Thursday, 30 July 2015



The ABC (airway, breathing and circulation) of emergency medicine can be modified and adapted according to the specific clinical scenario and circumstance of each individual case. Critically ill patients should be assigned to a triage category of either 1 or 2, meaning that these patients should be either seen immediately or within 10 minutes.

The approach to seriously ill patients can be simplified by considering the following four scenarios. Note that there is considerable overlap in the assessment and management of these patient scenarios, but it is nevertheless useful to consider and present each group separately.

A) Cardiac Arrest in Adults - Basic and Advanced Cardiac Life Support (ACLS)

B) Assessment and Management of the Severely Injured Patient - Acute Trauma Life Support (ATLS)

C) Assessment and Management of the Seriously Ill Adult Patient (Eg. Asthma, Pneumonia, Status Epilepticus etc)

D) 1. Assessment and Management of the Critically Ill or Injured Child - Paediatric Advanced Life Support, Acute Paediatric Life Support (PALS, APLS)

2. Resuscitation of the Newborn
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Wednesday, 29 July 2015



WHAT IS THE THREAT TO LIFE?

Perhaps the most important principle of emergency medicine is to search for and assume that the most potentially serious problem for each patient may be present, even if it is statistically improbable. Thus the key question will lead you away from an untimely focus on diagnosis. This question is: What is the threat to life? Always ask: are there any life threats, and am I missing something? For example, if a patient comes to the emergency department with chest pain, you should attempt to prevent a cardiac arrest, extension of the infarction, or worsening of the patient's disease instead of ordering an immediate ECG to prove the diagnosis of myocardial infarction. Thus your first response must be to place an intravenous line, start the patient on oxygen and consider anti arrhythmic drugs before proving or disproving the diagnosis.

DOES THE PATIENT NEED ADMISSION?

The second key question is: does the patient need admission? If you start with the perception that the patient is very ill, not only do you increase the diligence of the search for a cause, but you are also prevented from reaching through tunnel vision for a specific diagnosis that may in fact be incorrect. For example, a patient may look nearly normal after receiving intravenous fluids, but if the patient was in shock in the pre-hospital setting, more time will be needed to recover than you can arrange in the emergency department. Moreover you need to communicate to the physician who will be responsible for the in patient care of the patient, the perception that the patient is truly ill.

CAN THE DIAGNOSIS BE SUPPORTED BY THE EVIDENCE AVAILABLE?

One normal ECG tracing does not eliminate the diagnosis of an acute myocardial infarction, nor does a normal white cell count rule out a diagnosis of appendicitis. Can you prove what you believe the patient has, or will the diagnosis require other tests that are not available within the emergency department? For instance, more than one patient has been diagnosed as having reflux oesophagitis as an explanation for the "indigestion", that was actually a reflection of an inferior myocardial infarction. A barium swallow upper GI Xray study is not readily available in most emergency departments, but an ECG is. Also surprisingly common are cases in which all the evidence to support a serious diagnosis and mandate admission is present, but is ignored in favour of a trivial diagnosis

that cannot be supported by, but is compatible with the discharge of the patient. An example is sending the patient home with a diagnosis of gastroenteritis when the patient has no nausea, vomiting or diarrhoea but does have a tender abdomen and absent or diminished bowel sounds and is in the age group most common for appendicitis.

WHAT IS THE MOST SERIOUS DIAGNOSIS?

What is the most serious diagnosis that could apply to the patient's condition, and have I ruled it out? Many doctors appear to have an unwillingness to recognize serious disease, but unless they constantly search for it, it will never be found. Many patients are much sicker than they initially appear, which deceives even experienced physicians who are used to seeing patients late in the course of their disease rather than early on. Wishing that bad diseases do not occur in anyone is human nature, but the ability to be suspicious is integral to the safe and effective practice of emergency medicine

HAVE I ARRANGED A SATISFACTORY DISPOSITION?

In no other phase of medicine is it so critical to consider the circumstances under which a patient's disease is going to evolve and to obtain more than one point on a curve to determine if a patient is getting better or worse. Physicians sometimes make a definitive diagnosis in circumstances where it would be preferable to beg the question and see the patient again after some time. At this point many disasters in emergency medicine would be avoided. To either arrange to see the patient again personally or to ensure that the patient is seen by a consultant the next morning, or to keep the patient under observation prevents the all too common occurrence of the patient being sent back home to die or decompensate with a terrible outcome.

Many times the diagnosis, management and predicted outcome of a disease state is foiled by the failure to provide a satisfactory disposition: for example, sending a child with a fracture caused by non accidental trauma back to the same environment that produced it in the first place. This example may see to be extreme, but it occurs because the physician either does not recognize the child abuse or is content to report it to an appropriate agency and not pursue the next step of trying to address the environment.

Doctors also have difficulty using a hospital environment for something other than sophisticated diagnosis and treatment. This has been compounded by the health planners, insurance planners, and restrictions on admission. However, some patients need the help of a hospital to recover, and we must overcome our reluctance to do this for sociological reasons. One may be able to prescribe adequate analgesia for an elderly patient with a stable pelvic fracture, but if that patient lives alone and must climb the stairs, discharge is not going to be a satisfactory disposition for the patient. Similarly, a young adult can usually recover from pneumonia when treated as an outpatient, but if that patient is a

mother with three young children, she will not have any rest without being placed in hospital.

HAVE I PERFORMED A PERTINENT AND THOROUGH WORKUP?

Along with getting fooled by the early subtleties of disease, doctors tend to take short cuts when they become busy in the emergency department. You may conclude that the patient is not seriously ill and neglect to perform the rectal or pelvic examination that would provide useful information and perhaps steer you in the direction. You cannot practice perfect medicine, but if you use safe diligence, rarely will a problem remain unrecognized and unidentified.

WHY IS THE PATIENT HERE? HAVE I MADE HIM OR HER FEEL BETTER?

Many patients overestimate the magnitude of their illness, but more commonly, many people underestimate the magnitude of their problems. The frustration of trying to deal with illness during the day may drive some people to seek attention at night. No emergency department is without inconvenience, pain and expense, and to be there means one has a need requiring attention. 

We as doctors should understand that most patients would prefer to be somewhere other than in an emergency department. Many times doctors may be content with making a diagnosis such as viral syndrome and forget that knowing what is wrong does not necessarily help patients to feel better. Instead doctors should ask if I can lower a temperature, restore some fluids, relieve pain, and provide reassurance? These things are often overlooked in the pressure to "treat and street patients".

With inpatient services, physicians spend much less time with individual patients than do nurses, and in general are unaware that a large part of recovery from any illness is independent of invasive procedures. Doctors are sometimes fooled by subjective improvements in the patients' conditions. It is well known that a ruptured appendix may cause relief from the intense agony experienced while the appendix was under bursting pressure. The patient may therefore describe a feeling of subjective improvement, but objective findings will not support this. Have the patient's vital signs improved, have the positive physical findings that were so well described by the triage nurse on the initial examination improved, is there an explanation as to why the patient is better?

WAS I ANGRY WHEN I MADE MY DECISION?

Anger is an emotion that almost always guarantees faulty decision making. It is therefore wise to understand the cause of anger before committing the patient to a final disposition. At times anger originates from personal life circumstances rather than the professional workplace. Sometimes an irritating colleague inspires anger, sometimes patients themselves are angry or provoke anger. You do not need to like a patient to deliver professional and competent care, but you must rid yourself of anger and frustration to accomplish this. Learn to reserve judgement on the patients in the emergency room.

DOES THE CHART REFLECT MY THINKING?

Charting and writing progress note on patients is an essential component of emergency care.

The purpose of charting is to provide points on the curve that measure the natural history of the patient's disease. If a single measurement has been taken, a prediction of the shape and slope of the curve can be made. The emergency department record is not the lengthy text of the medical student's internal medicine work up. It is terse and pointed and contains important negatives and positives. The best way to remember what is important is to ask 'what am I seeing, and am I communicating this to someone else in the future?' For example in the infant with diarrhoea, how can one indicate the state of hydration without describing the general appearance of the baby, the presence or absence of tears, diaper wetting, skin turgor, fontanelle appearance and mucous membrane moisture? This description does not take much space or time, and when combined with the number of stools will assist in assessing the degree of hydration, and the need for admission. An error that many physicians fall into is to list every possible item in a differential diagnosis, to be "complete". List only those significant diseases that must be considered, as well as how you ruled them out in your mind. Only in this way can you draw a reasonable picture of what you are seeing and thinking.

DEALING WITH GRIEF

One of the responsibilities that the emergency physician finds the most difficult is dealing with the grief that is constantly being generated by the difficult problems of emergency medicine. Each specialty has its own unique failures, but for emergency medicine it almost certainly is the sense of failure that develops when the physician is not capable of preventing death. Physicians are so conditioned to thinking that because they can prevent some untimely deaths, they can prevent all deaths. Therefore they may think that the failure to do so is attributed to poor practice, lack of knowledge or weaknesses of the team. 

Physicians also are not taught to manage grief properly, and therefore the task is uncomfortable. They tend to avoid it by saying they are too busy or that it is the job of the pastors, social workers, nurses, or anyone other than themselves.

However, emergency physicians do have the responsibility and they can ensure that the grieving process will be healthy if they approach it correctly. If they shun the responsibility, not only do they increase the risks of making the grieving process a pathologic one, but also increase their own sense of failure, raise the prospects that their care will be held responsible for the outcome, and produce problems where they need not exist.

Many people will not believe the details of care, nor will they have an ability to form a realistic impression of how their relative or friend has died if they have not talked to the physician involved in the care. The suddenness of the illness, the lack of prior contact with the emergency staff and the emotional turmoil of needing to deal with sudden, undesired and intense loss conspire to produce a delicate balance between sadness and rage. The balance can too easily shift towards rage when the process is not understood or dealt with effectively.

The emergency physician's first responsibility is to come to terms with ones own mortality. This task is much easier for older physicians who may have experienced serious personal disease. The younger person who cannot conceive of personal mortality is much less willing to accept the reality that not all death is preventable with appropriate medical care. Many gravely ill or injured patients are being brought to the emergency department in a critical state due to improvements in pre-hospital care and the rapid transport times now being achieved. They have not completed the act of dying, and because they appear to be serious but salvageable, much anger and guilt can be induced in the emergency staff.

Each physician has particular areas of emotional vulnerability; for some it may be mutilating injury, for others death in childhood. Whatever your vulnerabilities, you can be sure to encounter them in a busy emergency department. It does help to think about those problems; to realize that other members of the team are probably experiencing similar feelings; and to realize that the hardened, cynical, apparently sophisticated façade that the more experienced members of the team seem to possess is probably a defence against emotions that threaten to be overwhelming.

If time permits, discuss emotionally troublesome cases, as well as medically difficult ones among personnel. It is sad that more emergency departments do not have a structure that permits such discussion on a regular basis.

Attempt to lessen the psychic pain of relatives or friends during a resuscitation attempt, by either the nurse or the doctor explaining the gravity of the situation whilst the attempted resuscitation is going on. Even if the relatives cannot be reached until after the event, attempt to prepare them by saying " I have some very bad news for you". Even a few moments of preparation is better than nothing. If possible, try not to inform relatives over the telephone. There is no good way to attenuate the pain other than to be direct and clear in the communication.

The experience of grief never appears to be absent, even when the patient has died from a long-term and very debilitating illness. It appears to be an almost universal human response to death.

One of the additional emotional responses to death is guilt. We often think that if we had just taken an appropriate action, we could have prevented this from happening. Deal directly with this guilt so that it will not become misdirected to other members of the family or the emergency personnel. Where doubt about guilt exists, such as in suspected child abuse, it is advisable to be non-judgmental as the emergency team rarely knows all the circumstances. Tailor the facts to each situation.

Guilt may be replaced by anger in certain circumstances and this may be misinterpreted by emergency personnel. By not understanding and by reacting negatively to the anger, the physician or nurse may cause the relative's grief and anger to be directed towards themselves. Help the relatives express their anger by allowing some time for ventilation and by carefully reinforcing that medical tasks were carried out appropriately.

In most cases, the relatives will wish to view the body, which should be done after cleaning up some of the mess of the attempted resuscitation. 

Regarding the issue of sedatives for grieving persons: these generally prolong the grieving process.

There is no "normal" response to grief; some people will experience insomnia, some sleep more; some are anorectic, others experience great hunger. If sedatives are given, these should generally be for a short duration only. The relatives should always have a contact person to whom they can go to for any major psychological problem thereafter. Relatives often express a fear that a relative who is not present is "too ill" to hear bad news. Offer to break the news and inform the relatives that one cannot hide a death forever.
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The conventional approach to patient problems involves taking a careful history, performing a careful examination and obtaining laboratory, radiological and other diagnostic results to lead to proof of a specific diagnosis. This approach does not work well in the emergency department, because the immediate problem does not involve achieving a specific disease diagnosis but rather influencing a final common pathway of patho-physiological derangement that may be identical for many different diseases. For example, respiratory failure is no different if caused by pneumonia, or fatigue in a patient with asthma. The emergency physician should make a diagnosis if possible and if helpful, but the emergency team has more important priorities than establishing a precise diagnosis.

The first responsibility is to determine which emergency patient is most ill. Patients must be assessed by someone who is not only skilled in the recognition of serious but subtle illnesses, but who also has the capacity to avoid becoming involved with the details of care. This assessment has become known as TRIAGE.

The next step is to assign the patient to a physical location within the department. Emergency personnel must learn and relearn that placing the patient in a room usually assigned to trivial problems does not mean that the patient cannot harbour serious disease. Unfortunately, once a problem is labelled as trivial, re-thinking the case in a more serious fashion is difficult. However, each member of the emergency department must constantly reassess patients to acquire more than one point on the curve of their illness.

The following is an example of a Triage Scale:

CATEGORY               DESCRIPTION                TO BE SEEN BY DOCTOR WITHIN

        1                              Resuscitation                               Immediately

        2                              Emergency                                   10 minutes

        3                              Urgent                                          30 minutes

        4                              Semi-urgent                                  60 minutes

        5                               Non-Urgent                                  2 hours


Three components are necessary for triage and identification of the life-threatened patient.

a)           A chief complaint

b)           A complete set of vital signs in the field and in the emergency department

c)           An opportunity to visualize, touch, and auscultate the patient

The chief complaint, which sometimes cannot be obtained directly from the patient but must be obtained from family members and others, will help categorize the general type of problem (e.g. cardiac, traumatic, respiratory etc).

Vital signs are the most reliable, objective data that are immediately available to emergency department personnel. Vital signs and the chief complaint, when used as triage tools, will identify the majority of life threatened patients. It is essential to be totally familiar with normal vital signs for all age groups. Age, underlying physical condition, medical problems and current medications (e.g. beta blockers) are important considerations in determining normal vital signs for a patient. For example, a well conditioned young athlete who has just sustained major trauma and arrives with a resting, supine pulse of 80 must be presumed to have significant blood loss because his normal pulse is probably in the 40-50 range.

Most pre-hospital care systems with a level of care beyond basic transport also provide therapy to patients. Because this therapy usually makes positive changes to the patient's condition, the patient may look deceptively well on arrival in the emergency department. For example, a 20 year old female with acute onset of left lower quadrant abdominal pain, who is found to be cool and clammy, with a pule rate of 116 and a blood pressure of 78 palpable and who receives 1500 cc of fluid en route to the emergency department, may arrive with normal vital signs and no skin changes. If one does not read or pay attention to the paramedic's description of the patient and the initial vital signs, the presumption could be made that all is well.

Sometimes normal vital signs are not normal. For example, a 20 year old asthmatic patient has a respiratory rate of 14. An asthmatic patient who is dyspnoeic and wheezing should have a respiratory rate of at least 20-30/min. The "normal" respiratory rate of 14 in this setting indicates that the patient is in respiratory failure. This is a classic example of where normal is not normal.

Visualizing, touching and auscultating helps to identify the threat to life i.e. is it the upper airway, lower airway or circulation? Touching the skin is important to determine whether shock is associated with vasoconstriction (hypovolaemic or cardiogenic) or with vasodilatation (septic, neurogenic or anaphylactic). Auscultation will identify threats associated with lower airway (eg. bronchospasm, tension peumothorax).

In conclusion, obtain the vital signs on every patient without exception. It cannot be stressed enough the need for accurate temperature determination especially in young children. Doctors often overlook temperature determination in adults, resulting in delay in perceiving the magnitude of problems or in beginning appropriate interventions. It is difficult to understand why so many doctors pay little attention to vital signs and then face the unhappy task of trying to explain away abnormalities that should have provided clues to the seriousness of the patient's problems. Although a patient can be seriously ill with what appears to be normal vital signs and may not be seriously ill with abnormalities of the same, it is best to believe abnormal vital signs in patients who appear ill, because changes in vital signs may provide clues to worsening in a patient's condition.
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Perhaps more than any other specialty, emergency medicine interfaces with outside agencies and specialties; management is always based on a team approach to care. The emergency medical system interfaces with police, firefighters, news media, transportation authorities, disaster planning agencies etc. Within the emergency department, patient care is provided by a team of professionals, including nursing staff, radiographers, pharmacists, blood bank and clinical laboratory personnel, social workers etc. 
The emergency doctor must rely on medical colleagues for consultation, post admission care, and post discharge follow-up care. 
The overall orchestration of personnel and resources for the immediate care of acutely ill or injured patients is the responsibility of the emergency doctor, until the evaluation shows that the patient can be formally transferred to another physician or service.


PREHOSPITAL CARE

Outside of the hospital situation, there is a clear organizational hierachy
The police are in overall control of the situation.
The fire service is in control of rescue and extrication
The ambulance service is responsible for evacuation of casualties
The medical team is present at the request of the ambulance team
Entrapment of casualties is now the most common reason for paramedics to request the assistance of a medical team - either prolonged entrapment or situations where analgesia is required.

An on site medical team must be formed from experienced staff who have high visibility protective clothing, adequate equipment and insurance for this type of work. However this is not always possible in rural and other underserviced areas.
A recent concept that is believed to improve overall outcome during disasters is the Incident Command System. Such a system is based on the philosophy that various sectors (triage, communications, transportation) are under the command of a single authority that can provide adequate control. The purpose of such a system is to reduce the amount of time and precious resources wasted on patients who do not need them (minor injuries) or will not benefit from them (victims of unsurvivable injuries, given the setting). 
The incident command system provides a structure that can prevent the misuse of resources (such as transporting patients before triage occurs).
Triage means "to sort". Although numerous systems exist for triaging accident victims, the basic concept identifies four groups of patients:
a) minor illness or injury (walking wounded)
b) serious but not life threatening illness or injury (such as a patient with intra abdominal injury who is currently not in shock)
c) critical or immediately life threatening illness or injury
d) dead or unsalvageable. The actual categorization is different in various types
and magnitudes of disaster. Thus a critically injured patient who might receive the benefit of a comprehensive life saving effort in a three patient incident might be deemed unsalvageable in a disaster with a thousand victims.

The quality of medical care is directly related to the experience of personnel. A disaster has been defined as "many people trying to do quickly what they do not ordinarily do in an environment with which they are familiar". No matter how experienced an individual is, the level of care, resources available, and entire framework for resource management undergo major alterations during a disaster. Thus the development of a clear plan for the management of multiple casualties is imperative to ensure optimal outcome for the victims, given the resources available. Disaster planning must not be seen in a vacuum, but rather must include relevant agencies within the community, such as police and fire departments, ambulance team, communications and hospitals. No matter how well prepared a trauma centre might be to care for multiple casualties, if the transportation of disaster victims is disrupted or misdirected, patient outcome is adversely affected.

The only measures that have been shown conclusively to save lives in the pre-hospital situation are ABC:
Airway                Clearance, maintenance and protection
Breathing            Oxygenation and ventilation
Circulation          Chest compression and defibrillation
Extensive clinical examination and the establishment of IV infusions are of no proven benefit. However, other pre-hospital treatments may contribute greatly to the relief of pain and suffering.

Time at the scene must not be extended by anything other than essential treatment. The priority is to get the patient to the hospital as soon as possible. The basic principles of pre-hospital care are the same as those for in hospital care. Specific resuscitation courses are now available where the applied skills may be mastered. The general practitioner is sometimes called away by patients, relatives, nurses, police or others to attend to emergencies. The lay concept of what constitutes an emergency
includes not only physical problems, but also emotional and social. The general practitioner needs to understand the patient's feeling of urgency and reassurance may not always be simple, but can require great skill and understanding. Despite this, the general practitioner must be available and organized to cope with the medically defined emergency when it comes. Emergency care outside the hospital represents one of the most interesting and rewarding areas of medical practice. City doctors will have to modify their degree of availability, equipment and skills according to paramedical emergency services, while others, especially remote doctors, will need total expertise and equipment to provide optimal circumstances to save patients lives.
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In the United States, residents must complete a minimum training period of 36 months in an approved emergency medicine training residency programme before they can sit the Board examination. A typical residency curriculum includes the following assignments:

emergency medicine, intensive care units, paediatrics, trauma surgery, toxicology, orthopaedics, neurology/neurosurgery, obstetrics and gynaecology, emergency medical services and electives.

The necessary technical skills and knowledge are acquired during residency training and in practice, and are published in texts that outline relevant procedures. Such skills include, but are not limited to, airway control, venous access, diagnostic procedures, pericardiocentesis and thoracocentesis.

South Africa is in the process of developing a full postgraduate specialist training programme, in addition to the Diploma in Emergency Medicine that is presently available. Many doctors have taken the opportunity to complete the excellent certification programmes available eg Acute Trauma Life Support, Acute Cardiac Life Support and Lecture Notes on Emergency Medicine

Acute Paediatric Life Support. These certification courses have done much to stimulate the interest of many who are involved in emergency care.
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Tuesday, 28 July 2015





The history of emergency medicine as a distinct medical discipline encompasses the past 60 years. The genesis of emergency medicine involved several elements and stemmed from recognition of the unique nature of trauma care and emergency transport, increasing mobility of the population and improvements in emergency care and resuscitation. 
The American Board of Emergency Medicine became the twenty-third medical specialty, following its approval by the American Board of Specialties in September 1979. The first board examination in emergency medicine was offered in 1980.

In the early 1980's, the Australian Society of Emergency Medicine was formed by a group of doctors committed to the practice and development of emergency medicine, and in 1993 the discipline was accepted as a principal specialty. 
These developments have led to the transformation in the practice of emergency medicine in most hospitals. However, away from the major centres, there are many non-specialist doctors playing an important role in the delivery of emergency care to seriously ill patients. These doctors often do so in relative isolation and without the benefit of the supervision and back up of specialists. Groups such as rural general practitioners and hospital based medical officers carry a significant emergency medicine role
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