Elsevier

Injury

Volume 45, Issue 5, May 2014, Pages 894-901
Injury

Effect of renal angioembolization on post-traumatic acute kidney injury after high-grade renal trauma: A comparative study of 52 consecutive cases

https://doi.org/10.1016/j.injury.2013.11.030Get rights and content

Abstract

Background

Acute kidney injury (AKI) is associated with unfavourable outcomes and higher mortality after trauma. Renal angioembolization (RAE) has proved efficiency in the management of high-grade renal trauma (HGRT), but inevitably expose to unavoidable ischaemic areas or contrast medium nephrotoxicity which may impair renal function in the following hours. The aim of this study was to assess the potential acute impact of RAE on renal function in a consecutive series of HGRTs treated nonoperatively.

Materials and methods

Of 101 cases of renal trauma admitted to our Regional Trauma Center between January 2005 and January 2010, 52 cases of HGRT were treated nonoperatively; they were retrospectively classified into 2 groups according to whether RAE was used. Incidence and progression of AKI (RIFLE classification), maximum increase in serum creatinine (SCr), level since admission and recovery of renal function at discharge were compared between the groups. Multivariable analysis was performed to determine the role of RAE as an independent risk factor of AKI.

Results

RAE was performed in 10 patients within the first 48 h. The RAE and no RAE groups were comparable in terms of severity score, renal injury grade, and level of SCr on admission. AKI incidence (RIFLE score Risk or worse) after 48 and 96 h was 33% and 10%, respectively and did not differ significantly between groups at 48 h (p = 1.00) or 96 h (p = 1.00). The median maximum increase in SCr was significantly higher in no RAE than RAE group (30.4% vs. 6.9%, p = 0.04). RAE was not found to be a significant variable in a multiple linear regression analysis predicting maximum SCr rise (p = 0.34). SCr at discharge was >120% of baseline in only 5 patients, with no difference according to RAE (p = 0.24).

Conclusion

In a population of nonoperatively treated HGRT, the incidence of AKI decreased from almost 30% to 10% at 48 h and 96 h. RAE proceeding did not seem to affect significantly the occurrence and course of AKI or renal recovery. The decision to use RAE should probably not be restricted by fear of worsening renal function.

Section snippets

Background

After severe trauma, acute kidney injury (AKI) is a frequent and severe complication leading to increased morbidity and mortality [1], [2], [3]. Post-traumatic AKI is a complex disorder resulting from multiple risk factors such as age, injury severity, circulatory shock, rhabdomyolysis, abdominal trauma, or exposure to contrast medium [4], [5]. After renal trauma, additional risks have been identified due to direct parenchymal or vascular injuries [6]. It has been established that renal

Study design and patients

This retrospective study was performed in the Level I Regional Trauma Center of Lapeyronie Hospital (university institution in Montpellier, France). All patients diagnosed with a renal trauma on a computer tomography (CT) scan between January 2005 and January2010 were reviewed. Those with HGRT (defined by AAST OIS ≥3) initially treated by nonoperative management were included in this present study. We have reported previously our strategy of selective angiography using CT scan criteria in this

Population and initial management

Of 101 renal traumas admitted during the study period, 43 patients with AAST-OIS grade I and II renal traumas and 6 patients with HGRTs (4 nephrectomies, 1 nephrorrhaphy and 1 early death as a result of brain injury) were excluded. Finally, 52 patients with HGRT treated by nonoperative management were included in the present study. The main characteristics of the patients are summarized in Table 2. The mean age was 33.9 (SD 18.0) years, mean ISS was 22.7 (SD 15.5), and mean SAPS II was 22.2 (SD

Discussion

In the present study, we reviewed 52 consecutive cases of HGRT treated by nonoperative management; 10 patients benefited from RAE within the first 48 h depending on their clinical status and angiographic criteria. According to the RIFLE scoring system, AKI occurred in one-third of patients at 48 h and strongly regressed in most of the patients in the following days. At discharge, almost all patients recovered normal renal function; only 5 (10%) remained with a slightly increased SCr (125–165%

Conclusion

In our study of 52 consecutive patients with HGRT managed nonoperatively, AKI defined by a RIFLE stage of Risk or worse occurred in 30% of patients within the first 48 h and was still present in 10% of patients at 96 h. Despite unavoidable ischaemic areas or contrast medium toxicity, we found that performing RAE did noticeably influence neither the onset of AKI, nor renal recovery in the following days. Aware of the retrospective nature of the study and size of cohorts, our preliminary results

Conflict of interest

The authors have no conflict of interest to declare.

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