Terms starting with O

OHSS

Ovarian Hyperstimulation Syndrome (OHSS) is a potentially serious complication of fertility treatment in which the ovaries over-respond to stimulation drugs, becoming enlarged and leaking fluid into the abdomen. Mild cases are managed conservatively with rest and hydration, whilst severe cases can cause significant fluid accumulation, reduced kidney function, and blood clots, requiring hospitalisation.

Operation Report

A signed surgical narrative produced by the operating surgeon describing the procedure performed, the technique used, intra-operative findings and complications, materials placed, duration, and team members. The operation report is part of the patient's permanent medical record.

In medical tourism: Medical tourists should receive the operation report before flying home. Without it, a clinician in the home country cannot manage complications safely. The report is mandatory under most national medical council standards and is treated as the legal record of the procedure.

Osseointegration

The biological process by which living bone cells grow and bond directly onto the surface of a titanium or zirconia implant, creating a stable, functional union without intervening fibrous tissue. Successful osseointegration is the foundation of modern dental implantology and is also critical to the long-term stability of orthopaedic joint replacement prostheses.

Ossification

The biological process by which new bone tissue is formed, either during normal skeletal development or as part of healing after a fracture or bone graft procedure. In the context of medical tourism recovery, heterotopic ossification refers to the abnormal formation of bone in soft tissue following joint replacement surgery, which may cause pain and restricted movement.

Ostomy

A surgically created opening (stoma) connecting an internal organ to the outside of the body, most commonly colostomy (colon to abdominal wall), ileostomy (ileum to abdominal wall), or urostomy (urinary tract to abdominal wall). May be temporary or permanent. Patients with new ostomies require stoma-nurse education on appliance management, skin care, dietary adjustment, and complication recognition.

Otoplasty

A surgical procedure to reshape, reposition, or reduce the size of prominent or irregularly shaped ears, most commonly performed to correct ears that protrude significantly from the head. The procedure involves sculpting and suturing the cartilage through incisions made behind the ear, leaving any resulting scars inconspicuously concealed.

Ovarian Stimulation

The administration of fertility medications, typically injectable gonadotrophin hormones, to stimulate the ovaries to produce multiple mature follicles and eggs in a single menstrual cycle, rather than the single egg produced in a natural cycle. The response is carefully monitored via blood tests and transvaginal ultrasound scans to maximise egg yield whilst minimising the risk of OHSS.