PCA pump

You are an anaesthesiologist present at surgery. The patient is a thirty-six-year-old woman, she weighs 70 kg and her height is 160 cm. She is undergoing total mastectomy. Total mastectomy is a very painful procedure that causes a significant postperative pain and carries a high risk of chronic pain development.

The operation is drawing to a close. During the procedure we administered sufentanil IV (total of 30 μg within two hours). What other analgesics do we add before the end of anaesthesia?
36
years
160
cm
70
kg
woman
RR
16 /min
HR
75 /min
SpO2
96 %
BP
130/85 (100) mmHg
EKG
rythm: sinus
action: regular
frequency: 75 bpm
Glycaemia
Gly
5,0  mmol/L
Arterial blood gas
pH
7,4
pCO2
42  torr
pO2
82,5  torr
BE
0,1  mmol/l
HCO3
24,5  mmol/l
Complete blood count
HGB
132  g/L
HTC
0,4
ERC
5  x1012/L
LEU
7  x109/L
PLT
200  x109/L
Biochemical analysis
Na
140  mmol/L
Cl
110  mmol/L
Mg
0,8  mmol/L
Ca
2,3  mmol/L
P
0,8  mmol/L
Glycaemia
Take a sample
Arterial blood gas
Take a sample
Complete blood count
Take a sample
Biochemical analysis
Take a sample