Patients

Model > User's Guide > Patients

Patients Are Not Really Patients

Patients are really simulations that begin with a set of unusual initial conditions. It is your job to make an accurate diagnosis and to correct the condition if possible.

To see a patient, click on the File main menu selection and then click on Load Initial Conditions. A dialog box will list available patients as file names with an ICS extension, such as Mr Smith.ICS. Select a patient, the patient’s data will be loaded, and the simulation can be undertaken.

Initially, the toolbar may only show buttons that are relevant to clinical medicine. You may be able to add additional buttons to the toolbar using the View main menu selection. If the View main menu selection is grayed out, you’re stuck with the initial lineup of toolbar buttons. You’ll be working with a limited amount of information in this case, rather than the full physiological picture.

A brief patient history is presented in the upper left-hand corner of the Charts panel.

Returning To Normal After Seeing Patients

Mr. Norm Subject represents a normal subject. Norm is described in the patient history section of the Charts panel as "... a middle-aged male in apparently good health." When QCP is first run, Norm supplies the model’s initial conditions.

When a patient is loaded, the patient’s initial conditions replace Norm’s initial conditions and the patient history section of the Charts panel is updated.

After a patient is loaded, the Restart main menu selection starts the solution again using the patient’s initial conditions.

To re-establish Norm Subject’s initial conditions, click Options / Reset... The default checks are correct. Click OK. If successful, Norm’s thumbnail sketch will reappear on the Charts panel.

Thumbnail Sketches

QCP is supplied with a variety of patients, i.e., initial conditions files with ICS file extensions. A sampling of patients’ thumbnail sketches follows.

Mr. Baker   Mr. Baker is in the ER with shortness of breath. He has tachycardia and a very strong pulse.

Mr. Best   Mr. Best is a political activist who has been on a hunger strike for the past 30 days.

Mr. Cook   You have just discovered Mr. Cook in his closed garage, unresponsive, with his automobile running. You immediately turned off his automobile.

Ms. Craft   Ms. Craft is a diabetic. The nurse gave her an insulin shot when she awoke. Unfortunately, it was the wrong dose.

Mr. Davis   Mr. Davis was in an automobile accident about an hour ago. Hemorrhaging was severe and it may be continuing.

Mr. Doe   John Doe was shot in the neck and chest about an hour ago. He is hypotensive and not responding.

Ms. Goode   Ms. Goode was sitting next to you in Wendy’s when she suddenly gasped and slumped to the floor.

Mr. Green   Mr. Green was struck in the head in an industrial accident. He is now recovered, but he says that he is always thirsty.

Mr. Hobbs   Mr. Hobbs was in a marine accident and was lost at sea for three days with no food and water.

Ms. Jones   Ms. Jones is a lifelong smoker. She says she tires easily and complains of dyspnea.

Ms. Kelso   Ms. Kelso is a Haitian immigrant who was very ill several times as a child. She has a murmur.

Mr. Rosco   Mr. Rosco’s power saw severed an electrical wire. Fellow workers started CPR. EMT’s installed a ventilator.

Ms. Smith   Ms. Smith reports periods of sweating and palpitations.

Mr. West   Sgt. West stepped on a land mine in Croatia. He seemed to recover OK but something happened. He feels bad and has no stamina.

Mr. Wheat   Mr. Wheat took one or more bullets to the chest. A friend rushed him to the ER.

Creating New Patients

The initial conditions to a solution can be stored in a file and reloaded at any time using the File / Load Initial Conditions menu selection. The file extension for initial condition files is traditionally .ICS, but any file extension can be used.

You can create a new initial condition file at any point in a solution using the File / Save Initial Conditions menu selection.

In addition to numerical values, the patient’s thumbnail sketch is also saved in an initial conditions file. You can edit the thumbnail sketch before saving to reflect the new initial conditions using the Options / Notes menu selection.

Some additional information is saved in an initial conditions file. You can adjust the value of the independent variable (time) and control the availability of toolbar groups using the Options / Saving IC’s menu selection before saving the initial conditions. This feature can be used to ensure that only clinical buttons are displayed, for example, when a particular initial conditions file is loaded.

 
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updated 03-21-05