title: Variation of blood pressure during topical phacoemulsification.
abstract: BACKGROUND
  The changes of blood pressure in patients undergoing cataract procedure are not well studied. The blood pressures of cataract patients often become uncontrolled intraoperatively causing the procedure to be postponed. Intraoperative rise in blood pressure has been associated with ocular complications such as suprachoroidal haemorrhage and can be fatal from stroke or even myocardial infarction. We attempt to study the changes in blood pressure of patients undergoing cataract surgery.
  
  
  OBJECTIVE
  Prospective study on the variation of blood pressure pre- and intra-operatively.
  
  
  METHODS
  The blood pressure readings of patients going for cataract procedures were measured in five stages during the pre-assessment clinic, on arrival at the day surgery, at the anaesthetic room, on the operating table intraoperatively; and postoperatively. The readings were compared to their age, sex, past medical history, and use of antihypertensive medication.
  
  
  RESULTS
  The rise in systolic blood pressures between intraoperative readings and those at the preassessment and anaesthetic room was highly statistically significant.Being older (>65 years of age), taking more than two antihypertensive drugs, being hypertensive, or having a family history of hypertension does not appear to increase the risk.
  
  
  CONCLUSIONS
  Our study showed that there is a significant rise in systolic blood pressures especially in females during topical phacoemulsification. Further studies are needed on the factors that determine this increase and the changes in blood pressures during different stages of the procedure.
authors.affiliation: Department of Ophthalmology, Watford General Hospital, UK. eyapyc@gmail.com
authors.forename: Y C
authors.initials: YC
authors.lastname: Yap
authors.forename: W W
authors.initials: WW
authors.lastname: Woo
authors.forename: T
authors.initials: T
authors.lastname: Kathirgamanathan
authors.forename: A
authors.initials: A
authors.lastname: Kosmin
authors.forename: B
authors.initials: B
authors.lastname: Faye
authors.forename: S
authors.initials: S
authors.lastname: Kodati
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000772:Anesthesia, Local; D001794:Blood Pressure / Q000502:physiology; D005260:Female; D006801:Humans; D006973:Hypertension / Q000209:etiology*; D007431:Intraoperative Complications; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification / Q000009:adverse effects*; D011446:Prospective Studies; D012307:Risk Factors; D012737:Sex Factors