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CASE REPORT Table of Contents  
Ahead of print publication
Successful angioembolization with autologous subcutaneous fat in an open book pelvic fracture

 Department of Emergency Medicine, Adnan Menderes University School of Medicine, Aydın, Turkey

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Date of Submission09-Jun-2020
Date of Decision05-Sep-2020
Date of Acceptance20-Sep-2020
Date of Web Publication12-Feb-2021


Arterial bleeding due to pelvic fracture can be life-threatening, and angiographic embolization is the gold standard for its control. Various materials have been described, but most of them are not widely available, mainly because of the high costs. Here, we report a case of use of autologous subcutaneous fat tissue for successfully controlling bleeding in a patient with an anterior–posterior pelvic fracture.

Keywords: Embolization, open book, pelvic fracture, subcutaneous fat, trauma

How to cite this URL:
Ozluer YE, Avcil M, Dizman SE. Successful angioembolization with autologous subcutaneous fat in an open book pelvic fracture. Turk J Emerg Med [Epub ahead of print] [cited 2022 Jun 27]. Available from: https://www.turkjemergmed.org/preprintarticle.asp?id=309133

  Introduction Top

Bleeding due to pelvic fracture is associated with a high rate of mortality regardless of the fracture type.[1] Although the source of bleeding is mostly venous, it can originate from arteries or bones. Arterial bleedings are more likely to be associated with anterior-posterior pelvic fractures.[2] To date, various treatment options are described, including pelvic packing, external fixation, Resuscitative Endovascular Balloon Occlusion of the Aorta, and angioembolization.[3],[4],[5] These methods may be used alone or in combination depending on the severity of injury and bleeding. Pelvic angioembolization is state-of-the-art in hemorrhage control in pelvic fractures.[6] However, most of the embolizing agents are expensive and not widely available. Here, we describe a case report where pelvic bleeding control was achieved with angioembolization using autologous subcutaneous fat tissue as the embolizing agent.

  Case Report Top

A previously healthy 38-year-old male was hit by a car and brought to the Emergency Department by the Emergency Medical Service. On arrival, he was awake and alert, with a Glasgow Coma Scale of 15 and an Injury Severity Score of 9. His blood pressure was 125/73 mmHg with a heart rate of 96 beats/min (shock index = 1.3), and the oxygen saturation was 96% in room air. The patient had an odor of alcohol and stated that he could not remember what happened. Physical examination revealed tenderness in the lower abdomen, a laceration of 4 cm over the right anterior superior iliac spine, and a swollen, painful right knee. Focused Assessment with Sonography in Trauma examination indicated minimal free fluid around the bladder. Serum lactate, hemoglobin, and base deficit levels were 7.6 mmol/L, 11.5 g/L, and −12, respectively. To mitigate the risks of possible pelvic bleeding, a circumferential sheet was applied for pelvic stabilization.

The patient then underwent an emergency contrast-enhanced whole-body computed tomography (CT) scan of the head, neck, chest, abdomen, and pelvis. Pelvic CT revealed a Type B1 open book pelvic fracture according to the Tile classification, along with a hemorrhagic area adjacent to the right obturator muscle extending to the retroperitoneal space. A pelvic arterial angiogram indicated two different contrast extravasations from the branches of the right obturator artery [Figure 1]. After a nontargeted proximal embolization with Gelfoam, the extravasation resolved, and the patient was transferred to the critical care unit. After resuscitation with two bags of packed red blood cells and one pack of fresh frozen plasma, base deficit began to improve, however, an expected elevation in the hemoglobin level could not be achieved, which might be indicating a re-bleeding. To detect a re-bleeding and if present, to control the bleeding, we transferred the patient to the angiography suite once again [Graph 1]. We did not want to face the risk of inadvertent ischemia once again with another temporary, nontargeted embolization with Gelfoam. However, permanent embolization materials, including micro-coils or vascular plugs, in size appropriate for the patient's bleeding artery were not available at that moment. Therefore, we cannulated the culprit artery in a rather selective fashion with a 5 Fr microcatheter, and through it, we threaded three pieces of subcutaneous fat tissue obtained from the left femoral zone and sliced to small particles. The “blush” was resolved after a successful embolization [Figure 2]. The patient was transferred to the ward for planned elective surgery.
Figure 1: Extravasation from the bleeding artery

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Figure 2: Control angiogram after embolization with the fat tissue

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  Discussion Top

Pelvic angioembolization is effective for bleeding control in pelvic fractures. Various types of embolizing materials are available, including coils, plugs, particles such as gelatin sponge, and liquid substances such as polyvinyl alcohol and N-butyl cyanoacrylate. However, most of these agents are not widely available in every institution, mainly because of the high costs. By contrast, the Gelfoam is rather cheap with a quick, nonselective bleeding control profile, which makes it a reasonable choice for embolization, particularly in an emergency setting.[7] However, Gelfoam allows only temporary hemorrhage control and has a higher rate of rebleeding than permanently embolizing agents.[8]

As bleeding control is one of the basic tenets of trauma resuscitation which must be addressed proactively, lack of an expected elevation in hemoglobin levels despite blood transfusion raised our suspicions of a re-bleeding. Furthermore, we wanted to avoid the risks of a possible massive transfusion protocol in case of the bleeding control could not be achieved. Although the vital signs of the patient were in normal limits after blood transfusion, base excess level was −7, which indicated the patient is still having a hemorrhagic shock[9] [Graph 1]. Thus, we took the patient to the angiography suite once again for a control angiography to investigate whether a re-bleeding occurred.

Autologous fat embolization is recently being used, especially in units lacking resources. Only a few case reports are available on this method, and they all describe its use for 'repair' when complications arose during or just after an angiographic intervention. Following an aortic and mitral valve replacement in an 84-year-old female, Tokuishi et al.[10] used subcutaneous fat embolization to control bleeding from a bronchial artery after weaning from cardiopulmonary bypass. In two similar case reports, He et al.[11] and Çağdaş et al.[12] successfully used this method to manage coronary artery perforation during percutaneous coronary angiography. Recently, Arı et al.[13] used subcutaneous fat embolization for treating a renal artery perforation during percutaneous nephrolithotomy. In contrast with these reports, we used this method not for treating a complication but the situation itself.

The major setback of this method is the preparation of the fat tissue in an appropriate size to be threaded through a microcatheter may be time-consuming and not viable in a hemodynamically unstable patient. Our patient was hemodynamically stable throughout and was safely transferred to the ward without a complication associated with angiography and embolization. However, further studies on this method are needed.

  Conclusion Top

Autologous fat embolization seems to be cheap and effective for bleeding control and maybe an option in units with lacking resources. However, further studies are needed to justify this method.

Author contribution statement

Y.E.Ö., M.A., and S.E.D. contributed to the design and implementation of the research, to the analysis of the results and to the writing of the manuscript. S.E.D. took responbility of data collection, patient follow-up and reporting. Y.E.Ö. and S.E.D. took responsibility in the literature review. Y.E.Ö., M.A., and S.E.D. participated in conceptualizing the idea and constructing the manuscript. Y.E.Ö and M.A. performed the critical review. All authors reviewed and approved this submitted manuscript.

Conflicts of interest

None Declared.

Consent to participate

The authors certify that they have obtained all appropriate patient consent forms. In the form, the patient has given his consent for his images and other clinical information to be reported in the journal. The patient understand that name and initials will not be published and due efforts will be made to conceal identity, but anonymity cannot be guaranteed.

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  References Top

Uludag N, Tötterman A, Beckman MO, Sundin A. Anatomic distribution of hematoma following pelvic fracture. Br J Radiol 2018;91:20170840.  Back to cited text no. 1
Ierardi AM, Piacentino F, Fontana F, Petrillo M, Floridi C, Bacuzzi A, et al. The role of endovascular treatment of pelvic fracture bleeding in emergency settings. Eur Radiol 2015;25:1854-64.  Back to cited text no. 2
Coccolini F, Stahel PF, Montori G, Biffl W, Horer TM, Catena F, et al. Pelvic trauma: WSES classification and guidelines. World J Emerg Surg 2017;12:5.  Back to cited text no. 3
Thorson CM, Ryan ML, Otero CA, Vu T, Borja MJ, Jose J, et al. Operating room or angiography suite for hemodynamically unstable pelvic fractures? J Trauma Acute Care Surg 2012;72:364-70.  Back to cited text no. 4
Hörer T. Resuscitative endovascular balloon occlusion of the aorta (REBOA) and endovascular resuscitation and trauma management (EVTM): A paradigm shift regarding hemodynamic instability. Eur J Trauma Emerg Surg 2018;44:487-9.  Back to cited text no. 5
Tesoriero RB, Bruns BR, Narayan M, Dubose J, Guliani SS, Brenner ML, et al. Angiographic embolization for hemorrhage following pelvic fracture: Is it “time” for a paradigm shift? J Trauma Acute Care Surg 2017;82:18-26.  Back to cited text no. 6
Ierardi AM, Pesapane F, Hörer T, Reva V, Carrafiello G. Embolization and its limits: Tips and tricks. J Endovasc Resusc Trauma Manag 2019;3:120-30.  Back to cited text no. 7
Rong JJ, Liu D, Liang M, Wang QH, Sun JY, Zhang QY, et al. The impacts of different embolization techniques on splenic artery embolization for blunt splenic injury: A systematic review and meta-analysis. Mil Med Res 2017;4:17.  Back to cited text no. 8
Committee on Trauma, American College of Surgeons. Shock. In: Advanced Trauma Life Support Student Course Manual. 10th ed. Chicago, IL: American College of Surgeons; 2018. p. 42-62.  Back to cited text no. 9
Tokuishi K, Yamamoto S, Anami K, Moroga T, Miyawaki M, Chujo M, et al. Successful application of subcutaneous adipose tissue with fibrin glue in conservative treatment of tracheobronchial rupture. Ann Thorac Surg 2012;94:1726-9.  Back to cited text no. 10
He LY, Han JL, Guo LJ, Zhang FC, Cui M, Gao W. Effect of transcatheter embolization by autologous fat particles in the treatment of coronary artery perforation during percutaneous coronary intervention. Chin Med J (Engl) 2015;128:745-9.  Back to cited text no. 11
Çağdaş M, Karakoyun S, Yesin M, Rencüzoğulları İ, Artaç İ. Simple and inexpensive way for the treatment of guidewire-induced distal coronary perforation: Subcutaneous fat tissue embolization. Anatol J Cardiol 2016;16:E23-E24.  Back to cited text no. 12
Arı H, Arı S, Can V. A novel embolization technique for renal hemorrhage complication by autologous. Fat Tissue Balkan Med J 2020;37:108-11.  Back to cited text no. 13

Correspondence Address:
Yunus Emre Ozluer,
Department of Emergency Medicine, Adnan Menderes University School of Medicine, Kepez Mevkii, 09100, Efeler, Aydin
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/2452-2473.309133


  [Figure 1], [Figure 2]


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