| Osmolarity urine |
| OVA1 |
| Osmo.Fragil. |
| OPX1 |
| OPX2 |
| OPx3 |
| OB X1 |
| OBX2 |
| Ornithine |
| Or |
| Og |
| OTR |
| Osteocalcin |
| OCB-serum |
| old gen |
| Oxazepam |
| Ox |
| Others |
| Organic Acid -urine |
| Ortic Acid |
| Osmolality (s) |
| Osmolality Urine |
| Others |
| Oxalate/ Creatinine |
| Outdoor |
| OBX3 |
| Ova & Parasit |
| Occult Blood |
| Others |
| OB (Niple Discharge) |
| OCB-CSF |
| old gen |
| ONCOASSAY |
| other Attach |
| other Genetic moloc-inf1 |
| OCB CSF+IgG Index |
| Oxcarbamazepin Level |
| Ovalocyte |
| Other-PND |
