JP2002169891A - Automatic calculation with medication quantity feedback function by computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for improving the safety of calculation when a health care professional such as a doctor, a dentist and a pharmacist decides medication quantity. SOLUTION: This device can easily perform the calculation. Outlier input is eliminated, conventional manual complicatedness is eliminated and erroneous administration by human errors such as miscalculation can also be reduced because a user interface that does not use a keyboard eliminates pressing mistakes and an input range can be limited. Whether a calculated value is proper is checked again in a computer, and when the calculated value is not proper, an alarm is issued and the calculated value is feedbacked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a physician, a dentist,
When determining the dose of a drug by a medical worker such as a pharmacist,
The present invention relates to an apparatus for improving the security of the calculation.

[0002]

2. Description of the Related Art In some cases, the dose of a drug is determined based on the body surface area or various blood data. Conventionally, these calculations are performed manually (including a calculator) or on paper. And a plastic slide rule.

[0003]

The manual calculation and the calculation of the drug dose using a plastic slide rule are: 1) Some procedures are complicated and the calculation is not easy. You cannot escape from human mistakes such as calculation mistakes. Moreover, once the wrong dose has been calculated, it can only be checked and corrected by the person involved. This is considered to be one of the causes of accidents of overdose of anticancer drugs and the like that have frequently occurred recently.
Automatic calculation by a computer solves these two points.

[0004]

The required data such as height and weight are input on a computer. At this time, since input is performed by using a track bar, up / down arrow buttons, etc., a keyboard is not required, and an input error due to a mistake in typing is eliminated.

[0005] In addition, the input with the track bar and the up and down arrow buttons sets the upper and lower limits of the values that can be input so that abnormal data cannot be input (for example, height 1.
5 cm, 350 cm, etc.).

[0006] The computer calculates a numerical value on the basis of the input numerical value and determines the dosage such as the body surface area and displays the dosage. At this time, the physique, age, etc. of the side to be administered (for example, the patient) are displayed. Then, the upper limit of the appropriate dose is calculated and compared with the calculated upper limit. If an abnormal dose is calculated due to an input error or the like, a warning is issued and the user is fed back.

When another data is input again, in order to prevent erroneous recognition when the previous calculated value remains when the input value is changed by the track bar or the up / down button, the previous data is changed at the moment when the input value is changed. Delete the calculated value from the screen. Then, after the input value is determined, new calculation data is not displayed unless the calculation button is pressed again.

In other words, the present invention is not merely a computer or what is conventionally done manually or using a slide rule made of paper or plastic, but various mechanisms for preventing human error in dose determination are essential. .

Example 1 The body surface area of a patient to which an anticancer agent is administered is determined, and the dosage is increased for patients with good renal function when administered as OOmg per body surface area or for patients with good renal function calculated from the value of renal function. It is common for patients to do reduction. However, formulas for calculating body surface area and formulas for calculating the dose of a drug from renal function are not all simple.

An anticancer drug called carboplatin (trade name: paraplatin) will be described as an example. The upper limit of the dose of carboplatin is 400 mg per body surface area in terms of dosage, but in actual clinical practice, the dose is often determined by the renal function of the patient. That is, a large amount is administered to a patient having good renal function, and a small amount is administered to a patient having poor renal function. There are several known formulas, all of which are complicated.

Therefore, this is automatically calculated by a computer. The computer user interface uses a track bar and buttons to eliminate typing on the keyboard, eliminate the possibility of typing errors, and set upper and lower limits on input data values to prevent abnormal data from being input.
For example, the height of the track bar is 50 cm to 200 cm, the weight is 3 kg to 150 kg, and the height is 1.5 cm.
(1) Eliminate erroneous input such as may occur if the unit is incorrectly input as meters. Also, a physique that is significantly different from the standard weight, such as a height of 180 cm and a weight of 20 kg, will be warned and fed back to the user. Use the up and down buttons to enter the age and set the upper and lower limits (from 1 to 99) (3). Up and down buttons are used to enter renal function, and upper and lower limits are also set. That is, it cannot be administered to patients with extremely poor renal function.

When the dose calculation button (4) is pressed, the dose is calculated from the input result. The calculated dose is defined as the upper dose limit on the dosage, that is, body surface area × 400 mg.
If the dose exceeds the upper limit, a warning is issued and the user is fed back (6). If not, the dose is displayed on the screen (5). As a result, even if erroneous data is input due to an input error or misunderstanding, a recheck is performed, so that erroneous administration can be prevented.

When the input value is changed, if the previous data remains displayed on the screen, it may be erroneously recognized. Therefore, when the input value is changed with the track bar or the up / down button, the previous data is changed. The new dose is not displayed unless the calculation button (4) is pressed again at the end of deletion from the screen.

[0013]

EXAMPLE 2 A patient who cannot take a meal must be given all the necessary water, nutrients, etc., such as calories and electrolytes, by infusion. In this case, it is common to administer various drugs in combination so as to obtain the necessary water content, calorie content, and electrolytic mass. In the past, the only way to calculate the total water content, total calories, and total electrolyte by these combinations was to manually add the components and look at the component table. This is converted into a computer, and component data of various drugs are built in. When various drugs to be used and the number of each drug are selected on the screen, the total is added up, and the total dose, total calories, and total electrolyte are displayed. If the standard dose is exceeded at this time, a warning is issued and a recheck is encouraged (7).

【The invention's effect】

The computerization not only eliminates the complexity of the conventional procedure for determining the drug or dose to be administered, but also reduces the possibility of incorrect administration of the drug due to calculation errors. In addition, since there is a feedback mechanism, a check is made again for an input error or an error due to a misunderstanding.

[Brief description of the drawings]

FIG. 1 is a flowchart from a user input to a dose display according to a first embodiment of the present invention.

FIG. 2 is a display screen on an actual monitor according to the first embodiment of the present invention.

FIG. 3 shows a state of displaying a warning sentence according to the first embodiment.

FIG. 4 is a diagram showing a warning display window according to the second embodiment.

[Explanation of symbols]

 (1) Height input bar (2) Weight input bar (3) Age input up / down button (4) Dose calculation button (5) Dose display field (6) Warning text display (7) Warning display window

Claims (2)

[Claims] An automatic calculation with a feedback mechanism of a drug dose by a computer, wherein not only a conventional manual calculation can be simply calculated by a computer but also the calculated result is used as a subject of administration. (Patients, etc.)
Judgment was made as to whether the dose was appropriate based on the physique and the like, and a mechanism was provided to prevent erroneous input and erroneous administration by, for example, issuing a warning when the dose exceeded the upper limit. 2. An interface that uses a track bar, up / down arrow buttons, and the like for data input, and eliminates numeric input from a keyboard. The upper and lower limits of the input value are set, and once calculated data disappears when the track bar or the like is moved again, and the new calculated value is not displayed until the calculation button is pressed again.