Prevention of post-splenectomy sepsis in patients with asplenia - a study protocol of a controlled trial

Prevention and treatment of infection in patients with an absent or hypofunctional spleen: A British Society for Haematology guideline

Guidelines for the prevention and treatment of infection in patients with an absent or dysfunctional spleen were published by the British Committee for Standards in Haematology in 1996 and updated in 2002 and 2011. With advances in vaccinations and changes in patterns of infection, the guidelines required updating. Key aspects included in this guideline are the identification of patients at risk of infection, patient education and information and immunisation schedules. This guideline does not address the non-infective complications of splenectomy or functional hyposplenism (FH). This replaces previous guidelines and significantly revises the recommendations related to immunisation. Patients at risk include those who have undergone surgical removal of the spleen, including partial splenectomy and splenic embolisation, and those with medical conditions that predispose to FH. Immunisations should include those against Streptococcus pneumoniae (pneumococcus), Neisseria meningitidis (meningococcus) and influenza. Haemophilus influenzae type b (Hib) is part of the infant immunisation schedule and is no longer required for older hyposplenic patients. Treatment of suspected or proven infections should be based on local protocols and consider relevant anti-microbial resistance patterns. The education of patients and their medical practitioners is essential, particularly in relation to the risk of serious infection and its prevention. Further research is required to establish the effectiveness of vaccinations in hyposplenic patients; infective episodes should be regularly audited. There is no single group ideally placed to conduct audits into complications arising from hyposplenism, highlighting a need for a national registry, as has proved very successful in Australia or alternatively, the establishment of appropriate multidisciplinary networks.

Fate of small remnant pancreatic tail in splenic hilum after laparoscopic spleen preserving distal pancreatectomy: a retrospective study

Purpose

When performing laparoscopic spleen-preserving distal pancreatectomy (LSPDP), sometimes, anatomically challenging patients are encountered, where the pancreatic tail is deep in the splenic hilum. The purpose of this study was to discuss the experience with the surgical technique of leaving the deep pancreatic tail of the splenic hilum in these patients.

Methods

Eleven patients who underwent LSPDP with remnant pancreatic tails between November 2019 and August 2021 at Samsung Medical Center in Seoul, Korea were included in the study. Their short-term postoperative outcomes were analyzed retrospectively.

Results

The mean operative time was 168.6 ± 26.0 minutes, the estimated blood loss was 172.7 ± 95.8 mL, and the postoperative length of stay was 6.1 ± 1.0 days. All 11 lesions were in the body or tail of the pancreas and included 2 intraductal papillary mucinous neoplasms, 6 neuroendocrine tumors, 2 cystic neoplasms, and 1 patient with chronic pancreatitis. In 10 of the 11 patients, only the pancreatic tail was left inside the distal portion of the splenic hilum of the branching splenic vessel, and there was a collection of intraabdominal fluid, which was naturally resolved. One patient with a remnant pancreatic tail above the hilar vessels was readmitted due to a postoperative pancreatic fistula with fever and underwent internal drainage.

Conclusion

In spleen preservation, leaving a small pancreatic tail inside the splenic hilum is feasible and more beneficial to the patient than performing splenectomy in anatomically challenging patients.

Efficacy of a novel patient-focused intervention aimed at increasing adherence to guideline-based preventive measures in asplenic patients: the PrePSS trial

PURPOSE

To determine whether a novel intervention improves the adherence to guideline-based preventive measures in asplenic patients at risk of post-splenectomy sepsis (PSS).

METHODS

We used a prospective controlled, two-armed historical control group design to compare a novel, health action process approach (HAPA)-based telephonic intervention involving both patients and their general practitioners to usual care. Eligible patients were identified in cooperation with the insurance provider AOK Baden-Wuerttemberg, Germany. Patients with anatomic asplenia (n = 106) were prospectively enrolled and compared to a historical control group (n = 113). Comparisons were done using a propensity-score-based overlap-weighting model. Adherence to preventive measures was quantified by the study-specific 'Preventing PSS score' (PrePSS score) which includes pneumococcal and meningococcal vaccination status, the availability of a stand-by antibiotic and a medical alert card.

RESULTS

At six months after the intervention, we estimated an effect of 3.96 (95% CI 3.68-4.24) points on the PrePSS score scale (range 0-10) with mean PrePSS scores of 3.73 and 7.70 in control and intervention group, respectively. Substantial improvement was seen in all subcategories of the PrePSS score with the highest absolute gains in the availability of stand-by antibiotics. We graded the degree of participation by the general practitioner (no contact, short contact, full intervention) and noted that the observed effect was only marginally influenced by the degree of physician participation.

CONCLUSIONS

Patients who had received the intervention exhibited a significantly higher adherence to guideline-based preventive measures compared to the control group. These data suggest that widespread adoption of this pragmatic intervention may improve management of asplenic patients. Health insurance provider-initiated identification of at-risk patients combined with a patient-focused intervention may serve as a blueprint for a wide range of other preventive efforts leading to patient empowerment and ultimately to better adherence to standards of care.

Effects of a health psychology-based intervention for patients with asplenia on psychological determinants of preventive behaviour: A propensity score analysis

OBJECTIVE

Patients with asplenia have an increased lifelong risk of severe infections especially post splenectomy sepsis with hospital mortality rates of 30-50%. Adherence to existing guidelines for preventive measures is low. Objective of the study is the evaluation of a novel intervention to increase health psychological outcomes in patients with asplenia resulting in better adherence to preventive measures.

METHODS

The intervention was evaluated by conducting a prospective, two-armed historical control group design via propensity score analysis. Focus are health-psychological outcomes: self-efficacy, intention, risk perception, behaviour planning, self-management, health literacy, patient involvement and disease-knowledge.

RESULTS

Patients in the intervention group (N = 110) showed a higher increase in almost all outcomes compared to a historical control group (N = 115). The strongest increase was observed in "asplenia-specific self-management" (average treatment effect: ATE 1.14 [95% CI 0.91-1.36] p < .001) and "asplenia-specific health-literacy" (ATE 1.42 [95% CI 1.18-1.65] p < .001). Significant intervention effects were also found in behaviour planning, perceived involvement and disease-knowledge.

CONCLUSION

The patient-focused intervention is effective in improving health-psychological outcomes in patients with asplenia.

PRACTICE IMPLICATIONS

The implementation of the intervention can make an important contribution to care and lead to an improvement of health-psychological outcomes that may result in a higher adherence to prevention measures.