Diagnosis of Infection after Splenectomy for Trauma Should Be Based on Lack of Platelets Rather Than White Blood Cell Count

Acute and chronic hematologic implications of emergency and elective splenectomy

INTRODUCTION

Thrombocytosis and leukocytosis are common after splenectomy. The potential effect of emergency surgery on these postoperative findings is unknown. We hypothesized that emergency splenectomy leads to a more profound and persistent hematologic change as compared to elective splenectomy.

METHODS

A retrospective review was conducted of patients who underwent elective or trauma splenectomy. Records were queried for platelet (PLT) and white blood cell (WBC) count prior to splenectomy, on postoperative days 1-5, and at day 14, 1 month, 3 months, 6 months, and 1 year. Complications, including thromboembolic events, infection, need for repeat operation, and readmission within 30 days of discharge, were recorded.

RESULTS

463 patients were identified as being eligible for the study, with 173 patients in the elective cohort and 145 patients in each of the isolated trauma splenectomy and polytrauma cohorts. Both cohorts had peak thrombocytosis at week 2 postoperatively. However, polytrauma patients had a significantly higher peak platelet count (P < 0.01). The PLT:WBC ratio was lower in both trauma cohorts pre-operatively and postoperative day 1. Trauma splenectomy had a higher PLT:WBC ratio on days 2 and 3 whereas polytrauma had a lower ratio on days 4 and 5. Emergency cases had greater reoperation and infection rates, whereas elective cases were more likely to require readmission. Postoperative thromboembolic events were only higher in the polytrauma cohort.

CONCLUSIONS

While trauma splenectomy resulted in more profound postoperative leukocytosis and thrombocytosis, there was no correlation with timing of infection or risk of thromboembolic events. These findings suggest that thrombocytosis and leukocytosis may be associated with thrombotic and infectious events but their presence alone does not indicate direct risks of concomitant infection or thrombosis.

Hematologic changes after splenectomy for ovarian cancer debulking surgery, and association with infection and venous thromboembolism

INTRODUCTION

The spleen plays a role in the immune and coagulative responses, yet a splenectomy may be required during ovarian cancer surgery to achieve complete cytoreduction. The aim of the study was to correlate hematologic changes with the development of infection and venous thromboembolism in patients undergoing splenectomy.

METHODS

This single-institution retrospective review includes all patients undergoing splenectomy during cytoreductive surgery for advanced ovarian cancer, March 2001 to December 2016. We compared postoperative hematologic changes (evaluated daily before discharge) in patients developing infection within 30 days' post-surgery (Infection group) with those who did not (No-Infection group). We also compared patients developing venous thromboembolism with those without.

RESULTS

A total of 265 patients underwent splenectomy. Median age was 64 years (range 22-88): 146 (55%) patients had stage IIIC and 114 (43%) patients had stage IV. The majority, 201 (76%) patients underwent splenectomy during primary debulking. A total of 132 (50%) patients comprised the Infection group (most common: urinary tract infection, 54%). Median time from surgery to infection was 8 days (range, 0-29). After initial rise in white blood cell count in both groups, the Infection group had a second peak on postoperative day 10 (median 16.6K/mcL, IQR 12.5-21.2) not seen in the No-Infection group (median 12K/mcL, IQR 9.3-16.3). A total of 40 (15%) patients developed venous thromboembolism, median time of 6.5 days (range, 1-43). All patients demonstrated a continuous rise in platelets during postoperative days 0-15. Thrombocytosis was present in 38/40 (95%) patients with venous thromboembolism vs 183/225 (81%) patients without (P=0.036). Median days with thrombocytosis was higher in venous thromboembolism (8 days, range 1-15) vs non groups (6 days, range 1-16, P=0.049).

CONCLUSION

We identified initial leukocytosis after splenectomy in all patients. The Infection group had a second peak in white blood cell count on postoperative day 10, not present in the No-Infection group. Among patients with venous thromboembolism, thrombocytosis was more frequent and of longer duration.

After the embo: predicting non-hemorrhagic indications for splenectomy after angioembolization in patients with blunt trauma

Background

Successful non-operative management (NOM) of blunt splenic trauma is enhanced with splenic angioembolization (SAE). Patients may still require splenectomy post-SAE for splenic infarction/necrosis. Prior studies have used white blood cell count (WBC), platelet count (PLT), and PLT:WBC ratio after splenectomy to predict complications, but none have evaluated these findings prior to splenectomy in patients who have undergone SAE. Changes in these values may indicate clinically significant splenic infarction, facilitating management of these patients.

Methods

Patients admitted to an American College of Surgeons verified level 1 trauma center from January 2007 to August 2017 who underwent SAE were identified. Patients with successful NOM after SAE (SAE/NOM) were compared with those requiring splenectomy (SAE/SPLEN). Data included demographics, splenic injury grade, Injury Severity Score (ISS), time to SAE and splenectomy, intensive care unit and hospital length of stay (LOS), and complete blood count. Lab values were analyzed immediately post-SAE (time 1) and day 5 post-SAE (or day of discharge) for SAE/NOM patients and day of SPLEN for SAE/SPLEN patients (time 2). Data were analyzed using Mann-Whitney U, χ² tests, and receiver operating characteristic (ROC) curves with significance attributed to P<0.05.

Results

Of 124 patients undergoing SAE, 16 (13%) later required SPLEN for infarction/necrosis at a median of 5 days post-SAE (IQR: 3–10 days). SAE/SPLEN and SAE/NOM patients did not differ by age, gender, ISS, or grade of splenic injury. SAE/SPLEN patients had longer hospital LOS (23 vs. 10 days, P<0.001). WBC, PLT, and PLT:WBC ratio did not differ between the groups at time 1. At time 2, WBC was higher and PLT:WBC ratio was lower in SAE/SPLEN patients. Using ROC curves at time 2, the area under the curve was 0.90 (P<0.001) for WBC and 0.71 (P<0.007) for PLT:WBC ratio.

Discussion

Patients requiring splenectomy for clinically significant infarction/necrosis after SAE develop leukocytosis and decreased PLT:WBC ratio when compared with SAE/NOM patients. Monitoring these parameters allows more prompt diagnosis and operative intervention.

Level of evidence

Therapeutic/care management, level III.

Persistent changes in circulating white blood cell populations after splenectomy

The effect of splenectomy on the incidence of infections and thromboembolisms has been investigated thoroughly. Nevertheless, the long-term effects of splenectomy on immunological profile and circulating blood counts have not been described before. To study such long-term effects, we analysed several parameters in splenectomised trauma patients and compared the results of this group ("otherwise healthy patients") to patients with a specific underlying disease. We measured platelet count, leukocytes and differential, lymphocyte subsets, serum levels of immunoglobulins, and complement pathways in 113 patients. Indications to perform a splenectomy were trauma (n = 42), Hodgkin lymphoma (n = 24), hereditary spherocytosis (n = 21), and immune thrombocytopenia (n = 26). In trauma patients lymphocytes and lymphocytes subsets were particularly elevated compared to normal population values. Splenectomised patients with Hodgkin lymphoma had significant lower numbers of T lymphocytes than trauma patients. Significant increases in platelets, leukocytes, and monocytes were observed in patients with hereditary spherocytosis. Occurrence of MBL genotype was different in ITP patients than in other splenectomised groups and the normal population. In splenectomised patients (> 4 years), platelet counts and lymphocyte subsets are increased which persist over time. As a result, these blood counts in splenectomised patients differ from reference values in the normal population.

Relationship between blood lactic acid, blood procalcitonin, C-reactive protein and neonatal sepsis and corresponding prognostic significance in sick children

The study was conducted to evaluate the relationship between the blood lactic acid (BLA) level, serum procalcitonin (PCT), C-reactive protein (CRP) and the severity and prognosis of neonatal sepsis. A retrospective analysis was conducted on 90 children with sepsis admitted into the Intensive Care Unit (ICU) of the Hubei Institute for Nationalities Af liated Hospital hospital. Patients were divided into the non-survival group and the survival group. Severity of the 90 patients was evaluated according to Neonatal Critical Illness Score (NCIS). Observations were made on changes of the levels of BLA, PCT and CRP, correlation between BLA, PCT, CRP and NCIS as well as the association of the levels of these proteins with the prognosis of the patients. The 90 sick children were divided into the survival group (61 cases, 67.7%) and the non-survival group (29 cases, 32.2%). They were further stratified into the extremely severe group (n=20), severe group (n=39) and non-severe group (n=31) according to NCIS scoring standard. The BLA and NCIS scores of the non-survival group were significantly greater than those of the survival group. The difference was statistically significant (P<0.05). We found that there was a significant negative correlation between the BLA values and NCIS scores of the two groups. We also demonstrated significant positive correlation between the BLA value, PCT and CR (P<0.05). We observed a significant negative correlation between PCT, CRP and NCIS scores (P<0.05). The PCT level of the non-survival group was significantly higher than that of the survival group (P<0.05), while the NCIS score was significantly lower than that of the survival group (P<0.05). The CRP and PCT protein expression results of the sepsis patients were higher than those of the control group. Therefore, there is a significant correlation between BLA, CRP, PCT and NCIS. The lower the NCIS score is, the more significant the increase of BLA, PCT and CRP. Thus, the combined detection of levels of BLA, PCT and CRP may predict the severity of neonatal sepsis patients and their prognosis.

Leukocytosis and Leukemia

Leukocytosis is among the most common findings on peripheral blood smear. A wide range of causes may mediate this finding, and careful clinical and laboratory evaluation assist in differentiating between benign and malignant causes of increased white blood cell counts. In this article, various nonmalignant causes are explored, including infectious, inflammatory, autoimmune, and allergic. In addition, malignant causes of leukocytosis are discussed, including myeloproliferative disorders, acute leukemia, and chronic leukemia, as well as treatment and monitoring for patients with these diseases.