The InfusiCalc web application has a user interface that has been modelled on popular "contacts" applications, so you should find it very intuitive to choose, add and edit drugs, as well as scroll the drug list or select a category of drugs.

It comes with nearly 100 drugs preinstalled and you are shown a list of these drugs when you first run the program. You can use this list, or choose a category by clicking the "categories" button at the top left. The "plus" button at the top right allows you to add a new drug.

The tabbar at the bottom allows you to switch to the favorites list, show the list of drugs (or a category of drugs), the sets, setting, or information about infusicalc.

The InfusiCalc web application can work offline without Internet access.

All drugs in InfusiCalc can be assigned to categories, or left "unfiled". The category screen, shown here, shows each category, as well as the number of drugs in that category.

Clicking the "plus" button at the top right allows you to add a new category. Clicking the edit button allows standard iPhone editing - you can delete a category or move its order in the list. All drugs in the deleted category are moved to the "unfiled" category, they are not deleted

Clicking on the blue arrow to the right of a category allows you to edit the name, delete it, and delete it and all the drugs inthe category.

Infusion

Weight Field

This contain the patients weight in either kilograms (kg) or pounds (lb). Internally all weights are stored in kilograms and all infusions rates are based on this.

Weight Popup Selector

This trigger alternates between weight in kilograms (kg) or pounds (lb).

Rate Value Fields

There are three rate value fields. The first two have variable rates, as determined by the popup selectors. The third field is always in mL/hr or drops/min. The values found in these fields, and their associated triggers, will always be equivalent. When a new value is entered in a field, the others are updated automatically.

Rate Value Popup Selectors

These triggers may contain one of sixteen rates: If the base mass type (entered in the Edit Drug Screen) is mg, the rates are:

• mcg/kg/min (micrograms per kilogram per minute)

• mg/kg/min

• mcg/kg/hr

• mg/kg/hr

• mcg/min

• mg/min

• mcg/hr

• mg/hr

In the last four types, weight is not used in the calculation of mls/hr, but it may be used in the calculation of other equivalent values in the other rate field. How they work is explained more fully below.

If the base mass type (entered in the Edit Drug Screen) is "Units", the rates are:

• mUnits/kg/min (milli-Units per kilogram per minute)

• Units/kg/min

...and so on for mass types "Equivalents", "moles" and "litres"

Dilution

This section contains three fields:

1. The first is the mass field, which contains the mass of drug to be diluted to make up the infusion.

2. The second field contains the volume of diluent in millilitres (mls).

3. The third field is the concentration of the resultant solution.

Bolus

Dose Value Popup selectors

Unlike in the infusion screen, these two triggers are different. The first is a dose per weight, while the second is the absolute dose.

If the base mass type (entered in the Edit Drug Screen) is mg, the weight doses are:

• g/kg

• mg/kg

• mcg/kg

And the absolute doses are

• g

• mg

• mcg

And similar if other units are chose (units, equivalents, moles, litres)

Normal Range

These are the low and high values of the normal range of boluses for the drug. The rate type will automatically be set as the "Standard Unit" as described above.

Frequency Field

This shows the frequency per hour the dose can be delivered, as specified in the database. Only two adjacent figures are allowed (eg. 6-8 hourly).

Maximum Dose

This is a suggested maximum dose for a bolus. Typically weight based doses will not be appropriate for large sized adults, and a maximum dose can be suggested here.

Frequency

An hourly frequency to suggest for the drug bolus, if applicable. Two adjacent frequencies can be selected (eg 4-6 hourly).

Route

Routes that are suitable for drug delivery

Sets

Set allow multiple drugs to be viewed at the same time, and changes made to rates and patient weight resulting in immediate updates. The information displayed is a subset of the the normal drug views, using the stored standard concentrations.

Sets are fully editable, allowing you to add any number of drugs, in any order, mixing infusion and boluses. For example, you can have an "emergency" list with doses of Suxamethonium, Atropine or Adrenaline all viewable at the same time.

Notes

The notes screen is used to store notes about drugs in the database.

This causes a red warning symbol to appear above the note tab. The purpose of this is to alert the user to the presence of important information in the note that should be reviewed.