**Conversion of units within the system:**** **

**Length Conversions:**

**Convert 2.85 Kilometer to Meter.**

**Step– 1: Equivalent?**

As we know that 1 km = 1000 m conversion factor =1000.

**Step-2: Multiply or divide?**

Conversion is to smaller units. Multiply by the conversion factor.

2.85 km = 2.85 x 1000 = 2850 m

Hence 2.85 km = 2850 m

**25 mm = ____ cm**

**Step– 1: Equivalent?**

As we know that 1 cm = 10 mm conversion factor =10.

**Step-2: Multiply or divide?**

Conversion is to larger units. Divide by the conversion factor.

25 mm = 25 / 10 = 2.5 cm

Hence 25 mm = __2.5__ cm

**_____ m = 57 mm**

**Step– 1: Equivalent?**

As we know that 1 m = 1000 mm conversion factor =1000.

**Step-2: Multiply or divide?**

Conversion is to larger units. Divide by the conversion factor.

57 mm = 57 ÷ 1000 = 0.057 m

Hence __0.057__ m = 57 mm

**0.04 m = _____ cm**

** Step– 1: Equivalent?**

As we know that 1 m = 100 cm conversion factor =100.

**Step-2: Multiply or divide?**

Conversion is to smaller units. Multiply by the conversion factor.

0.04 m = 0.04 X 100 = 4 cm

Hence 0.04 m = __4__ cm** **

**Length Conversion between Metric and English **

**Convert 5 inches to centimeters.**

**Step– 1: Equivalent?**

As we know that 1 in = 2.5 cm conversion factor =2.5.

**Step-2: Multiply or divide?**

Conversion is to smaller units. Multiply by the conversion factor.

5 in = 5 x 2.5 = 12.5 cm

Hence 5 in = 12.5 cm

**Convert 5 feet 7 inches to centimeters**

**Step– 1: **5 feet 7 inches (5¢ 7²) must be converted to inches before converting to centimeters.** **

As we know that 1 ft = 12 in then 5¢ 7² = (5 X 12) + 7 = 67 inches = 67²

**Step– 2: Equivalent?**

1 in =2.5 cm conversion factor =2.5.

**Step-3: Multiply or divide?**

Conversion is to smaller units. Multiply by the conversion factor.

67² in = 67 x 2.5 = 167.5 cm

Hence 5¢ 7² = 167.5 cm

**Convert 0.75 meter to inches**

**Step– 1: Equivalent?**

As we know that 1 m = 39 in conversion factor = 39.

**Step-2: Multiply or divide?**

Conversion is to smaller units. Multiply by the conversion factor.

0.75 m = 0.75 x 39 = 29.55 in

Hence 0.75 m = 29.55 in

**Conversion of units within the system: **

**S I Length Conversions:**

**Convert 2.85 Kilometer to Meter.**

Step– 1: Equivalent?

As we know that 1 km = 1000 m conversion factor =1000.

Step-2: Multiply or divide?

Conversion is to smaller units. Multiply by the conversion factor.

2.85 km = 2.85 x 1000 = 2850 m, Hence 2.85 km = 2850 m

On the Job Practice |

**The heights of two patients were recorded. Convert the units.**- 1.8 m = _____ cm.
- 1.025 m = _____ cm.
**The range of lengths of newborn babies is 45-55 centimeters. Express the length in millimeters.**

_______ mm – ________ mm.

**During a physical assessment, a mole on a patient’s back was noted and measured.**

Mole: 21 mm = _____ cm.

**A child was admitted to the emergency room with a cut which was noted in the records.**

Cut: 95 mm = _____ cm.

**Additional Practice:**

**Convert the following units as indicated **

- 60 in = _____ cm
- 5’5” = _____ cm
- 6 ft = _____ cm

**DESCRIBE SIMPLE PHYSICIAN ORDER **

Physician’s order is also called drug order. The order of physician to administer drug having the following information is called physician’s order.

- Name of drug to be given(trade/brand name is started with capital letter & generic name is written with small letters)
- Dosage and form
- Route
- Frequency
- Additional description (for special instructions it may or may not be included)

Following are some examples of physician’s order

__Name Dosage Route Frequency additional description __

Paracetamol 500 mg tab P.O q.3-4h. P.r.n. severe muscle pain

NPH insulin 25 units SC q.d. a.c. breakfast

nitroglycerin 0.4 mg tab SL p.r.n. chest pain

**Interpretation of above drug orders:**

- Administer a 500 mg tablet of Paracetamol by mouth every 3 to 4 hours as necessary for severe muscle pain.
- Administer 25 units of NPH insulin subcutaneously every day before breakfast.
- Administer 0.4 mg tablet of nitroglycerin under the tongue as needed for chest pain.

On the Job Practice |

Read the following and interpret the drug orders:

- morphine sulfate 15 mg SC q4h.
- Tylenol 0.6 g PO q.6h p.r.n. headache
- atropine sulfate(optic) 1% sol 2gtt OD q.d.t.i.d.
- Demerol 75 mg IM q.4h p.r.n. pain