PRÁCTICA 3 CONSTRUCCIÓN DE UN PROGRAMA CNC PARA PIEZAS CON INTERPOLACIONES LINEALES

If yes, how many times?

8. Has the patient required release of scleral sutures since

the six month visit?

Yes

No

□

Thank you very much for your participation in this survey.

If you have any queries please do not hesitate to contact the Beth Edmunds or

Patricia Morton at the Royal College of Ophthalmologists on

0171 935 0702 ext 42.

APPENDIX n

Definitions of secondary outcome and explanatory variables

Early complications

Hyphaema: any hyphaema, further quantified as less than 1mm in height, or more than or equal to 1mm in height

Shallow anterior chamber: any degree of shallowing including irido-comeal touch Flat anterior chamber: comeo-lenticular touch

Choroidal detachment: any choroidal detachment

Hypotony: lOP less than 6 mmHg at first post-operative visit after discharge Bleb leak: any leak

Other: any other early complication

Late complications

Cataract: any cataract, further quantified as cataract causing reduction in visual acuity by two or more Snellen lines

Loss of visual acuity: reduction in visual acuity by two or more Snellen lines Endophthalmitis: any endophthalmitis

Encapsulated bleb: any encapsulated bleb Other: any other late complication

Further surgery

Any surgical procedure following trabeculectomy for trabeculectomy failure or one of its complications, categorised into: revision of wound, cataract extraction, anterior chamber reformation, redo-trabeculectomy, choroidal drainage, vitreous biopsy, vitrectomy or other.

Consultant characteristics

Several variables thought to represent defining features of a consultant’s practice were reported in the preliminary contact questionnaire. These variables were used for the outcome analysis and the non-response study.

Specialist interest: whether the consultant reported having a specialist interest in glaucoma or not.

Number of years: the number of years since appointment to a consultant post. This was a proxy measure of the level of experience of the consultant.

Size of unit: the number of consultants in the unit.

Number of trabeculectomies: the number of trabeculectomies the consultant reported performing in the year prior to the survey. This was to indicate the level of activity of the consultant.

Hospital: whether the consultant reported holding their main appointment in a district general hospital or in a university hospital.

Patient characteristics

Baseline chnical data, including diagnostic and listing visual fields, were collected from the initial questionnaire.

Age: age in years Sex: male or female

Race: racial groups were classified according to 1985 census data into white, black, black Caribbean, black other, Chinese, Indian or Bangladeshi. As very few non-white cases were recruited, this was recoded into a binary variable with categories “white” or “other”.

Diagnosis: Eligible patients had a diagnosis of POAG, PXG, PDG or NTG.

Stage of glaucoma: graded according to the degree of monocular visual field loss at the listing visit as mild (normal field), moderate (glaucomatous field loss sparing the central 5 degrees of fixation) or advanced (glaucomatous field loss involving the central 5 degrees of fixation).

Duration of glaucoma: the number of years between the diagnosis of glaucoma and trabeculectomy lOP at diagnosis: lOP (in mmHg) in the operated eye at diagnosis

lOP at listing: lOP (in mmHg) in the operated eye at the visit when the decision to operate was made and the patient’s name put on the waiting list

Visual acuity at listing: Snellen visual acuity at the listing visit.

Optic disc findings: normal, possibly glaucomatous and definitely glaucomatous

Co-morbiditv: pre-existing cataract, other ocular disease affecting visual acuity or visual field, diabetes, age related macular degeneration (ARMD), ischaemic heart disease, hypertension, peripheral vascular disease, Raynauds, migraine.

Number of drops: the number of topical anti-glaucoma medications used in the operated eye prior to trabeculectomy. This was recoded as a binary variable with categories < 2 drops and > 2 drops. Pilocarpine: whether pilocarpine had been used for more than six months at any point prior to trabeculectomy or not.

Adrenaline: whether adrenaline had been used for more than six months at any point prior to trabeculectomy or not.

ALT: whether argon laser trabeculoplasty had been used prior to trabeculectomy or not. Waiting time: the time interval (in months) between listing and trabeculectomy.

Details of surgery

Data describing the operative technique were reported in the initial questionnaire. Post-operative

modifications of surgery such as bleb needling, suture release and subconjunctival 5FU were reported in the initial questiormaire and both follow-up questiormaires.

Eve: left or right.

Anaesthetic: general or local (retrobulbar, peribulbar, topical, sub-Tenon’s or subconjunctival).

Grade of surgeon: consultant, senior registrar, registrar, senior house officer, associate specialist or other. Site: site of surgery: supero-nasal, directly superior or supero-temporal.

Traction suture: whether used or not, if used whether it was placed under the superior rectus or through the comea.

Paracentesis: whether performed or not.

Scleral flap shape: rectangular, triangular or other.

Punch: whether a punch was used for the sclerostomy or not. Cyclodialysis: whether a cyclodialysis was created or not

Peripheral iridectomy: whether a peripheral iridectomy was performed or not Releasables: whether releasable sutures were used or not.

Antimetabolites: whether used or not. If used, the type (5FU, MMC or ^-irradiation), dose, method and duration of application.

Peri- and ix)st-operatiye management Medications

Mydriatics. antibiotics and steroids: whether these agents were used topically or subconjunctiyally at surgery.

Steroids: whether post-operatiye steroid drops were used. Interyentions

Suture release: whether sutures were lysed or released post-operatiyely or not. Needling: whether post-operatiye needling was performed or not.

Subconiunctiyal 5FU: whether post-operatiye subconjunctiyal 5FU was used or not.

Anti-glaucoma medications: information was sought from the first outpatient yisit, the six-month yisit and the final follow-up yisit regarding the institution of topical anti-glaucoma therapy. If drops were prescribed at any of these points the patient was classified as being on drops at final follow-up.

APPENDIX III