Lab workup dictated by presentation
Obtain an upright KUB to assess<unk>  position & slippage
Phi (φ) angle- Angle between a vertical line oriented through the spine and a second line running on the long axis of the<unk> <unk> 
Normal is 4-58 degrees
Swallow Study under fluoroscopy to assess for gastro-esophageal obstruction
CT Abd/Pelvis to assess for perforation (contained or free), abscess, intra-abdominal fluid or bleeding
Endoscopy – visualize inner lumen of esophagus and stomach for partial or full erosion
Phi (φ) angle- Angle between a vertical line oriented through the spine and a second line running on the long axis of the<unk> <unk> 
Normal is 4-58 degrees
Lap band complications
At or near time of banding or adjustment of band
Masticator space infections
Acute gastroesophageal obstruction - postop edema at application site forces proximal movement of the band, get KUB
Aortic endograft complications
Intra-abdominal bleeding
Left ventricular assist device complications
Perforated viscus