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Epidemiology of death in the emergency department of a tertiary health centre south-south of Nigeria

Background: The emergency department (E.D) of any hospital is an important entry point of critically ill patients. The initial management of these patients is often challenging, and for valuable lives to be saved, the in fracture and manpower should be up to date. Objective: To analyze the epidemiology of death in our Emergency Department within 72hours after admission, the death rate, and to establish any contributory factors. Method: Demographic data, time of arrival at the ED ,physical finding, the Glasgow coma scale(GCS),the injury severity score(ISS),the diagnosis, investigations done, treatment offered ,the time of death and the autopsy report, were entered into a Proforma. These data was analyzed using EPI-Info statistical programme version 3.4.3 of 2007. Results: Four thousand and eleven (4,011) patients were seen in the E.D during the period. A total of three hundred and fifty five (355) mortalities were recorded. Their ages ranged from 4-87years, with an average of 34.5years.The male: female ratio was 2.1:1. The overall mortality in the hospital during the period was 859: the E.D mortality figure representing 41.3%. Fifteen patients were brought in dead. The 355 deaths fell into two categories: trauma and non-trauma. One hundred and forty-seven (41.4%) persons died from trauma; road traffic accidents (RTAs) accounting for 118 (80.3%). Two hundred and eight (58.6%) persons died from nontrauma related causes, with chronic cardiovascular disorders been the most frequent cause of death 52[25.0]. Majority of the mortalities were between 26-50 years age range. 86.2% of the mortalities presented late, greater than 6hours after the incidence. Within the 72 hours period, only 129(36.3%) were able to do the requested tests. Out of the 355 deaths, only 4[1.1%] were autopsied. An in-hospital 72hours death rate of 8.6 was recorded. Conclusion : Road traffic accidents and cardiovascular disorders are the common causes of emergency death in UCTH.A recorded death rate of 8.6% is high, suspected contributory factors include systemic deficiencies such as the lack of a trauma system, prehospital care; late presentation, the role of chemist operators, traditional healers, and delayed referral systems.


Introduction
The emergency department (E.D) of any hospital is an important entry point of critically ill patients. The initial management of these patients is often challenging, and for valuable lives to be saved, the in fracture and manpower should be up to date. This is because the morbidity and mortality in the E.D of any hospital is an indicator of the adequacy or otherwise of the state of clinical care and infrastructure 1 -3 . In the developing world, there is usually a paucity of skilled manpower in many clinical areas especially in trauma, as well as poorly equipped emergency units. These two factors, plus the poverty state of most patients, late presentation at the point of care, ignorance and the interference by untrained persons claiming to give medical care, often lead to most avoidable death 2,3 .
In general, mortality among traumatized patients has been related to the quality of pre-hospital care, the time lapse between injury and treatment, and type and extent of injury sustained 4 -6 . Often majority of the traumatized patients are from road traffic accidents (RTAs) 7 -9 presenting with bony and soft tissue injuries 10 which are beyond the comprehension and management skills most of the middle [untrained] men claiming to medical care.
The objectives of this analysis are to define the causes of death in the Emergency Department of our Institution within 72hours of patient admission; type of injuries sustained by traumatized cases; and factors that may have contributed to death. We believe that such a study will provide essential information needed for hospital policy formulation, staff and infrastructural development, and public education.

Methods
This prospective observational study was carried out from October 2005 to September 2007, at the Emergency Department[E.D] of the University of Calabar Teaching Hospital[UCTH], a tertiary health centre South-south of Nigeria. The department is divided into two sections; a resuscitation bay, and wards for males and females. There is a minitheatre manned by senior Anesthesiologist resident and anaesthetic nurses that can handle minor emergencies such as incision and drainage, wound exploration, debridement and closure. Within the complex is a pharmacy shop that opens for 24 hours. There are also hematolog y, chemical pathology and microbiology laboratories that offer services for 12 hours during working days, and on call basis on weekends. The x-ray department located within the same complex operates on the same modality. There is no intensive or critical care unit in the complex; patients requiring such service, usually those requiring organ support, are transferred by the ambulance to the old site of the hospital located about 4 kilometers within the city. The Department is currently headed by an orthopaedic surgeon, for the reason that the hospital does not currently have a trained trauma surgeon supported by a team of general practitioners who are permanent staff of the department, and senior residents from various Departments undergoing mandatory posting in emergency medical care in preparation for various levels of their examination. He runs the day to day administration of the department, provide orthopaedic trauma services, as well as give clinical directives. Soft tissues, cardiothoracic, urologic, maxillofacial, and otorhinolaryngological traumas, are referred to general surgical and the respective specialist units.
Currently there are no dedicated traumas or medical emergency teams. The nursing staff operates on an eight hourly shift duty, and consists of emergency trained nurses at the senior and non emergency trained at the junior cadre. The support staffs consist of orderlies, cleaners, security personnel, and drivers. The ambulance service is for 24 hours throughout the week, but runs only intra-and interhospital services. The department does not have specialist trauma surgeons and emergency physicians. It lacks modern imaging facilities like magnetic resonance imaging (MRI) or computerized tomography (CT) scan, which are crucial for effective emergency services 7,10 . At the state level, there are no pre-hospital care services, nor a trauma system.
The patients used for the study, were those on admission in the E.D for least 72hours. The 72hours benchmark was chosen, because it allows time for adequate monitoring of progress and data collection. The patients were admitted after a detailed history and physical examination by the consulting E.D clinician. The details of the patients demographic data, types of injuries, time of incidence, time of arrival in the E.D, previous care at any peripheral hospital, GCS, and the injury severity score [ISS], in the case of trauma patients; this was estimated using the method described by Bull JP 11 , investigations done, treatment offered before death, and autopsy reports where it was done were entered into a validated Proforma. The data was updated on a 12hourly basis. Patients who were treated and discharge, or refused admission were excluded from the study, as well as those who were brought in dead.

Data analysis
This was done using simple statistical methods to calculate averages and EPI-Info statistical programme

Trauma death
One hundred and forty-seven (147; 41.4%) persons died from trauma. Their ages ranged from 4-62 years with a mean of 37± 6.3 years, the male: female ratio as 6.7:1. The ISS range was from 9-75 with a median of 23.5 .Their GCS ranged from 6-15, with a median score of 6.1. Trauma victims were further categorized based on: type of injury sustained mechanisms of trauma and into passenger, pedestrian or rider, table  figure 2, figure 3. Road traffic accidents (RTAs) accounted for 118 (80.3%) of the deaths figure, with 106 (89.8%) of these sustaining head injury table 2. Thirty one (21.1%) had had first aid before presentation; 19(61.3%) in chemist shops, 7 (21.6%) in a private clinic, and 5(16.1%) in a primary or secondary public health centre. The treatment given by these classes of care givers consisted of wound dressing, antibiotics, analgesic and tetanus toxin and intravenous fluids.

Non-trauma victims
The time lapse between the onsets of the clinical problem to presentation at the ED varied from 4hours to 21days, with an average of 5.3 days. One hundred and fifty one (72.6%) of these emergencies have been seen by a doctor elsewhere, or treated in a chemist shop prior to presentation, with antimalaria, antibiotic, intravenous fluid ,analgesic and haematinics.

Investigations requested and done
Most were basic investigations, such as full blood count (complete blood count), pack cell volume or urinalysis. Others such as electrolytes, urea and creatinine; fasting or random blood sugar level; Xrays and ultrasonography scan were requested based on the clinical situation. Within the 72 hours period, 129(36.3%) were able to do the requested tests. The tests most likely to be done within the period include X-rays, ultrasonography scan, and blood sugar level. Some of the reasons why these tests were not done within this period included; delay in the laboratory due to absence of power, and lack of money to pay for the cost of carrying out the test.

Discussion
Our ED attends to patients in all specialties, except paediatric medical emergencies, that are seen in a dedicated paediatric unit outside the E.D. In our study, majority of the mortalities were medical 208 (58.6%; . However, the report by Ofoegbu et al from Benin city Nigeria 14 , vary from this, as they reported 75.5% trauma related death in the E.D of the University of Benin Teaching Hospital and 24.6% were medical death. This variation may not be satisfactorily explained by our study, but may be related to social factors like: violence level in the society, health awareness, poverty level and the level of industrialization. Ofoegbu and Afuwape reported higher incidences of gunshot wounds as well as some industrial injuries. We recorded only 2(1.4%) cases of death from gunshot wounds, with no death from industrial accident. Medical deaths in the 15 -25 years age range were related to infections and immunodeficiency syndrome (AIDS), while in the 26 -50 years age range, death was from end stage cardiovascular diseases, metabolic disorders, and organ failure; in keeping with earlier findings 2,12,14 .
This study showed that traumatic death involved mainly people in the 3rd -5th decades of life, 95(64.6%), which is in agreement with other authors 1-3 . This is the most active age group in any population, and their death constitutes an economic loss to families and the society 3 . Fifty-six percent of the patients spent up to 48hours in the E.D before death; this 3 rd modal death is usually traceable to deficiencies in the health care service in terms of infrastructure and manpower, these deficiencies were noted during the course of this study. The resuscitation, organ support, monitoring and early intervention were lagging or lacking, heralding the onset of sepsis and organ failure, facts documented by Trunkey et al 15 more than two decades ago.
The major source/mechanisms of trauma in our study was road traffic accidents, 80.3% (figure 2); similar findings had earlier been reported 1-3, 8, 16 . More than 60% of the patients, table 2, suffered head injury, which could not be properly defined due to the lack of imaging facilities like CT or MRI scan, and none had intensive care before death.
The median ISS was 23.5 which is high, but explained by the fact that the head, which carries the highest score, was the most commonly injured part of the body; involved in more than half of the victims. Forty nine (33.3%) of the trauma patients presented within 4-6hours period following the incidence, which is the period most trauma victims can be successfully managed with good prognosis 11,15,17 .The death of this group of patients can only be attributed to the severity of injury or systemic failure in one way or the other . The average time of arrival in the E.D from the onset of the clinical problem was 3.2 and 5.3 days for trauma and nontrauma patients respectively. The intervention by traditional healers, chemist shops and poorly equipped and poorly staffed peripheral hospitals may have contributed in creating this delay in presentation. Late presentation is a well known independent factor for poor prognosis in trauma patients 2, 3, 5 8 . We had earlier reported on the negative effect of the activities of this set of unlicensed care givers 18 . However the role of ignorance and poverty cannot be ruled out; poverty may be a possible explanation why only 129(36.3%) of the patients performed the requested investigations.
We also recorded a male preponderance among the death, the ratio of male: female was 6.7:1 and 1.2:1 among the trauma and non-trauma death respectively. The high death rate among the male gender in the trauma group can be explained by the fact that men constitute the majority of the traffic on the road anywhere in the world 19 , a fact which has been documented by other authors 1-3, 7, 8 . The high incidence of road traffic accident and the associated death noted in this study could be attributed to a variety of factors: bad roads, ill informed or untrained drivers, lack of a trauma system and prehospital care, paucity of facilities for intensive care for severally traumatized patients even at the tertiary care centres, and the lack of ambulance services to evacuate trauma victims to a nearby health facility were basic emergency care can be offered.
These are lapses that if corrected can reduce trauma death, as noted in the developed world, currently put at 6 -12 per 100,000 population on the average 4,7,19 . During the study, we observed that majority of the patients were brought into the E.D in private cars, taxis, trucks, and motor cycles. These forms of transportation are known to worsen outcome, especially in trauma patients 3,17,20,21 .
Our estimated death rate of 8.6% is high even by the standard of the developing countries. Investigators from other parts of the country Ajuwape et al 14 and Ekere et al 3 had 0.2% and 2% respectively. These two studies were however retrospective, with the possibility of incomplete data collection. The possible role played by neurosurgical services and imaging facilities like MRI and CT scan available in these centres, in lowering the death rate is also worthy of note.
We did not document anything suggestive of clinical incompetence nor management errors from the work force, due to work over lead, which McDermott et al 17,22 reports that accounted for 68.0% death in Australia among trauma victims. We suggest that, to reduce mortality in our E.D, there is an urgent need that the minimum in terms of infrastructure and man power be put in place. This will involve training or employing specialist trauma surgeons, emergency physicians, and the acquisition of modern imaging facilities like CT or MRI scan. At the state levels, there is an urgent need for the establishment of a trauma system, and pre-hospital care services. Such an investment will save our productive population from preventable /avoidable death.

Conclusion
Our documented death rate of 8.6% is high. This high death rate is multi-factorial: systemic deficiencies such as the lack of a trauma system, pre-hospital care; and facilities/manpower for investigating, monitoring, and intervention, as noted during the study. The patient related factors were; high poverty level and late presentation at the definitive care centre. The third factor is the role played by chemist operators, delayed referral system in primary, secondary and private health institutions and fourthly, the possible negative role by traditional healers and superstition which are not often obvious.