A client has a Sliding Scale for Insulin dosages sub-cut. The order is for Humulin Regular Insulin U-100 q6h as follows:

0-180 mg/dL No Coverage

181-240 mg/dL 2 units sub-cut 241-300 mg/dL 4 units sub-cut

301-490 mg/dL 6 units sub-cut

Greater than 400 mg/dL administer 8 units sub-cut and repeat finger stick in 2 hr, call MD/Provider At 3:30 PM. the client's finger stick is 164 mg/dL How much coverage should the patient receive?

A) 6 Units Regular Insulin sub-cut:
According to the sliding scale, a blood glucose level of 164 mg/dL would not fall within the range requiring 6 units of insulin. The 6-unit dose is for blood glucose levels between 301-490 mg/dL. Since the client's reading of 164 mg/dL is lower than 181 mg/dL, this dosage is not applicable.

B) 2 Units Regular Insulin sub-cut:
This is also incorrect. The 2-unit dose is prescribed for blood glucose levels between 181-240 mg/dL. Since the client's reading is 164 mg/dL, it falls below this range, so 2 units is not appropriate.

C) 0.5 Units Regular insulin sub-cut:
This is not correct because there is no provision in the sliding scale for administering 0.5 units of insulin. The scale provides dosing for specific ranges and does not include fractional doses. Additionally, the blood glucose reading of 164 mg/dL does not require any insulin according to the prescribed sliding scale.

D) No coverage: 
According to the sliding scale, a blood glucose level of 164 mg/dL falls within the 0-180 mg/dL range, which specifies no coverage or insulin administration. The sliding scale clearly indicates that no insulin is needed when the blood glucose level is within this range.