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Ophthalmology Proliferative vitreoretinopathy ( PVR ) is a disease that develops as a complication of rhegmatogenous retinal detachment . PVR occurs in about 8–10% of patients undergoing primary retinal detachment surgery and prevents the successful surgical repair of rhegmatogenous retinal detachment.
PPV: positive predictive value positive pressure ventilation PPx: prophylaxis PR: prothrombin ratio p.r. per rectum (as noun: rectal examination) PRA: plasma renin activity: PRBC PRBCs: packed red blood cells: PREA: Pediatric Research Equity Act Preme: premature infant (see premature birth) Prep PrEP preparation pre-exposure prophylaxis [6] PRES
Visual acuity with eye chart at Near 15.7 inches (400 mm) and without (sc: Latin sine correctore) correctors (spectacles); Ncc is with (cc: Latin cum correctore) correctors. See Visual_acuity#Legal_definitions: VA OS Left visual acuity VA OD Right visual acuity VDU Visual display unit VF Visual field VPS Variable prism stereoscope WD
Additionally, PPV may result in incomplete separation, and it may potentially leave a nidus for vasoactive and vasoproliferative substances, or it may induce development of fibrovascular membranes. As with any invasive surgical procedure, PPV introduces trauma to the vitreous and surrounding tissue.
PPV, ppv or pPv may refer to: Technology. Pay-per-view on cable or satellite television; People Powered Vehicle, a human-powered vehicle from 1970;
The positive predictive value (PPV), or precision, is defined as = + = where a "true positive" is the event that the test makes a positive prediction, and the subject has a positive result under the gold standard, and a "false positive" is the event that the test makes a positive prediction, and the subject has a negative result under the gold standard.
Abbrev. [1]Meaning [1] Latin (or Neo-Latin) origin [1]; a.c. before meals: ante cibum a.d., ad, AD right ear auris dextra a.m., am, AM morning: ante meridiem: nocte ...
Pronunciation follows convention outside the medical field, in which acronyms are generally pronounced as if they were a word (JAMA, SIDS), initialisms are generally pronounced as individual letters (DNA, SSRI), and abbreviations generally use the expansion (soln. = "solution", sup. = "superior").