Tuesday, October 18, 2016

In Macbeth, what are the three reasons for his reluctance to kill Duncan?

Macbeth is reluctant to kill King Duncan for a number of reasons.  First, he is Duncan's relative and his subject.  Macbeth's duty is to love and defend his kinsman and his king.  Next, he is Duncan's host, who should, he says, "against [Duncan's] murderer shut the door" and not carry the murder weapon himself (1.7.15).  Next, he says, Duncan is an incredibly good person and king; he has been a humble leader, so untainted by any kind of corruption, that the loss all of his great virtues will be too upsetting to everyone in the kingdom and the tears of Duncan's subjects will flow too much. 


Earlier in this same soliloquy, Macbeth also mentions the idea that there will be terrible consequences for himself and his soul if he commits this awful act.  He wishes that it were possible to simply commit the murder and not have to deal with any such consequences.  Further, he fears that if he kills the king and proves that such a thing can be done, others could come and do the same thing to him.

How do people cope with chronic illness?


Introduction

In modern times, chronic illnesses are becoming increasingly common. In the twenty-first century, the leading causes of death in the United States are chronic diseases, as opposed to the beginning of the previous century, when infectious diseases were more rampant. Chronic illnesses are diseases that are long in duration, have multiple risk factors, have a long latency period, are usually noncontagious, cause greater and progressive functional impairment, and are generally incurable. Examples of common chronic illnesses include heart diseases (such as coronary heart disease and hypertension), cancers (malignant neoplasms), chronic obstructive lung diseases (bronchial asthma, emphysema, and chronic bronchitis), cerebrovascular diseases (stroke), diabetes mellitus, kidney diseases (end-stage renal disease and renal failure), musculoskeletal disorders (rheumatoid arthritis and osteoarthritis), chronic mental illnesses, neurological disorders (epilepsy, Alzheimer’s disease, Parkinson’s disease, and multiple sclerosis), and some of the results of accidents or injuries (traumatic brain injury, spinal cord injury, amputations, and burns). Dealing with these illnesses presents numerous challenges for patients and their family members and care providers. “Coping” is a term that is usually used to describe the process by which people manage demands in excess of the resources that are at their disposal. Therefore, in addition to medical treatment, management of chronic illnesses must address lifelong coping with these illnesses.














The interest in coping with chronic illnesses can be traced back to late 1960s, with the work of American physician Thomas Holmes and Richard Rahe, then a medical student, at the University of Washington. They constructed the Social Readjustment Rating Scale (SRRS) to assess the amount of stress to which an individual is exposed. Personal injuries or illnesses were rated as the sixth-most-important events in terms of their intensity in affecting one’s life and increasing the chances of further illness in the subsequent year of life.




Models of Coping

American psychologist Franklin Shontz, in his book The Psychological Aspects of Physical Illness and Disability (1975), described the phases of reaction to any illness. The first stage on being diagnosed with a chronic illness is what he described as the stage of shock, in which the person is in a bewildered state and behaves in an automatic fashion with a sense of detachment from all surroundings. In this stage, patients often describe themselves as observers rather than participants in what is happening around them. The second stage is the stage of encounter or reaction. In this stage, the person is feeling a sense of loss and has disorganized thinking. Emotions of grief, despair, and helplessness are common. In this stage, patients often describe the feeling of being overwhelmed by reality. The third stage is what Shontz calls retreat. In this stage, the feeling of denial becomes very strong, but this state cannot persist and the patient gradually begins to accept reality as the symptoms persist and functional impairments ensue.


In the 1980s, American psychologist Richard Lazarus, an emeritus professor at the University of California at Berkeley, proposed the famous coping model called the transactional model. This model has also been applied widely in understanding coping with chronic illnesses. According to the transactional model, all stressful experiences, including chronic illnesses, are perceived as person-environment transactions. In these transactions, the person undergoes a four-stage assessment known as appraisal. When confronted with a diagnosis of chronic illness, the first stage is the primary appraisal of the event. In this stage, the patient internally determines the severity of the illness and whether he or she is in trouble. If the illness is perceived to be severe or threatening, has caused harm or loss in the past, or has affected someone known to the person, then the stage of secondary appraisal occurs. If, on the other hand, the illness is judged to be irrelevant or poses minimal threat, then stress does not develop and no further coping occurs. The secondary appraisal determines how much control one has over the illness. Based on this understanding, the individual ascertains what means of control are available. This is the stage known as coping. Finally, the fourth stage is the stage of reappraisal, in which the person determines whether the effects of illness have been negated.


According to the transactional model, there are two broad categories of coping. The first one is called problem-focused coping, and the second one is called emotion-focused coping. Problem-focused coping is based on one’s capability to think about and alter the environmental event or situation. Examples of this strategy at the thought-process level include utilization of problem-solving skills, interpersonal conflict resolution, advice seeking, time management, goal setting, and gathering more information about what is causing one stress. Problem solving requires thinking through various solutions, evaluating the pros and cons of different solutions, and then implementing a solution that seems most advantageous to reduce the stress. Examples of this strategy at the behavioral or action level include activities such as joining a smoking-cessation program, complying with a prescribed medical treatment, adhering to a diabetic diet plan, or scheduling and prioritizing tasks for managing time.


In the emotion-focused strategy, the focus is inward and on altering the way one thinks or feels about a situation or an event. Examples of this strategy at the thought-process level include denying the existence of the stressful situation, freely expressing emotions, avoiding the stressful situation, making social comparisons, or minimizing (looking at the bright side of things). Examples of this strategy at the behavioral or action level include seeking social support to negate the influence of the stressful situation; using exercise, relaxation, or meditation; joining support groups; practicing religious rituals; and escaping through the use of alcohol and drugs.




Crisis Theory of Coping

In the 1980s, American psychologist Rudolf Moos proposed the crisis theory to describe the factors that influence the crises of illnesses. He identified three types of factors that influence the coping process in illness. The first category of factors comprises the illness-related factors. The more severe the disease in terms of its threat, the harder is the coping. Examples of such severe threats include conditions such as burns that are likely to produce facial disfigurement, implantation of devices for excreting fecal or urinary wastes, or epileptic seizures. The second category of factors comprises background and personal factors. These factors include one’s age, gender, social class, religious values, emotional maturity, and self-esteem. For example, men are often affected more if the illness threatens their ambition, vigor, or physical power, while children show greater resilience because of their relative naïveté and limited cognitive abilities. The third category of factors identified by Moos comprises physical and social environmental factors. Generally speaking, people who have more social support tend to cope better when compared to people who live alone and do not have many friends.


Moos proposed in his crisis theory that these three factors impinge on the coping process. The coping process begins with cognitive appraisal, in which the patient reflects on the meaning of the illness in his or her life. This leads to formulating a set of adaptive tasks. Moos identified three adaptive tasks for coping directly with the illness: dealing with the symptoms and functional impairment associated with the illness or injury, adjusting to the hospital environment or medical procedures, and developing relationships with care providers. He further identified four adaptive tasks as crucial for adapting to general psychosocial functioning: maintaining a sense of emotional balance and controlling negative affect; preserving a sense of mastery, competence, or self-image; sustaining meaningful relationships with friends and family; and preparing for a future of uncertainty. The family members or long-term care providers who work with such patients also undergo these seven adaptive processes and must make these adjustments for effective coping. These adaptive tasks usually result in specific coping strategies. Moos described the following coping strategies: denial, or minimizing the seriousness of the illness (which is sometimes helpful, especially in the earlier stages); seeking information; learning medical procedures (which is sometimes helpful for self-care, such as taking insulin shots); mastering adaptive tasks; recruiting family support; thinking about and discussing the future to decipher greater predictability; and finding a purpose in and positive impacts of the illness on one’s life.




Heart Diseases

Heart diseases or cardiovascular diseases have been the leading cause of death in the United States since the 1980s. Initial research on coping with heart disease was done on patients with myocardial infarction, or heart attack. The research focused mainly on the role played by denial, which is a defense mechanism, described by the famous Austrian neurologist
Sigmund Freud, who is also called the father of psychoanalysis. Researchers using the “denial scale” classified patients into “denying” and “nondenying” groups and studied the outcomes of recovery. It was found that denial played an important role in decreasing anxiety and even in reducing deaths in the early stages of heart attack recovery. However, during the later phases of recovery, denial added to noncompliance with medical care, decreased seeking of information about the disease, and increased the risk of recurrence of heart attack. Research comparing the specific role of repression (or denial) and sensitization to the presence of disease supports the importance of sensitization in improving the solicitation of information, social functioning, and outcomes through the reduction of complications.


Recent research on coping and heart diseases has broadened its focus, improved coping measurement tools, and studied several other dimensions of coping. The first of these dimensions is the comparison between problem-focused strategies and emotion-focused strategies as described by Lazarus. In general, it has been found that people who use a problem-focused coping strategy report better social and psychological adjustment following hospital discharge, and these approaches are beneficial in the long run for improving disease outcomes. Emotion-focused strategies have been found to be of some utility in the short term in decreasing distress but have not been found to be useful in the long term. Further, people using emotion-focused strategies have reported greater incidence of anxiety and depression as a result of the heart disease.


Another dimension of coping that researchers have studied pertains to optimism. American psychologist Charles S. Carver and his colleagues have found the beneficial effects of being optimistic when recovering from chronic heart disease. Similarly, researchers have found empirical evidence of what American psychologist Suzanne Kobasa described as hardiness, a term that comprises the trinity of control, commitment, and challenge, as being beneficial in improving psychosocial adjustment to heart disease and decreasing chances of anxiety and depression.




Cancers

Cancers are a diverse group of diseases characterized by the uncontrolled growth and spread of abnormal cells in the body. At the start of the twenty-first century, cancers were the second leading cause of death in the United States. The lifetime probability of developing cancer was estimated at one in three, and it was estimated that cancers would soon be the leading cause of death and sickness. Cancers pose special challenges for coping, as these necessitate utilization of a wide range of coping options to deal with changing and often deteriorating functional abilities, medical challenges, treatment modalities (chemotherapy, surgery, and radiotherapy), and psychosocial reactions.


Like the earlier studies on coping with heart diseases, initial work on coping with cancers also focused on the role of defense mechanisms described by Freud. More recent research on coping and cancers has focused on personal disposition styles, coping strategies as described by Lazarus, and other special mechanisms. Results from disposition style studies suggest that internal locus of control and optimistic outlook are linked to lower levels of emotional distress and better psychological adaptation to cancer. On the other hand, avoidance or escapism has been associated with higher emotional distress. Problem-based coping strategies, as described by Lazarus, have also been found to be associated with better psychosocial adaptation to cancer. On the other hand, disengagement-oriented strategies such as wishful thinking, blaming oneself, and adopting a fatalistic or resigned attitude have been found to be associated with higher levels of emotional distress and worse psychosocial adaptation to cancer. Likewise, acceptance of the diagnosis of cancer and resignation to this fact have also been found to be associated with worse psychosocial outcomes. Other coping strategies such as freely expressing feelings, denial, and seeking religion have yielded equivocal results.




Cerebrovascular Diseases

In 2011, cerebrovascular disease (CVD) was the fourth leading cause of death in the United States and represented about 5 percent of deaths from all causes, according to the US Centers for Disease Control and Prevention (CDC). The most severe manifestation of CVD is stroke, with transient ischemic attack being a less severe clinically apparent variant. Stroke is a major cause of disability. Besides the usual generalized coping that goes with any chronic illness, coping with stroke specifically requires speech therapy, occupational therapy, and physiotherapy.




Diabetes

Diabetes mellitus is a disease in which the body is unable to sufficiently produce and/or properly use insulin, a hormone needed by the body to use glucose. The prevalence of this disorder has consistently risen in the United States, and as of 2013, it afflicted about 10 percent of the population, according to the American Diabetes Association. Besides the usual generalized coping that goes with any chronic illness, coping with diabetes specifically requires lifelong dietary changes, changes pertaining to physical activity patterns, and, in most cases, specific medicinal usage and compliance.




Chronic Respiratory Disorders

Chronic lung diseases are a varied group of diseases that were, in 2011, identified as the third leading cause of death in the United States. According to the CDC, as of 2013, approximately fifteen million Americans reported being diagnosed with one of these disorders. The most common chronic respiratory disorders are asthma, emphysema, and chronic bronchitis. Besides the compliance to medical treatment and the usual generalized coping that goes with any chronic illness, coping with respiratory disorders entails gradual buildup of exercise stamina and effective management of stress through relaxation techniques, since many acute attacks are both exaggerated and precipitated by stress.




Chronic Musculoskeletal Disorders

Arthritis and musculoskeletal disorders were the most common causes of physical disability in the United States in 2013, affecting approximately 20 percent of the population, according to the CDC. Besides the usual generalized coping that goes with any chronic illness, these disorders require specific rehabilitative coping through physiotherapy, occupational therapy, and vocational rehabilitation.




Chronic Mental Illnesses

Poor and ineffective coping with stress often leads to persistent depression and anxiety. Besides these two common mental illnesses, other disorders such as schizophrenia, bipolar psychosis, variants of anxiety disorders, organic disorders (such as dementia and Alzheimer’s disease), and other mental illnesses pose special coping challenges for patients and their family members. Besides the usual coping strategies, coping with mental disorders specifically involves long behavioral, psychological, and social challenges and therapies.




Bibliography


Allen, Jon G. Coping with Trauma. 2d ed. Washington: American Psychiatric P, 2005. Print.



Clark, Cindy Dell. In Sickness and in Play: Children Coping with Chronic Illness. New Brunswick: Rutgers UP, 2003. Print.



Di Benedetto, Mirella, et al. "Co-Morbid Depression and Chronic Illness Related to Coping and Physical and Mental Health Status." Psychology, Health & Medicine 19.3 (2014): 253–62. Print.



Helgeson, Vicki S., and Kristin Mickelson. “Coping with Chronic Illness Among the Elderly: Maintaining Self-Esteem.” Behavior, Health, and Aging. Ed. Stephen B. Manuck, Richard Jennings, Bruce S. Rabin, and Andrew Baum. Mahwah: Erlbaum, 2000. Print.



Livneh, Hanoch. “Psychosocial Adaptation to Cancer: The Role of Coping Strategies.” Journal of Rehabilitation 66.2 (2000): 40–50. Print.



Livneh, Hanoch. “Psychosocial Adaptation to Heart Diseases: The Role of Coping Strategies. ” Journal of Rehabilitation 65.3 (1999): 24–33. Print.



McCabe, Marita P., and Elodie J. O'Connor. "Why Are Some People with Neurological Illness More Resilient Than Others." Psychology, Health & Medicine 17.1 (2012): 17–34. Print.



Moos, Rudolf H., ed. Coping with Life Crises: An Integrated Approach. New York: Plenum, 1986. Print.



Nabors, Laura A., et al. "Factors Related to Caregiver State Anxiety and Coping with a Child's Chronic Illness." Families, Systems & Health: The Jour. of Collaborative Family HealthCare 31.2 (2013): 171–80. Print.



Romas, John A., and Manoj Sharma. Practical Stress Management: A Comprehensive Workbook for Managing Change and Promoting Health. 5th ed. San Francisco: Pearson/Benjamin Cummings, 2009. Print.

Why is a reaction between sodium bicarbonate and acetic acid quicker than a reaction between calcium carbonate and acetic acid?

When acetic acid reacts with sodium bicarbonate, the following reaction takes place:


`CH_3COOH + NaHCO_3 -> CH_3COONa + H_2O + CO_2`


When acetic acid reacts with calcium carbonate, the resulting reaction can be expressed as:


`2CH_3COOH + CaCO_3 -> (CH_3COO)_2Ca + H_2O + CO_2`


In both the cases, we can see that the metal ion (sodium and calcium) is dissociated from the anionic group and this cation reacts with the acetate group to form the respective salt. 


Sodium bicarbonate reacts faster, in comparison to calcium carbonate, since there is an exchange of only 1 electron between the sodium ion and bicarbonate ion. In comparison, two electrons are donated and accepted in the case of calcium carbonate. Thus, it is easier for sodium bicarbonate to dissociate and react with the acid.


Both sodium bicarbonate and calcium carbonate are used in antacids (drugs to relieve stomach acidity) and react with hydrochloric acid.


Hope this helps. 

Monday, October 17, 2016

What kind of narrator does James Thurber use in "The Secret Life of Walter Mitty"?

In the story, and this includes Walter's daydreams, the author uses a third person narrator. Using this point of view, the narrator refers to each character as he, she, it, they, etc. "I" is used in first person narration and "you" is used in second person narration. 


Using third person narration, the author has the position of being outside the story. He (the narrator) has a privileged position in that he can describe events from any perspective. He can also describe things in a particular character's mind. This is clearly what is going on with Walter Mitty. 


The narrator is able to go back and forth in describing events in the external world and Walter's daydreams. It would be interesting to consider this story from Walter's perspective (first person), but that might not work because Walter prefers the life of his own mind. In other words, had the story been told by Walter, he could have eliminated any external events or even the nagging of his wife. So, it is possible that Thurber chose third person narration to make the transitions from external to internal (Walter's mind) more significant and pertinent to the story. We need to see how Walter absentmindedly goes through his life as he is distracted by his own daydreams, and this is effectively shown with the narrator's distance from the world of the story.

Sunday, October 16, 2016

When the Book of Genesis (4:26) says that “men began to call upon the name of the Lord,” what does it mean?

The question asks for an explication of Genesis (Chapter 4: Verse 26) from the Bible. The full verse is “and to Seth, to him also was born a son; and he called him Enos: then men began to call upon the name of the LORD.” (KJV; other translations are similar.)


 Explication of specific Bible verses always requires an understanding of the context for the verse in question. At a minimum, this means the other Bible verses leading up to that one, as well as verses which the author of that verse may be assumed to have been familiar with which would have informed their understanding in writing the specific verse. Given that the specific (human) author of Genesis is not known, nor the specific geographic or chronological context in which they recorded it, we can only incorporate the context of the rest of Genesis preceding this verse. Ultimately, interpretation can be a highly personal thing.


 The story of Genesis up to this point is the story of the initial creation, and Adam and Eve’s fall from direct relationship with God. By Book 4 of Genesis, they have been cast out of Eden, and have begun procreating. Cain has killed his brother Abel, and Adam and Eve have conceived Seth, ostensibly to replace Abel. Seth in turn sires Enos. Prior to this point, there is no record of Adam or his lineage “calling upon the name of the Lord,” which is to ask the Lord for help. More generally, calling upon the name of the Lord could be interpreted as taking the first step in establishing a relationship with God. Therefore, one could interpret this verse as saying that with the birth of Enos, humanity began the process of reconnecting or reestablishing the direct relationship with God that was lost when Adam ate of the forbidden fruit in the garden of Eden.

In To Kill a Mockingbird, how does the trial change Atticus?

Atticus is disappointed when Tom Robinson is convicted and then kills himself trying to escape prison.  He knew that he was never going to win the case, but it affects him just the same.  Although Atticus explains to his children that the case is almost unwinnable, he also tried his best and really tried to make a difference for Maycomb.  


Atticus realized that acquitting Tom Robinson, despite the lack of evidence, would be very hard for the jury.  He still tried to explain to them why they should.  He may have given one of the most important closing statements of his career. 


Atticus explained to the jury that there are good men and bad men, regardless of race.  He reminded them that there was no evidence to prove that a crime even took place, and he had proved that Mayella’s injuries could not have come from Tom.  He also showed what Mayella’s home life was like, and how her father most likely was the one who beat her up. 



“…A court is only as sound as its jury, and a jury is only as sound as the men who make it up. I am confident that you gentlemen will review without passion the evidence you have heard, come to a decision, and restore this defendant to his family. In the name of God, do your duty.” (Ch. 20) 



Atticus earned the respect of the black community, and also that of others who felt that racism had seen its day.  The case took its toll on his family though.  Although Atticus did not take Bob Ewell’s threat seriously, his children were scared.  The ultimate effect was when Ewell attacked his children, injuring Jem and possibly doing worse if Boo Radley had not intervened. 


By this time, Atticus is clearly worn down.  He thinks about the impact it will have on Jem, but Heck Tate decides that they should say that Bob Ewell fell on his knife.  This prevents either Jem or Boo Radley from taking responsibility. 



“I’m not a very good man, sir, but I am sheriff of Maycomb County. … Know everything that’s happened here since before I was born. There’s a black boy dead for no reason, and the man responsible for it’s dead. Let the dead bury the dead this time, Mr. Finch. Let the dead bury the dead.” (Ch. 30) 



Atticus thanks Boo Radley for saving his children.  Scout walks Boo home, and reflects on the events of her childhood.  The events of the book are Scout’s story, but they are also Atticus’s.

What is a coma?


Causes and Symptoms

Consciousness is defined by the normal wakeful state, with its self-aware cognition of past events and future anticipation. Disease or dysfunction that impairs this state usually causes readily identifiable conditions such as coma. The self-aware, cognitive aspects of consciousness depend largely on the interconnected neural networks of the cerebral hemispheres. Normal conscious behavior depends on the continuous, effective interaction of these systems. Loss of consciousness from medical causes can be brief (a matter of minutes to an hour or so) or it can be sustained for many hours, days, or sometimes even weeks. The longer the duration of the comatose state, the more likely it is to reflect structural damage to the brain rather than a transient alteration in its function.


The word “coma” comes from the Greek koma, meaning to put to sleep or to fall asleep. This state of unarousable unresponsiveness results from disturbance or damage to areas of the brain involved in conscious activity or the maintenance of consciousness—particularly parts of the cerebrum (the main mass of the brain), upper parts of the brain stem, and central regions of the brain, especially the limbic system. A wide spectrum of specific conditions can injure the brain and cause coma. The damage to the brain may be the result of a head injury or of an abnormality such as a brain tumor, brain abscess, or intracerebral hemorrhage. Often there has been a buildup of poisonous substances that intoxicates brain tissues. This buildup can occur because of a drug overdose, advanced kidney or liver disease, or acute alcoholic intoxication. Encephalitis (inflammation of the brain) and meningitis (inflammation of the brain coverings) can also cause coma, as can cerebral hypoxia (lack of oxygen in the brain, possibly attributable to the impairment of the blood flow to some areas). Whatever the underlying mechanism, coma indicates brain failure, and the organization of cerebral biochemical systems has been disrupted. Coma is easily distinguishable from sleep in that the person does not respond to external stimulation (such as shouting or pinching) or to the needs of his or her body (such as a full bladder).


Comas are classified according to the event or condition that caused the comatose state. Some of the most frequently encountered types of comas are traumatic coma, alcoholic coma, apoplectic coma, deanimate coma, diabetic coma, hepatic coma, metabolic coma, vigil coma, pseudo coma, and irreversible coma. Traumatic coma follows a head injury. It has a somewhat more favorable outcome than that of comas associated with medical illness. About 50 percent of patients in a coma from head injuries survive, and the recovery is closely linked to age: The younger the patient, the greater the chance for recovery. Alcoholic coma refers to the coma accompanying severe alcohol intoxication, usually more than 400 milligrams of alcohol per 100 milliliters of blood. This coma is marked by rapid, light respiration, usually with tachycardia and hypotension. Apoplectic coma is induced by cerebral, cerebellar, or brain-stem hemorrhage, as well as by embolism or cerebral thrombosis. The term “deanimate coma” refers to a deep coma with loss of all somatic and autonomic reflex activity. The maintenance of life depends wholly upon such supportive measures as assisted respiration, and cardiac arrest will quickly follow if the respirator is stopped; this may be a transient or irreversible state. Diabetic coma is the coma of severe diabetic acidosis. Hepatic coma is the coma accompanying cerebral damage resulting from degeneration of liver cells, especially that associated with
cirrhosis of the liver. “Metabolic coma” is the term applied to the coma occurring in any metabolic disorder in the absence of a demonstrable macroscopic physical abnormality of the brain. Vigil coma is defined as a state of stupor in which the patient is mute and shows no verbal or motor responses to stimuli although the eyes are open and give a false impression of alertness. Pseudo coma refers to states resembling acute unconsciousness but with self-awareness preserved. Irreversible coma, or brain death, occurs when the brain damage is so extensive that the organ enjoys no potential for recovery and can no longer maintain the body’s internal functions without life support.




Treatment and Therapy

Of the acute problems in clinical medicine, none is more difficult than the prompt diagnosis and effective management of the comatose patient. The difficulty exists partly because the causes of coma are so many and partly because the physician possesses only a limited time in which to make the appropriate diagnostic and therapeutic judgment.


Measurements of variations in the depth of coma are important in its assessment and treatment. In less severe forms, the person may respond to stimulation by, for example, moving an arm. In severe cases, the person fails to respond to repeated vigorous stimuli. Yet even deeply comatose patients may show some automatic responses, as they may continue to breathe unaided or may cough, yawn, blink, or show roving eye movement. These actions indicate that the lower brain stem, which controls these responses, is still functioning.


Assessment of the patient in a coma includes an evaluation of all vital signs, the level of consciousness, neuromuscular responses, and the reaction of the pupils to light. In most hospitals, a printed form for neurologic assessment is used to measure and record the patient’s responses to stimuli in objective terms. The Glasgow coma scale also provides a standardized tool that aids in assessing a comatose patient and eliminates the use of ambiguous and easily misinterpreted terms such as “unconscious” and “semicomatose.” Additional assessment data should include evaluation of the gag and corneal reflexes. Abnormal rigidity and posturing in response to noxious stimuli indicate deep coma.


The definitive treatment of altered states of consciousness requires removing, correcting, or halting the specific process responsible for the state to whatever degree possible. Often, accurate diagnosis and specific therapy require time, and the first priority is to protect the brain from permanent damage.


General treatment measures that apply to all patients include the following: assurance of an adequate airway passage and oxygenation; maintenance of proper circulation; intravenous administration of glucose or thiamine if the patient is undernourished; any measures necessary to stop generalized seizures; the restoration of the blood acid-base and osmolar balance; the treatment of any detected infection; the treatment and control of extreme body temperatures; the administration of specific antidotes for situations such as drug overdoses; control of agitation; and the protection of the corneas.


In the absence of the gag reflex, regurgitation and aspiration are potential problems. Tube feeding, if necessary, must be done slowly and with the head of the bed raised during the feeding and for about half an hour later. Absence of the corneal reflex can inhibit blinking and natural moistening of the eye. The cornea cannot be allowed to dry, since blindness can result; therefore, artificial tears are instilled in the eyes to keep them moist.


Once the cause of the comatose state has been determined, the appropriate steps should be taken to minimize or eliminate it whenever possible. For many causes of coma, rapid intervention and treatment can mean recuperation for the patient, such as in the cases of diabetes, removable hematomas, and drug overdose.


Comatose patients are predisposed to all the hazards of immobility, including impairment of skin integrity and the development of ulcers, contractures and joint disabilities, problems related to respiratory and circulatory status, and alterations in fluid and electrolyte balance. All these factors must be taken into consideration when dealing with the comatose patient.


The outcome from severe medical coma depends on its cause and, with the exception of depressant drug poisoning, on the initial severity and extent of neurologic damage. Depressant drug poisoning reflects a state of general anesthesia, and, barring severe complications, almost all patients who survive drug intoxication can recover physically.


The clinical tests most valuable for estimating the capacity for recovery after medical coma are identical to those used in making the initial diagnosis. Within a few hours or days after the onset of coma, many patients show neurologic signs that can differentiate, with a high probability, the future extremes of either no improvement or the capacity for good recovery. After a period of about six hours (except for patients on drugs), certain neurological findings begin to correlate with the potential for neurologic recovery and can predict the outcome of about one-third of patients who will not recover. By the end of the first day, tests can predict the two-thirds of the patients who will do well. With each successive day, the signs develop greater predictive power. Persistence of coma in an adult for more than four weeks is almost never associated with later complete recovery.




Perspective and Prospects

Attempts to define “coma” must give at least brief consideration to the concepts of consciousness. Consciousness involves not only the perception of stimuli but also the emotional implications of such stimuli, as well as the construction of intricate mental images.


Since the days of the ancient Greeks, people have known that normal conscious behavior depends on intact brain function and that disorders of consciousness are a sign of cerebral insufficiency. The range of awake and intelligent behavior is so rich and variable, however, that clinical abnormalities are difficult to recognize unless there are substantial deviations from the norm. Impaired, reduced, or absent conscious behavior implies the presence of severe brain dysfunction and demands urgent attention if recovery is to be expected. The brain can tolerate only a limited amount of physical or metabolic injury without suffering irreparable harm, and the longer the failure lasts, the narrower the margin between recovery and the development of permanent neurologic invalidism.


Since such researchers as Pierre Mollaret and Maurice Goulon first examined the question in 1959, many others have tried to establish criteria that would accurately determine that the brain is dead or about to die, no matter what therapeutic measures one undertakes. In 1968, the Harvard Medical School Ad Hoc Committee to Examine the Definition of Brain Death established criteria for determining irreversible coma, or brain death. These criteria are often used to complement the traditional criteria for determining death. All other existing guidelines, such as the Swedish, British, and United States Collaborative Study Criteria, include nearly identical clinical points but contain some differences as to the duration of observation necessary to establish the diagnosis as well as the emphasis to be placed on laboratory procedures in diagnosis.


Techniques such as computed tomography (CT) scanning, electroencephalography (EEG), and functional magnetic magnetic resonance imagery (fMRI) have transformed the process of diagnosis in clinical neurology, with technology sometimes replacing clinical deduction. The art of diagnosis, however, is to comprehend the whole picture—where the lesion is, what it comprises, and above all, what it is doing to the patient.


Advances in resuscitative medicine have made obsolete the traditional clinical definition of death, that is, the cessation of heartbeat. Cardiac
resuscitation can salvage patients after periods of asystole lasting up to several minutes. Cardiopulmonary bypass machines permit the patient’s heartbeat to cease for several hours with full clinical recovery after resuscitation. While respiratory depression formerly meant death within minutes, modern mechanical ventilators can maintain pulmonary oxygen exchange indefinitely. Such advances have permitted many patients with formerly lethal cardiac, pulmonary, and neuromuscular disease to return to relatively full and healthy lives. Abundant clinical evidence, however, demonstrates that severe damage to the brain can completely destroy the organ’s vital functions and capacity to recover, even when the other parts of the body still live. The result has been to switch the emphasis in defining death to a cessation of brain function. Brain death occurs when brain damage is so extensive that the organ has no potential for recovery and cannot maintain the body’s internal functions. Countries worldwide have adopted the principle that death occurs when either the brain or the heart irreversibly fails in its functions. In the United States, the time of brain death has been accepted as the time of the person’s death in legal terms.


The determination of whether a comatose patient is brain-dead or can possibly recuperate is extremely important. Issues such as organ transplant programs that require the donation of healthy organs and the economic and emotional expense involved in the treatment and care of a comatose patient make it critical to know when to fight for life and when to diagnose death.


In carrying out the many details of the physical care and assessment of the comatose patient, health care personnel must not lose sight of the fact that the patient is a fellow human being and a member of a family. One cannot always be sure exactly how much the patients are aware of what is being said or done as care is given. Whatever the level of awareness and response, comatose patients should be told what will be done to and for them, as they deserve the same respect afforded alert and aware patients.




Bibliography


Bongard, Frederick, and Darryl Y. Sue, eds. Current Critical Care Diagnosis and Treatment. 3d ed. New York: McGraw-Hill Medical, 2008.



"Coma." Mayo Clinic, October 12, 2012.



"Coma / Vegetative State." Brainline, 2013.



Dowshen, Steven. "What Is a Coma?" Nemours Foundation, October 2011.



Goldman, Lee, and Dennis Ausiello, eds. Goldman's Cecil Medicine. 24th ed. Philadelphia: Saunders/Elsevier, 2011.



Leikin, Jerrold B., and Martin S. Lipsky, eds. American Medical Association Complete Medical Encyclopedia. New York: Random House Reference, 2003.



Miller, Benjamin F., Claire Brackman Keane, and Marie T. O’Toole. Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health. Rev. 7th ed. Philadelphia: Saunders/Elsevier, 2005.



"NINDS Coma Information Page." National Institute of Neurological Disorders and Stroke, February 11, 2013.



Plum, Fred, and J. B. Posner. The Diagnosis of Stupor and Coma. 4th ed. New York: Oxford University Press, 2007.



Ropper, Alan H., et al. Neurological and Neurosurgical Intensive Care. 4th ed. Philadelphia: Lippincott Williams & Wilkins, 2004.

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