwal H, Mittal SK, Kulkarni CD, Verma AK, Srivastava SK (2011). "Right isomerism with complex cardiac anomalies presenting with dysphagia--a case report". J Radiol Case Rep. 5 (4): 1–9. doi:10.3941/jrcr.v5i4.702. PMC 3303439. PMID 22470785.
- ↑ 12.0 12.1 Salvadori MI, Price VE, Canadian Paediatric Society, Infectious Diseases and Immunization Committee (2014). "Preventing and treating infections in children with asplenia or hyposplenia". Paediatr Child Health. 19 (5): 271–8. PMC 4029242. PMID 24855431.
- ↑ Rhodes A, Evans LE, Alhazzani W, Levy MM, Antonelli M, Ferrer R; et al. (2017). "Surviving Sepsis Campaign: International Guidelines for Management of Sepsis and Septic Shock: 2016". Intensive Care Med. 43 (3): 304–377. doi:10.1007/s00134-017-4683-6. PMID 28101605.
- ↑ Waghorn DJ (2001). "Overwhelming infection in asplenic patients: current best practice preventive measures are not being followed". J Clin Pathol. 54 (3): 214–8. doi:10.1136/jcp.54.3.214. PMC 1731383. PMID 11253134.
- ↑ Quéffélec C, Billet L, Duffau P, Lazaro E, Machelart I, Greib C; et al. (2020). "Prevention of infection in asplenic adult patients by general practitioners in France between 2013 and 2016 : Care for the asplenic patient in general practice". BMC Fam Pract. 21 (1): 163. doi:10.1186/s12875-020-01237-3. PMC 7425533 Check
|pmc=value (help). PMID 32787857 Check|pmid=value (help). - ↑ Committee to Advise on Tropical Medicine and Travel (CATMAT) (2009). "Canadian recommendations for the prevention and treatment of malaria among international travellers--2009". Can Commun Dis Rep. 35 Suppl 1: 1–82. PMID 19750611.
- ↑ O'Neill NE, Baker J, Ward R, Johnson C, Taggart L, Sholzberg M (2020). "The development of a quality improvement project to improve infection prevention and management in patients with asplenia or hyposplenia". BMJ Open Qual. 9 (3). doi:10.1136/bmjoq-2019-000770. PMC 7410002 Check
|pmc=value (help). PMID 32759171 Check|pmid=value (help).