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Meta-Analysis
. 2017 May 30:4:17.
doi: 10.1186/s40779-017-0125-6. eCollection 2017.

The impacts of different embolization techniques on splenic artery embolization for blunt splenic injury: a systematic review and meta-analysis

Jing-Jing Rong  1 , Dan Liu  1 , Ming Liang  1 , Qing-Hua Wang  2 , Jing-Yang Sun  1 , Quan-Yu Zhang  1 , Cheng-Fei Peng  1 , Feng-Qi Xuan  1 , Li-Jun Zhao  1 , Xiao-Xiang Tian  1 , Ya-Ling Han  1
Affiliations
Meta-Analysis

The impacts of different embolization techniques on splenic artery embolization for blunt splenic injury: a systematic review and meta-analysis

Jing-Jing Rong et al. Mil Med Res. .

Abstract

Background: Splenic artery embolization (SAE) has been an effective adjunct to the Non-operative management (NOM) for blunt splenic injury (BSI). However, the optimal embolization techniques are still inconclusive. To further understand the roles of different embolization locations and embolic materials in SAE, we conducted this system review and meta-analyses.

Methods: Clinical studies related to SAE for adult patients were researched in electronic databases, included PubMed, Embase, ScienceDirect and Google Scholar Search (between October 1991 and March 2013), and relevant information was extracted. To eliminate the heterogeneity, a sensitivity analysis was conducted on two reduced study sets. Then, the pooled outcomes were compared and the quality assessments were performed using Newcastle-Ottawa Scale (NOS). The SAE success rate, incidences of life-threatening complications of different embolization techniques were compared by χ2 test in 1st study set. Associations between different embolization techniques and clinical outcomes were evaluated by fixed-effects model in 2nd study set.

Results: Twenty-three studies were included in 1st study set. And then, 13 of them were excluded, because lack of the necessary details of SAE. The remaining 10 studies comprised 2nd study set, and quality assessments were performed using NOS. In 1st set, the primary success rate is 90.1% and the incidence of life-threatening complications is 20.4%, though the cases which required surgical intervention are very few (6.4%). For different embolization locations, there was no obvious association between primary success rate and embolization location in both 1st and 2nd study sets (P > 0.05). But in 2nd study set, it indicated that proximal embolization reduced severe complications and complications needed surgical management. As for the embolic materials, the success rate between coil and gelfoam is not significant. However, coil is associated with a lower risk of life-threatening complications, as well as less complications requiring surgical management.

Conclusions: Different embolization techniques affect the clinical outcomes of SAE. The proximal embolization is the best option due to the less life-threatening complications. For commonly embolic material, coil is superior to gelfoam for fewer severe complications and less further surgery management.

Keywords: Blunt splenic injury; Clinical outcome; Embolization; Location; Material.

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Figures

Fig. 1
Fig. 1
Flow diagram of study identification
Fig. 2
Fig. 2
Forest plot of embolization locations (Proximal vs Distal) associated with success rate (a), severe complications (b) and the incidence of DC III (c) in 2nd study set
Fig. 3
Fig. 3
Forest plot of embolization locations (Proximal vs Combination) associated with success rate (a), severe complications (b) and the incidence of DC III (c) in 2nd study set
Fig. 4
Fig. 4
Forest plot of different embolic materials (Coil vs Gelfoam) associated with success rate (a), severe complications (b) and the incidence of DC III (c) in 2nd study set
See this image and copyright information in PMC

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