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Colombia Médica

On-line version ISSN 1657-9534

Colomb. Med. vol.51 no.4 Cali Oct./Dec. 2020  Epub Dec 30, 2020

https://doi.org/10.25100/cm.v51i4.4510 

Review

Hemodynamically unstable pelvic fracture: A damage control surgical algorithm that fits your reality

David Mejia1  2 
http://orcid.org/0000-0003-0617-4303

Michael W. Parra3 
http://orcid.org/0000-0001-6496-6275

Carlos A. Ordoñez4  5  6 
http://orcid.org/0000-0003-4495-7405

Natalia Padilla7 
http://orcid.org/0000-0003-3292-6919

Yaset Caicedo7 
http://orcid.org/0000-0002-6128-0128

Salin Pereira Warr8 
http://orcid.org/0000-0002-8259-8274

Paula Andrea Jurado-Muñoz2 
http://orcid.org/0000-0002-6688-9944

Mauricio Torres9 

Alfredo Martínez9 
http://orcid.org/0000-0003-4902-5703

José Julián Serna4  5  6  10 
http://orcid.org/0000-0001-9829-8930

Fernando Rodríguez-Holguín4 
http://orcid.org/0000-0002-5326-2317

Alexander Salcedo4  5  6  10 
http://orcid.org/0000-0001-8187-0638

Alberto García4  5  6 
http://orcid.org/0000-0002-4096-1434

Mauricio Millán6  11 
http://orcid.org/0000-0002-5502-5745

Luis Fernando Pino5  10 
http://orcid.org/0000-0002-1179-2854

Adolfo González Hadad5  10  12 

Mario Alain Herrera5  10 
http://orcid.org/0000-0002-4526-7636

Ernest E. Moore13 
http://orcid.org/0000-0002-0419-4848

1 Hospital Pablo Tobon Uribe, Department of Surgery, Medellin, Colombia.

2 Universidad de Antioquia, Department of Surgery, Medellin, Colombia.

3 Broward General Level I Trauma Center, Department of Trauma Critical Care, Fort Lauderdale, FL, USA

4 Fundación Valle del Lili, Department of Surgery, Division of Trauma and Acute Care Surgery, Cali, Colombia.

5 Universidad del Valle, Facultad de Salud, Escuela de Medicina, Division of Trauma and Acute Care Surgery, Department of Surgery. Cali, Colombia.

6 Universidad Icesi, Cali, Colombia.

7 Fundación Valle del Lili, Centro de Investigaciones Clínicas (CIC), Cali, Colombia

8 Hospital Pablo Tobón Uribe, Grupo de Soporte Nutricional y Pared Abdominal, Medellin, Colombia

9 Fundación Valle del Lili, Department of Orthopedic Surgery, Cali, Colombia.

10 Hospital Universitario del Valle, Department of Surgery, Division of Trauma and Acute Care Surgery, Cali, Colombia.

11 Fundación Valle del Lili, Department of Surgery, Division of Transplant Surgery, Cali, Colombia

12 Centro Médico Imbanaco, Cali, Colombia.

13 University of Colorado, Denver Health Medical Center, Department of Surgery, Denver, CO USA.


Abstract

Pelvic fractures occur in up to 25% of all severely injured trauma patients and its mortality is markedly high despite advances in resuscitation and modernization of surgical techniques due to its inherent blood loss and associated extra-pelvic injuries. Pelvic ring volume increases significantly from fractures and/or ligament disruptions which precludes its inherent ability to self-tamponade resulting in accumulation of hemorrhage in the retroperitoneal space which inevitably leads to hemodynamic instability and the lethal diamond. Pelvic hemorrhage is mainly venous (80%) from the pre-sacral/pre-peritoneal plexus and the remaining 20% is of arterial origin (branches of the internal iliac artery). This reality can be altered via a sequential management approach that is tailored to the specific reality of the treating facility which involves a collaborative effort between orthopedic, trauma and intensive care surgeons. We propose two different management algorithms that specifically address the availability of qualified staff and existing infrastructure: one for the fully equipped trauma center and another for the very common limited resource center.

Key words: Hemodynamically unstable; damage control; pelvic fracture; REBOA; algorithm; limited resource center

Resumen

Las fracturas de pelvis ocurren en más del 25% de los pacientes con trauma severo y su mortalidad es alta, a pesar de los avances en la resucitación hemodinámica y las técnicas quirúrgicas. Esta mortalidad se explica por la hemorragia inherente y las lesiones extra pélvicas asociadas, las fracturas o las disrupciones ligamentarias de la pelvis aumentan el volumen del espacio pélvico, y conlleva a que la hemorragia pélvica se acumule en el espacio retroperitoneal. En poco tiempo, esto conduce a la inestabilidad hemodinámica y el rombo de la muerte. La hemorragia pélvica es un 80% venosa proveniente de los plexos pre-sacro / pre-peritoneal. El restante 20% es arterial por sangrado de las ramas de la arteria iliaca interna. Esta realidad podría ser cambiada a través de un manejo secuencial enfocado según la disposición de recursos del centro de atención y de un trabajo colaborativo entre ortopedistas, cirujanos de trauma e intensivistas. Este articulo propone dos algoritmos de manejo que están enfocados según la disponibilidad de un equipo calificado e infraestructura existente: uno para un centro de trauma totalmente equipado, y el otro para un centro con recursos limitados.

Palabras clave: Fractura pélvica; hemodinámicamente inestable; control de daños; REBOA; algoritmo; Centro hospitalario con recursos limitados

Remark

1) Why was this study conducted?
Pelvic hemorrhage is mainly venous with a high mortality. This reality can be altered via a sequential management approach that is tailored to the specific reality of the treating facility which involves a collaborative effort.
2) What were the most relevant results of the study?
We propose two different management algorithms that specifically address the availability of qualified staff and existing infrastructure: one for the fully equipped trauma center and another for the very common limited resource center.
3) What do these results contribute?
The optimal management of pelvic trauma in the hemodynamically unstable patient is controversial and its mortality rate can reach up to 50%. We believe that this reality can potentially be altered via a sequential and organized management approach adapted to the reality of treating facility.

Introduction

Pelvic fractures occur in up to 25% of all severely injured trauma patients and its mortality is markedly high despite advances in resuscitation and modernization of surgical techniques due to its inherent blood loss and associated extra-pelvic injuries 1-4. Pelvic ring volume increases significantly from fractures and/or ligament disruptions which precludes its inherent ability to self-tamponade resulting in accumulation of hemorrhage in the retroperitoneal space which inevitably leads to hemodynamic instability and the lethal diamond. Pelvic hemorrhage is mainly venous (80%) from the pre-sacral/pre-peritoneal plexus and the remaining 20% is of arterial origin (branches of the internal iliac artery) 5,6. This reality can be altered via a sequential management approach that is tailored to the specific reality of the treating facility which involves a collaborative effort between orthopedic, trauma and intensive care surgeons. We propose two different management algorithms that specifically address the availability of qualified staff and existing infrastructure.

This article is a consensus that synthesizes the experience earned during the past 30 years in trauma critical care management of the severely injured patient from the Trauma and Emergency Surgery Group (CTE) of Cali, Colombia which is made up of experts from the University Hospital Fundación Valle del Lili, the University Hospital del Valle "Evaristo García", the Universidad del Valle and Universidad Icesi, the Asociación Colombiana de Cirugia, the Pan-American Trauma Society and the collaboration of international specialists of the United States of America, Europe, Japan, South Africa and Latin America.

Epidemiology

More than 90% of patients evaluated in level 1 trauma centers with pelvic injuries are secondary to low-energy incidents. However, 5 to 10% of these are caused by high impact mechanisms and are associated with ongoing hemorrhage 7,8. The optimal management of pelvic trauma in the hemodynamically unstable patient is controversial and its mortality rate can reach up to 50%. Pelvic fractures are generally associated with other injuries which include thoracic (21%), intracranial (17%), abdominal (8%), and skeletal (7%) 4,7. An observational study conducted at the Hospital Universitari Parc Taulí in Sabadell, Spain, included 1088 trauma patients. One hundred and fifty-seven had pelvic fractures from blunt trauma, 63 were hemodynamically unstable and 97% of them had associated injuries. The median injury severity score (ISS) was 15 and the overall mortality reached 18.5% 9. A retrospective descriptive study conducted at San Vicente University Hospital Foundation in Medellín specifically studied the morbidity and mortality associated with high-energy orthopedic trauma. In this study, 3% of 357 patients suffered pelvic trauma secondary to motor vehicle accidents. Although the mortality was statistically low, the long-term functional disability rate significantly influenced the overall work absenteeism and productivity 10. A similar study in Cali included 220 patients with 351 fractures: 315 long bone, 20 pelvic and 16 vertebral. Ninety one percent (202) had associated abdominal injuries, 90% (198) thoracic and 84% (184) intracranial. The mechanism of injury most commonly involved was also motor vehicle accidents 71% (155) but in contrast, 14% were by gunshot wounds, 7% from land mines and 6% from falls 11.

Initial approach, diagnosis and surgical management

Fully equipped trauma center

Initial management must be directed towards the stabilization of the patient according to the Advanced Trauma Life Support (ATLS) guidelines which include the essential ABC’s. Damage control resuscitation (DCR) is initiated followed by a chest/pelvic x-rays and a focused assessment with sonography for trauma (FAST) 1,12-14. The most widely used radiographic staging system for pelvic ring fractures is the Young and Burgess classification, it takes into account force type, severity, direction and mechanical stability (Figure 1) 15. The choice between immediate surgical exploration or further extended imaging studies depends on the hemodynamic status of the patient. Those with hemodynamic instability (sustain systolic blood pressure (SBP) ≤90 mmHg) and/or associated surgical intra-abdominal injuries should be transferred immediately to the operating room (OR).

Figure 1 Young and Burgess Classification of Pelvic Ring Injuries15. Anterior Posterior Compression: I: Symphysis widening <2.5 cm II: Symphysis widening >2.5 cm. Anterior sacroiliac joint diastasis. Disruption of sacrospinous and sacrotuberous ligaments. III: Sacroiliac dislocation with associated vascular injury. Lateral Compression: I: Compression fractures of the pubic rami (superior pubic ramus and inferior pubic ramus) and ipsilateral anterior sacral ala. II: Rami fracture and ipsilateral posterior ilium fracture dislocation. III: Ipsilateral lateral compression and contralateral anterior posterior compression. Vertical Shear: Posterior and superior directed force.  

Based on our experience we propose a new algorithm for the management of hemodynamically unstable pelvic fractures in a fully equipped trauma center (Figure 2):

Figure 2 Management Algorithm of Hemodynamic Unstable Pelvic  

  • STEP 1: Attention should be directed towards identifying all immediate life-threatening injuries following the ABCDE mnemonic of ATLS (chest/pelvic x-ray and FAST exam) 1,12-14. Both a common femoral vein and artery lines are placed for intravenous access and blood pressure monitoring. An aggressive DCR is initiated via the activation of the institution’s massive transfusion protocol (MTP). The patient’s pelvic injury is then categorized according to the World Society of Emergency Surgery (WSES) classification (Table 1). This classification includes the type (Young and Burgees), the mechanical and the hemodynamic status of the patient 1,15.

  • STEP 2: The patients with hemodynamic instability related to their pelvic fractures require mechanical stabilization with an external fixation device that is readily available in the Emergency Room (ER)/Trauma Bay. This may be a sheet (pelvic girdle) or a commercial device such as a pelvic binder which exerts a compressive force on the pelvic ring, decreases movement of bone fragments and allows volume reduction 1,14. If the fracture is vertically displaced (Figure 1), longitudinal traction of the extremity may also be required 12.

  • STEP 3: If the patient is hemodynamically stable or a transient responder, a whole-body computed tomography (WBCT) should be performed to determine the extent of the pelvic fracture and the presence of any other associated injuries 16. If the patient remains hemodynamically unstable then the common femoral arterial line should be changed over a guidewire to a femoral sheath, followed by placement of a Resuscitative Endovascular Balloon Occlusion of the Aorta (REBOA) in Zone 1 which can be placed either in the ER or operating room.

  • STEP 4: If associated intra-abdominal surgical injuries are suspected and/or confirmed by WBCT, FAST and/or physical exam, then the patient should be taken immediately to the OR for exploratory laparotomy and pre-peritoneal pelvic (PPP) packing (Figure 3 A/3B ). If the pelvic fracture is unstable, invasive pelvic fixation (external fixator/C-clamp) should be considered, followed by pelvic angiography with embolization of any ongoing arterial bleeding 17. If associated intra-abdominal surgical injuries are not suspected nor confirmed then the REBOA balloon should be lowered and repositioned to zone 3, the pelvis should be PPP packed and pelvic angiography with embolization of any ongoing arterial bleeding should be performed 18.

  • STEP 5: The patient should be transferred to the intensive care unit (ICU) after angiography for lethal diamond correction. Once obtained, the patient should be transferred back to the OR for PPP packing removal and definitive wound closure. During this take back, if pelvic hemorrhage persists, then new packing should be reinstated and repeat pelvic angiography with possible embolization should be reconsidered 18.

Table 1 World Journal of Emergency Surgery (WSES) Pelvic Injury Classification 19  

WSES Grade Young-Burgees Classification Hemodynamic Mechanic
Minor I APC I - LC I Stable Stable
Moderate II APC II/III - LC II/III Stable Unstable
III VS - Combined Mechanism Stable Unstable
Severe IV Any Unstable Any

Figure 3 Pre-Peritoneal Pelvic Packing. A: Surgical approach via infraumbilical midline incision. B: Pre-peritoneal pelvic packing C: Pre-peritoneal pelvic packing is controlling the hemorrhage of internal iliac artery injury by the ilium and ischium fracture  

Limited resource center

Similarly, to a fully equipped trauma center, initial management must be directed towards the stabilization of the patient according to the ATLS guidelines which include the essential ABC’s. DCR is initiated followed by a chest/pelvic x-rays and a FAST if available 1,12-14. The pelvic fracture should be classified following Young and Burgess criteria (Figure 1) 15.

We propose a new algorithm for the management of hemodynamically unstable pelvic fractures that fits the reality of limited resources throughout the world (Figure 4):

Figure 4 Management Algorithm of Hemodynamic Unstable Pelvic Fractures in Limited Resource Centers 

  • STEP 1: Attention should be directed towards identifying all immediate life-threatening injuries following the ABCDE mnemonic of ATLS (chest/pelvic x-ray and FAST exam if available) 12,14. An aggressive DCR is initiated and the patient’s pelvic injury is then categorized according to the WSES classification (Table 1) 1.

  • STEP 2: The patients with hemodynamic instability related to their pelvic fractures require mechanical stabilization with an external fixation device that is readily available in the ER. This may be a sheet (pelvic girdle) or a commercial device (if available) such as a pelvic binder which exerts a compressive force on the pelvic ring, decreases movement of bone fragments and allows volume reduction 1,14. If the fracture is vertically displaced (Figure 1), longitudinal traction of the extremity may also be required 12.

  • STEP 3: If the patient is hemodynamically stable or a transient responder, a WBCT should be performed (if available) to determine the extent of the pelvic fracture and the presence of any other associated injuries 16. If the patient remains hemodynamically unstable then the patient should be taken immediately to the OR for an infra-umbilical PPP packing, followed by an orthopedic DCS (external fixator/C-clamp) or noninvasive external fixation as indicated per the type of fracture 19.

  • STEP 4: If associated intra-abdominal surgical injuries are suspected and/or confirmed then a supra-umbilical exploratory laparotomy should follow.

  • STEP 5: If the patient required PPP packing, orthopedic DCS and/or exploratory laparotomy then immediate transfer to a referral facility of higher care should be initiated. As well, patients who did not require any DCS procedure should also be transferred to a referral facility of higher care for follow-up pelvic angiography, ICU resuscitation and definitive pelvic fracture management 18.

Discussion

Despite advances in trauma critical care, mortality from severe pelvic fractures remains high, with more than a third of deaths secondary to uncontrolled hemorrhage 2. This has generated the creation of several different management algorithms in North America and Europe that have focused on the hemodynamically unstable severely injured patient with mixed results. The optimal management strategy of these patients remains controversial even in fully-equipped trauma centers and exclude the infrastructure of those with limited resources. The major challenge is the ability to integrate in a sequential and organized fashion all the components, equipment and personnel. For this purpose, we propose a surgical management algorithm that fits the reality of a fully functional level I trauma center and another that addresses the limitations that are common in many centers around the world. The essential components of both algorithms include: DCR, mechanical stabilization, PPP packing, angioembolization and the use of the REBOA (when feasible).

Damage control resuscitation

DCR seeks to combat metabolic decompensation of the severely injured trauma patient by battling three major fronts: permissive hypotension, hemostatic resuscitation, and DCS. The aim of permissive hypotension is to keep the blood pressure low enough to avoid dislodging a potentially forming soft blood clot at the site of traumatic hemorrhage and/or minimize the blood loss from it but high enough to continue to perfuse vital organs 20. Hemostatic resuscitation is the volumetric restoration of blood loss via a 1:1:1:1 blood component ratio of packed red blood cells, fresh frozen plasma, platelets and cryoprecipitates 21,22. Finally, DCS safeguards the trauma patients physiological reserve by controlling the source of surgical bleeding 23.

Mechanical stabilization

Simple application of the pelvic binder/sheet has been shown to improve the rotational stability of the pelvis and reduce by up to 60% the number of overall units of blood required to resuscitate the patient 19,24,25. The pelvic binder, when compared to the pelvic sheet, has greater effectiveness of hemorrhage control. However, in the setting where a pelvic binder is not readily available as it is the reality of many limited resource centers, then the pelvic sheet should suffice. All non-invasive external pelvic fixation devices should be removed as soon as possible to avoid soft tissue injuries and immediate orthopedic DCS techniques (external fixator/C-clamp) applied according to the appropriate pelvic fracture type in the OR by the orthopedic service, simultaneously as efforts are made by the treating trauma surgeon to control hemorrhage via PPP packing and also angioembolization of the pelvis by the interventional radiologist 17,19,26. Once hemorrhage is controlled and the patients have been adequately resuscitated in the ICU then plans for definitive invasive pelvic ring reconstruction by the orthopedic service can be considered when indicated.

Pre-peritoneal pelvic (PPP) packing

The PPP packing is the most important first-line management tool to achieve hemorrhage control in patients who are hemodynamically unstable from severe pelvic fractures due to the fact that 80% of all pelvic bleeding is venous in origin 14,27. This technique has gained popularity in recent years because it has been found to be safe and decrease the overall mortality of these patients when combined with other damage control strategies 28,29. The true advantage of this technique is that it requires minimal specialized equipment and basic surgical training on behalf of the treating physician. For this reason, it is a pillar in both of our proposed algorithms but it does require a follow-up operation between 24-48 hours for packing removal 17,30-33.

Angioembolization

Arterial injuries secondary to pelvic trauma have been reported to be up to 20% in patients with severe unstable ring injuries. Intra-pelvic arterial bleeding is difficult to control with external fixation measures alone, since an adequate tamponade effect is not effectively achievable 34. For this reason, arterial embolization has gained popularity as one of the techniques used to control bleeding in patients with pelvic fractures with active arterial bleeding 18. The indications for angioembolization according to WSES are 17,28,31,32:

  • Control of bleeding in patients with unstable pelvic fractures with arterial sources

  • Patients undergoing pelvic angiography with persistent signs of ongoing hemorrhage and in whom extra-pelvic sources of bleeding have been previously ruled out

  • Patients with ongoing hemorrhage and/or transfusion requirements after PPP packing

The need for angioembolization following PPP packing has been reported to be between 13 and 20% 35-38. However, Totterman et al. (39, reported that 80% of patients who underwent PPP packing had positive findings for arterial injury at angiography. That is why in our limited resource center algorithm it is a necessity to always transfer the patient to a higher care facility after the initial resuscitation and packing of the patient 29.

Resuscitative Balloon Occlusion of the Aorta (REBOA)

REBOA is an adjuvant technique for patient resuscitation that seeks to redistribute blood flow to vital organs. In patients with pelvic fracture and severe hemodynamic compromise, REBOA should initially be inflated in zone 1 and if associated intra-abdominal surgical injuries are not suspected nor confirmed then the REBOA balloon should be lowered and repositioned to zone 3 40. The 2019 preliminary report of the Aortic Balloon Occlusion Trauma Registry revealed that REBOA when combined with other invasive procedures, improved overall survival of the severely injured pelvic trauma patient 41,42. To this end, we have included the use of this innovative tool in our algorithm of the fully equipped trauma center but we realize that many limited resource centers do not count with this technology. Despite not having a REBOA, appropriate management and surgical hemorrhage control can still be achieved in a limited resource center, but we reiterate the need for a prompt and efficient transfer of these patients to a higher care facility as early as possible.

Conclusion

The optimal management of pelvic trauma in the hemodynamically unstable patient is controversial and its mortality rate can reach up to 50%. We believe that this reality can potentially be altered via a sequential and organized management approach adapted to the reality of treating facility. For this reason, we propose two different management algorithms that specifically address the availability of qualified staff and existing infrastructure: one for the fully equipped trauma center and another for the very common limited resource center.

Acknowledge:

Thanks for the illustrations and the design of the cover to the Anatomical Draftsman Fabian R. Cabrera P. Professor of the Design Department of the Faculty of Integrated Arts of the Universidad del Valle

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Received: June 20, 2020; Revised: October 16, 2020; Accepted: December 23, 2020

Corresponding Author: Carlos A. Ordoñez, MD, FACS. Division of Trauma and Acute Care Surgery, Department of Surgery. Fundación Valle del Lili. Cali, Colombia; Division of Trauma and Acute Care Surgery, Department of Surgery, Universidad del Valle, Cali, Colombia; Universidad Icesi, Cali, Colombia. Email: ordonezcarlosa@gmail.com, carlos.ordonez@fvl.org.co

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