Coil Embolization of the Splenic Artery: Impact on Splenic Volume

Long-Term Effects of Proximal Splenic Artery Embolization on Splenic Volume and Platelet Count

BACKGROUND

The spleen is the most commonly injured visceral organ in blunt abdominal trauma. Post-splenectomy infection risk has led to the shift toward spleen preserving procedures and splenic artery embolization (SAE) is now the treatment of choice for hemodynamically stable patients with splenic injury. This study aims to assess the long-term effect of SAE on splenic volume and platelet count.

MATERIALS AND METHODS

Using CPT codes, 66 patients who underwent SAE were identified, and 14 of those who had the necessary imaging and laboratory follow-up were included in the study. Indications for SAE were portal hypertension in 8 patients, bleeding in 4 patients, and thrombocytopenia in 1, and one patient had a separate indication. Splenic volume was calculated by automated volumetric software (Aquarius, TeraRecon, Inc.). Paired t-tests were performed to compare splenic volume and platelets before and after SAE.

RESULTS

Fourteen patients (7 males, 7 females) with a mean age of 51 ± 11.95 years underwent SAE and were followed by a repeat computed tomography scan at an average of 733.57 days. Nine SAEs were performed using vascular plugs, 3 using micro coils, and 2 out of that were with Gelfoam slurry, and 2 using coils only. All embolizations were technically successful with complete cessation of flow. Mean splenic volumes pre- and post-SAE were 903.5 ± 523.73 cm³ and 746.5 ± 511.95 cm³, respectively, representing a mean decrease of 8.31% compared to baseline [P = 0.346]. Minimum platelet counts (x10³) pre-SAE (within 3 months) and post-SAE (2 weeks to 3 months after the procedure) were 55.79 ± 57.11 and 116 ± 145.40, respectively. The minimum platelet count showed a statistically significant mean increase of 134.92% (P = 0.033).

CONCLUSIONS

The splenic volume is not altered significantly by SAE in the long term. Similarly, the platelet count is also not significantly altered at 3 months follow-up. This study, although small, suggests that SAE is a safe intervention that can preserve splenic volume and function in the long term.

A retrospective multi-centre study of splenic volumes measured by CT following splenic artery angioembolisation for high-grade blunt splenic injuries in adults

INTRODUCTION

Splenic artery embolisation is a recognised modality in the management of high grade blunt splenic injury. The impact of embolisation on the spleen in terms of volume and function remains unclear. This results in a lack of clarity regarding post embolisation vaccination policy.

METHODS

This was a two-centre, retrospective observational study over a 24-month period involving all patients who underwent splenic artery embolisation for high grade blunt splenic trauma (AAST grades III-V). Splenic volumes were calculated from an initial CT and a repeat CT at 6 months post embolisation. Subgroup analysis was performed analysing the location of embolisation, AAST grading, and evidence of splenic dysfunction as defined by the presence of altered red cell morphology.

RESULTS

Thirty patients achieved successful splenic salvage with angioembolisation. Mean volume loss was 44.14 cm³ (P = 0.038), with decreased volumes for distal embolisation and increased volumes for proximal embolisation. Three patients had altered red cell morphology; two demonstrated recovery at 6 months, with the third lost to follow up. There were significant associations between, initial splenic volume, AAST grade of injury, and altered red cell morphology. There was no significant association between location of embolisation, initial splenic volumes, or percentage volume change.

CONCLUSION

This study demonstrated a statistically significant change in splenic volume post angioembolisation in trauma, which was associated with AAST grading but not location of embolisation. The low rate of altered red cell morphology appears transient.

Residual Splenic Volume after Main Splenic Artery Embolization is Independent of the Underlying Disease

Purpose:

To assess the safety and efficacy of main splenic artery embolization. To assess the potential difference post-embolization of the residual splenic volume in patients embolized for trauma versus those embolized for (pseudo)aneurysms.

Materials and Methods:

A retrospective analysis was performed on a cohort of 65 patients (36 males) who underwent pre- and post-embolization computed tomography. Patients’ demographics, pre- and post-interventional medical and radiological data were gathered. Splenic volume calculations were semi-automatically performed via a workstation. Patients with splenic aneurysms or pseudoaneurysms of the main splenic artery (group 1) were compared to those with splenic rupture (group 2) using Wilcoxon rank tests.

Results:

The main indications for splenic artery embolization were splenic rupture (n = 22; 34%) and splenic pseudoaneurysm (n = 19; 29%). The technical success rate was n = 63; 97%. The procedure-related complication rate was n = 7; 11%, including abscess formation (n = 5; 8%), re-bleeding (n = 1; 1.5 %) and pseudoaneurysm re-opening (n = 1; 1.5%). The overall 30-day mortality was n = 7; 11%.

Median follow-up for groups 1 and 2 was 1163 days (61–3946 days) and 702 days (43–2095 days) respectively. When processable (n = 23), the splenic volume in group 1 (n = 7) was 311 cm³ and 257 cm³ (p = 0.1591) before and after embolization respectively, and in group 2 (n = 16) it was 261 cm³ and 215 cm³ (p = 0.4688), respectively.

Conclusions:

Main splenic artery embolization is efficacious, with low procedure-related complication and 30-day mortality rates. No significant differences in residual post-embolization splenic volume were found between patients treated for splenic rupture versus those treated for splenic arterial (pseudo)aneurysm.

Quality of Life and Clinical Outcome After Traumatic Spleen Injury (SPLENIQ Study): Protocol for an Observational Retrospective and Prospective Cohort Study

Background

Little is known about the effect of a splenic rupture on the quality of life (QOL) of patients, although the spleen is one of the most frequently injured organs in blunt abdominal trauma. It is essential to obtain more knowledge about QOL after traumatic spleen injury so that this can be taken into account when choosing treatment.

Objective

The primary objective of the SPLENic Injury and Quality of life (SPLENIQ) study is to determine QOL after treatment for traumatic spleen injury. The secondary objective is to investigate clinical and imaging outcome in relation to QOL.

Methods

A combination of a retrospective single-center and a prospective multicenter observational cohort study will be conducted. Patients in the retrospective study have had a splenic injury after blunt abdominal trauma and were admitted for treatment to the ETZ Hospital (Elisabeth-TweeSteden Ziekenhuis) in Tilburg between January 2005 and February 2017. Concerning the prospective cohort study, patients with splenic injury admitted to 1 of the 10 participating hospitals between March 2017 and December 2018 will be asked to participate. The follow-up period will be 1 year regarding QOL, clinical symptoms, and imaging. Patients in the retrospective study will complete 2 questionnaires: World Health Organization QOL assessment instrument-Bref (WHOQOL-Bref) and 12-Item Short-Form Health Survey (SF-12). Patients in the prospective study will complete 5 questionnaires at 1 week, 1 month, 3 months, 6 months, and 12 months after treatment: WHOQOL-Bref, SF-12, Euroqol 5-Dimensional 5-Level (EQ-5D-5L) questionnaire, Institute for Medical Technology Assessment (iMTA) Productivity Cost Questionnaire (iPCQ), and iMTA Medical Consumption Questionnaire (iMCQ). In both the retrospective and prospective study, patients treated with splenic artery embolization will undergo magnetic resonance imaging (MRI). The retrospective group will undergo MRI once, and the prospective group will undergo MRI 1 month and 1 year after treatment. Treatment of splenic injury depends on the severity of the splenic injury, the hemodynamic condition of the patient, and the hospital’s or doctor’s preference. This study is observational in nature without randomization. Concerning the retrospective data, multivariate analysis of covariance will be done. With regard to the prospective data, mixed linear modeling will be performed.

Results

This project was funded in April 2015 by ZonMw. The results of the retrospective study will be expected in March 2019. With regard to the prospective study, inclusion of patients was completed in December 2018 and data collection will be completed in December 2019. The first results will be expected in 2019.

Conclusions

To our knowledge, this is the first study that examines QOL in patients with a traumatic spleen injury. The SPLENIQ study responds to the shortage of information about QOL after treatment for traumatic spleen injury and may result in the development of a patient-oriented protocol.

Trial Registration

ClinicalTrials.gov NCT03099798; https://clinicaltrials.gov/ct2/show/NCT03099798 (Archived by WebCite at http://www.webcitation.org/714ZKV6A0).

International Registered Report Identifier (IRRID)

DERR1-10.2196/12391

Unusual Case of Life-Threatening Gastro Intestinal Bleed from a Splenic Artery Pseudoaneurysm: Case Report and Review of Literature

Large upper gastro intestinal (GI) bleeding can be life-threatening. Splenic artery pseudoaenurysm (SAP) is rare but can cause massive upper GI bleeding. We report a case of a 57-year-old woman who had massive upper GI bleeding from SAP eroding into distal duodenum. Literature review shows SAP can bleed into stomach or pancreatic pseudocyst or biliary tree and peritoneal cavity; however, there are no previous reported cases of SAP bleeding into distal duodenum. Splenic artery embolization (SAE) is the preferred treatment for a bleeding SAP. Splenic infarcts can result following a SAE.

Intra-arterial ampicillin and gentamicin and the incidence of splenic abscesses following splenic artery embolization: A 20-year case control study

PURPOSE

Splenic abscesses represent a major complication following splenic artery embolization. The purpose of this study was to assess the effectiveness of intra-arterial antibiotics administered during splenic artery embolization in reducing splenic abscess formation.

MATERIALS AND METHODS

406 patients were screened. 313 (77.1%) patients who underwent splenic artery embolization and were >18 years old were included. Mean age of the cohort was 58 ± 15 years (range: 18-88 years). There were 205 (65.5%) male patients and 108 (34.5%) female patients. 197 (62.9%) patients underwent embolization without intra-arterial antibiotics and 116 (37.1%) patients underwent embolization with 1 g ampicillin and 80 mg gentamicin administered in an intra-arterial fashion. Primary outcome was splenic abscess formation. Secondary outcomes included type of splenic artery embolization, embolic agent, and technical success.

RESULTS

Partial splenic embolization was performed in 229 (73.1%) patients. Total splenic embolization was performed in 84 (26.8%) patients. Platinum coils were the most commonly used embolic agent overall (n = 178; 56.9%) followed by particulates (n = 114; 36.4%). Embolization technical success was achieved in 312 (99.7%) patients. 7 (3.6%) splenic abscesses were detected in the non-intra-arterial antibiotic group and 1 (0.9%) in the intra-arterial antibiotic cohort (P = 0.27). Coils were found to be statistically more likely to result in splenic abscesses than any other embolic agent (P = 0.03). Mean time to abscess identification was 74 days ±120 days (range: 9-1353 days).

CONCLUSION

Splenic abscesses occurred more frequently in patients who did not receive intra-arterial antibiotics during splenic embolization; however, this did not reach statistical significance.

Use of Iodized Oil and Gelatin Sponge Embolization in Splenic Artery Coiling Reduces Bleeding from Laparoscopic Splenectomy for Cirrhotic Portal Hypertension Patients with Complicating Hypersplenic Splenomegaly: A Comparative Study

OBJECTIVE

Laparoscopic splenectomy (LS) is relatively contraindicated in cirrhotic portal hypertension (CPH) patients with complicating hypersplenic splenomegaly (HS). This study aimed to evaluate the effectiveness and safety of incorporation of iodized oil and gelatin sponge embolization to conventional splenic artery embolization (cSAE) with coiling in CPH/HS patients undergoing LS.

PATIENTS AND METHODS

Between April 2012 and March 2014, eligible CPH/HS patients (n = 56) were assigned to preoperative modified SAE (mSAE) with LS (mSAE+LS group, n = 16), cSAE with LS (cSAE+LS group, n = 20) or LS alone (LS group, n = 20). Main outcome measures included frequency of conversion to laparotomy, operative time, intraoperative bleeding, and transfusion.

RESULTS

The three groups had similar baseline characteristics (all P > .05). mSAE and cSAE similarly decreased LS conversion frequency (mSAE+LS versus cSAE+LS versus LS, 0.0% versus 10.0% versus 30.0%, P = .030) and operative time (155 ± 23 minutes versus 170 ± 26 minutes versus 221 ± 42 minutes, P < .001) compared with LS alone. mSAE significantly reduced bleeding (178 ± 22 mL versus 250 ± 27 mL versus 328 ± 67 mL, P < .001) compared with cSAE and LS alone. The three groups had similar postoperative recovery times and surgical morbidities (all P > .05).

CONCLUSIONS

In CPH/HS patients, preoperative SAE reduced LS conversion frequency and reduced operative time compared with LS alone, while mSAE further decreased volume of blood loss.