Nathan Lanham, Department of Orthopaedic Surgery, Martin Army Community Hospital, Fort Benning, GA 31905, United States

Kyle Bockelman, Department of Orthopaedic Surgery, William Beaumont Army Medical Center, El Paso, TX 79920, United States

Fernando Lopez, Department of Anesthesiology Surgery, Martin Army Community Hospital Fort Benning, GA 31905, United States

Marc M Serra, Bradford Scanlan, Department of Oral and Maxillofacial Surgery, Womack Army Hospital, Fort Bragg, NC 28310, United States

Abstract On September 20, 2017 Hurricane Maria, a category 4 hurricane, made landfall on the eastern coast of Puerto Rico. This was preceded by Hurricane Irma, a category 5 hurricane, which passed just off the coast 13 d prior. The destruction from both Hurricane Irma and Maria precipitated a coordinated federal response which included the Federal Emergency Management Agency (FEMA) and the United States military. The United States Army dispatched the 14th Combat Support Hospital (CSH) to Humacao, a city on the eastern side of the island where Maria made landfall. The mission of the 14th CSH was to provide medical humanitarian aid and conduct disaster relief operations in support of the government of Puerto Rico and FEMA. During the 14th CSH deployment to Puerto Rico, 1157 patients were evaluated and treated. Fifty-seven operative cases were performed to include 23 orthopaedic cases. The mean age of the orthopaedic patients treated was 45.7 years (range 13-76 years). The most common operation was irrigation and debridement of open contaminated and/or infected wounds. Patients presented a mean 10.8 d from their initial injury (range 1-40 d). Fractures and infections were the most common diagnoses with the greatest delay in treatment from the initial date of injury. The deployment of the 14th CSH to Puerto Rico was unique in its use of air transport, language and local customs encountered, as well as deployment to a location outside the continental United States. These factors coupled with the need for rapid deployment of the 14th CSH provided valuable experience which will undoubtedly enable future success in similar endeavors.

Key words: Hurricane Maria; Disaster relief; Combat support hospital; Army

INTRODUCTION

On September 20, 2017 Hurricane Maria, a category 4 hurricane, made landfall on the eastern coast of Puerto Rico. This was preceded by Hurricane Irma, a category 5 hurricane, which passed just off the coast 13 d prior. The destruction which ensued precipitated a coordinated federal response which included the Federal Emergency Management Agency (FEMA) and the United States military. United States Army assets were mobilized to Puerto Rico to provide support in the form of personnel,food, drinking water, medicine, and military aircraft. In addition to providing immediate relief services, the United States Army dispatched the 14thCombat Support Hospital (CSH) to Humacao, a city on the eastern side of the island where Maria made landfall. The mission of the 14thCSH was to provide medical humanitarian aid and conduct disaster relief operations in support of the government of Puerto Rico and FEMA.

From October 6 through November 12, 2017, the 14thCSH provided medical and surgical services for the population of Humacao and surrounding region. The purpose of this paper is to describe the mission and capability of the 14thCSH, detail the operative care provided to orthopaedic patients, and provide lessons learned from the humanitarian and disaster relief operations conducted in Puerto Rico in response to Hurricane Maria.

BACKGROUND

The 14thCSH is one of several active duty combat support hospitals within the Army Medical Department. CSH’s are an essential element within the echelons of care in battlefield medicine. A CSH affords the highest level of medical, surgical, and trauma care available within the combat zone. They possess modular configurations which allow commanders to tailor medical support to various operational environments.Specialists which can be assigned to a CSH include general surgeons, orthopaedic surgeons, thoracic surgeons, vascular surgeons, obstetrician/gynecologists, and urologic surgeons. In addition to laboratory and radiographic capabilities, CSH’s also offer a blood blank and nutrition capabilities. The 44-bed CSH configuration can have up to 250 personnel, with two operating tables, 20 intensive care unit (ICU) beds, and 24 holding beds. Within combat environments, patients are typically held no longer than 72 h prior to evacuation to higher echelons of care[1].

While the primary mission of the 14thCSH is to provide the highest level of patient care within combat zones in support of conventional military operations, a secondary mission of the 14thCSH involves the Defense Support of Civil Authorities (DSCA).DSCA includes support provided by United States military forces, Department of Defense (DOD) civilians, DOD contract personnel, DOD Component assets, and National Guard forces in response to requests from civil authorities for domestic emergencies within the continental United States, Alaska, Hawaii and United States territories. This support can involve law enforcement, certain domestic activities, or certain qualifying entities for special events[2]. Examples of prior United States military DSCA missions include: The response to Hurricane Katrina[3]in 2005 as well as hurricane Sandy[4]in 2012.

Given the scope and scale of destruction which resulted from Hurricane Maria, the 14thCSH was activated in support of its DCSA mission role. The operations of the 14thCSH were conducted out of the Humacao Arena, an 8000-seat building which was the home of a local professional basketball team. The structure suffered minimal damage and possessed its own generator with central air conditioning. It was also located within a few miles of the city’s two main hospitals and was easily accessible by two major highways. A landing zone was set up immediately across from the arena in a large open field for air medical and transport operations. The 14thCSH operating room and radiology facilities were set up just outside the arena (Figure 1). The Emergency Medical Treatment section, Pharmacy, Laboratory, as well as inpatient wards were set up within the arena (Figure 2).

INTERVENTION

Patients presented to the CSH either by military or local civilian medical transport.The patients were then evaluated by triage nurses and physicians to ensure the patients could be effectively managed with the resources of the CSH. Patients necessitating resources beyond the capability of the CSH were transferred to other military or local medical facilities.

During the 14thCSH deployment to Puerto Rico, 1157 patients were evaluated and treated. Fifty-seven operative cases were performed to include 23 orthopaedic cases.The mean age of the orthopaedic patients treated was 45.7 years (range 13-76 years).The most common operation was irrigation and debridement of open contaminated and/or infected wounds (Table 1). Patients presented a mean 10.8 d from their initial injury (range 1-40 d). Fractures and infections were the most common diagnoses with the greatest delay in treatment from the initial date of injury (Table 1).

Patients were assessed pre-operatively by the Medicine and Anesthesia services.Mean the American Society of Anesthesiologists (ASA) scores were 2.3 (Table 1).Diabetes was the most common co-morbid diagnosis. Regional anesthesia was performed at the discretion of the Anesthesia Service after discussion with the operating physician. A total of 8 regional blocks were performed. All patients received pre-operative antibiotics. Intra-operative cultures, when obtained, were sent to a local hospital laboratory for processing. Intra-operative plain radiographs were performed with a portable unit which had a viewing station located just outside the operating room.

Five patients were discharged on the same day as their operation. Patients without risk factors for DVT and isolated lower extremity fractures were managed with 81 mg ASA twice daily for DVT prophylaxis as inpatients. One post-operative patient was transferred to another facility after his septic joint was irrigated and debrided for further evaluation and treatment given his multiple medical co-morbidities which necessitated a higher level of medical care. The remaining post-operative patients were discharged to their respective local residences with patient instructions, followup plans of care, medications, and dressing supplies if necessary.

Resorbable suture was used when 2 wk follow up went beyond the anticipated conclusion of CSH operations. In addition, patient follow-up and care coordination was made with local providers and other military medical assets. These included a local non-operative orthopaedist, the ambulatory clinic at Fort Buchanan, and the USNS Comfort. No immediate complications were observed however even immediate short term follow-up was limited. Mean follow-up with post-operative patients was 7.5 d (range 0-28 d).

CONCLUSION

This case series provides the first description of orthopaedic care provided by a CSH on a DSCA mission. The deployment of the 14thCSH to Puerto Rico was unique for many reasons. These included: Use of air transport, language and local customs encountered, as well as deployment to a location outside the continental United States. These factors coupled with the need for rapid deployment of the 14thCSH provided va1uab1e experience which will undoubted1y enab1e future success in simi1ar endeavors.

Figure 1 The 14th Combat Support Hospital operating room and radiology facilities were set up just outside the arena. A: 14th Combat Suppot Hospital operating and radiology mobile units; B: 14'h Combat Suppot Hospital operating and radiology mobile units along with storage containers and supplies staged outside the arena; C: Operating room with two table set-up

Another unique e1ement of the 14thCSH relief efforts was its direct collaboration with Disaster Medica1 Assistance Teams (DMAT). A DMAT is a trained, mobi1e, selfcontained, self-sufficient, mu1tidiscip1inary medica1 team that can respond rapid1y after a disaster (48 to 72 h) to provide medica1 treatment to an affected area. The team can include physicians, nurses, pharmacists, paramedics, and EMTs. DMATs fall under the Nationa1 Disaster Medica1 System (NDMS), a federally coordinated system with the United States Department of Hea1th and Human Servicesl51· Mu1tip1e DMATs assisted the 14thCSH efforts for 2 weeks at a time and were an important part of the triage and treatment of the 10ca1 popu1ation. These teams operated out of the same 10cation and used the same facilities as the 14thCSH.

Short1y after the 14thCSH became operationa1, representatives from the 14thCSH contacted 10ca1 hospita1s to assist with he1ping these facilities become more operational. This included coordinating the request and delivery of needed supplies such as tarps and generator equipment. In addition, the 14thCSH engaged 10ca1 and regiona1 government to he1p with delivery of food and water to 10ca1 organizations and churches for distribution.

Within the Humacao area, the 14thCSH was ab1e to 10cate on1y one practicing orthopaedic surgeon who was working part-time as a non-operative provider. This 1ed to challenges with coordinating care for patients in anticipation of the 14thCSH's departure. In addition, patients faced challenges with access to orthopaedic surgeons outside of the Humacao area due to overburdened hospita1s as well as underinsurance andj or no insurance. This 1eft a 1arge patient popu1ation within the Humacao region in need of orthopaedic services. Many of the patients presenting for orthopaedic care had de1ayed presentations which made treatment more difficu1t. This included patients presenting with ma1united fractures and sub-acute infections Other challenges included adverse effects of weather on facilities and equipment which included power outages, 10ss of climate contro1 in the operating room and patient wards, and water 1eakage into the operating room and equipmentj supp1y areas. The operating room did not possess a viewing station for digitally captured radiographs which made viewing intra-operative radiographs challenging.

Figure 2 The Emergency Medical Treatment section, Pharmacy, Laboratory, as well as inpatient wards were set up within the arena. A: Emergency Medical Treatment, Intensive Care Unit and Intermediate Care Ward sections arranged around the periphery of the arena. The central portion of the arena was used for storage of equipment and supplies; B: Intensive Care Unit section and associated equipment. There were two 20 bed Intensive Care Unit sections, one 10 bed Emergency Medical Treatment section, and one 20 bed Intermediate Care Ward section.

Despite experiencing many similar challenges, the 14thCSH was able to provide orthopaedic care to residents within the Humacao region and performed nearly two dozen orthopaedic cases. Although follow-up was very limited, there were no immediate complications. In all cases, management was guided by the principle of“primum non nocere” (first do no harm). Additional objectives focused on operative intervention which required limited ancillary support and follow-up. Comprehensive work-up and treatment was performed by a multi-disciplinary team comprised of specialists in nutrition, pharmacy, medicine, anesthesia, and surgery in order to optimize patients peri-operatively.

As an essential element within the echelons of care in battlefield medicine with equipment and personnel typically configured for combat zones, the 14thCSH primarily possessed capability for damage control intervention with less capacity for the subacute and ambulatory patients which presented during the relief effort. When fixation was performed it was most often definitive fixation with small fragment or mini-fragment plates and screws. Percutaneous K-wire fixation was also utilized in a few cases in the hand and upper extremity. One case necessitated the shipment of implants to the CSH. In addition, capability for definitive management for subacute and ambulatory patients was also limited due to a lack of fluoroscopy and a radiolucent operating table.

This case series illustrates the unique capabilities of the CSH and as well as the orthopaedic conditions encountered the hurricane Maria disaster relief effort. It also highlighted challenges of providing care to patients with limited resources and uncertain follow-up care. Future similar efforts will undoubtedly benefit from the experience gained and lessons learned by the 14thCSH’s deployment to Puerto Rico.

Table 1 Summary of the patients included in series