For example, a typical discussion about a case of stress duodenal ulcer might have the visit first asking the anatomy of the four parts of the duodenum; then the arterial supply to the stomach; the common complications of duodenal ulcer; the factors that classically increase and decrease ulcer pain; the features that distinguish ulcer pain from the pain of acute pancreatitis, gall bladder disease, or heart attack; the four indications for surgical intervention; the reasons for measuring serum pancreatic amylase and serum calcium; the mental changes one might expect with GI bleeding in the presence of liver disease, and the reason for the change; the other causes of upper GI bleeding; the way to distinguish upper and lower GI bleeding; and so on.
Furthermore, the visit can shift to a related topic at any point. If he asks about serum calcium and the student correctly answers that there is a relation between parathyroid disease and ulcer, the visit may go on to ask how calcium fluctuates in parathyroid disease; the associated changes in serum phosphate; what changes might be seen in the electrocardiogram; what mental changes are associated with increased and decreased serum calcium, in adults and in children.
Thus a student who began talking about ulcer disease is effectively shunted to calcium metabolism. And, at any time, the visit can turn around, demand to know six other conditions associated with ulcer, [Such as chronic lung disease, cirrhosis, rheumatoid arthritis, burns and strokes, pancreatitis, and the effects of certain drug therapies, especially steroids] and go on to discuss each of them. Visit rounds are two hours long. There is plenty of time.
For the most part, interns and residents are exempt from grilling; it is considered too undignified. The visit treats house officers as colleagues, but not students. A house officer who asks a question of the visit will get an answer. A student who asks a question will most often get a question back, as in "Sir, what does the serum calcium do in Chicken Little disease?" "Well, what do the plasma proteins do in Ridinghood's Macro-globulinemia?" If the student fails to see the light, he will get another hint, also in the form of a question: "Well, then, what about the serum phosphate in Heavyweight's Syndrome?"
This is a form of a game which is repeated over and over again in medical teaching. It is a game useful to the conduct of medical practice. A very simple example of the game is the following:
student: "The patient has a rash and fever."
visit: "Has he ever been to Martha's Vineyard?"
student: "No, he does not have Rocky Mountain spotted fever."
The point is that the student sees the implication behind the question-that each year one or two cases of Rocky Mountain spotted fever are contracted on Martha's Vineyard. Such deductive processes are precisely those important to the conduct of medicine, and therefore represent a useful teaching method. In the extreme, this can lead to a leap-frog interchange which is almost beyond the understanding of the casual observer:
student: "The patient has kidney disease consistent with glomerulonephritis."
visit: "Was there a recent history of infection?"
student: "Anti-streptolysin liters were low."
visit: "Was there a facial rash?"
student: "LE prep and anti-nuclear antibodies were negative."
visit: "Were there eyeground changes?"
student: "Glucose-tolerance test was normal."
visit: "Did you consider rectal biopsy?"
student: "The tongue was not enlarged."
This is jumping from mountaintop to mountain-top, skipping the valleys. In translation, the visit is asking, first, whether the glomerulonephritis was caused by streptococcal infection; second, whether it is due to lupus; third, to diabetes; and finally, whether due to amyloidosis. The student is denying each diagnosis by presenting negative data. Neither teacher nor student specifies the diagnosis; the game is to figure out what each is talking about without saying what it is.
This Socratic tradition of teaching medical students dates back to the days when medicine was an apprenticeship in the strictest sense. The Socratic method has the virtue of informality: on work rounds, the resident can ask the student in passing, "How will we know when Mr. Jones is adequately digitalized?" and the surgeon can pause in his operation to ask the student, "What would happen if I cut this nerve here?" It is a good way to keep the student constantly recirculating his knowledge through his brain, and by and large it works well.
Why not just state the fact, as a declarative statement, for the edification of the student? There is just one major reason: most medical students are tired. At any given moment, a lecture to a medical student is a signal to click off, to tune out, to go to sleep. Partly, this is a learned response. It is common, during the first two years of medical school, to have four hours of lectures and five hours of laboratory work in a single day. Students who are studying late into the night on top of this schedule learn to sleep during lectures with great facility. The pattern carries on into the clinical years. One can observe lectures to medical students and house staff in the hospital in which 20 to 50 per cent of the class is slumped over in their chairs. The lecturer pays no attention. To a lecturer, it is not an insult, but a fact of life. Everybody accepts it; everybody expects it.
The only way to beat the dozing off is to ask questions. Supposedly this makes the learning experience more active, less passive. But, as anyone who has ever attempted to put together a programmed text knows, teaching by questions is extraordinarily difficult. The ideal set of questions is graded, going from fact to fact, leading the student from information he knows well to the reasoning out of information he does not know. On the other hand, the usual unplanned set of questions just draws a blank look and a guess.
For some reason, the question-and-answer teaching method is a peculiarity of professional school instruction. It is common in law, medicine, and business, and practically unknown in other graduate fields. The best teachers can employ it to great effect; most teachers are hopeless at it.
The system is most likely to succeed when applied to an individual-and almost certain to fail when applied to large groups. I have watched a specialist in diabetes walk into a room full of third-year students, rub his hands together, and say: "All right. Let's suppose you've gotten your diabetic patient. He has a blood sugar of three hundred. What kind of diet are you going to put him on?" Nobody in the room had the faintest idea what kind of diet to put him on. "How many grams of carbohydrate do you want to give him?" the instructor demanded. Nobody knew; nobody said anything. Finally he pointed to a student and insisted on a figure. "Ninety grams?" the student said. "Wrong!" said the instructor, and went around the room until somebody finally guessed one hundred grams, the figure he wanted to hear. "Now then, how much insulin do you want to start him with?" the instructor asked, and the game began again.
It would be pleasant to think such examples atypical of medical education, but in fact they are more the rule than the exception. Considerable dedication is required of students to learn medicine in the face of such teaching; one often has the impression that medical education works despite itself.
Useful changes can be made in all elements of the process^-changes in the students, changes in the teachers, changes in the teaching methodology. Of these, only one appears very likely: the traditional routine of every-other-night for clinical students and house officers is dying. Many hospitals are shifting to an every-third-night schedule, which makes a considerable difference. The student or house officer sleeps through his first night off, but he is able to read during the second night; and during the day he is more alert, more awake. This helps to remove one of the oldest paradoxes in medical education-namely that the hospital claims to provide an excellent learning environment, while systematically depriving its students of sleep.