Preoperative assesment

You are an anaesthesiologist preparing a 13-year-old patient with Duchenne muscular dystrophy for surgical correction of neuromuscular scoliosis from level Th4 to L4 (Cobb angle 82 degrees). Which preoperative examinations would you indicate in addition to standard preoperative examination concerning the patient's comorbidities and surgical intervention?
13
years
132
cm
29
kg
man
RR
16 /min
HR
85 /min
SpO2
94 %
BP
114/61 (79) mmHg
GCS
15
EKG
rythm: sinus
action: regular
Glycaemia
Gly
5,3  mmol/L
Complete blood count
HGB
132  g/L
HTC
0,38
ERC
4,1  x1012/L
LEU
6,5  x109/L
PLT
279  x109/L
Blood group
0+
Coagulation
INR
0,89
aPTT
37 s
fibrinogen
2,6 g/L
PT
13 s
Biochemical analysis
Na
136  mmol/L
K
4,2  mmol/L
Cl
105  mmol/L
Glycaemia
Take a sample
Complete blood count
Take a sample
Coagulation
Take a sample
Biochemical analysis
Take a sample