Evidence map›Paper›PMID 37277612›Full record

ArticleEye (London, England)2023

Time and Motion Studies to assess surgical productivity in cataract theatre lists within the National Health Service: Immediate Sequential Bilateral Cataract Surgery versus Delayed Sequential Bilateral Cataract Surgery.

Khayam Naderi, Chun Fung Jeffrey Lam, Sancy Low, Mani Bhogal, Ashmal Jameel, Korina Theodoraki, Lily Lai, Luis Onrubia Garcia, Harry Roberts, Scott Robbie and 1 more

Abstract read
In one paragraph

Article in Eye (London, England), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

6 citing papers in PubMed.

  1. Article
  2. Article
  3. The future of cataract surgery.Eye (London, England) · 2025
    Review
  4. Observational
  5. Observational
  6. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors.

Khayam NaderiDepartment of Ophthalmology, St. Thomas' Hospital, Lambeth Palace Road, London, SE1 7EH, UK. knaderi@doctors.org.uk.ORCID 0000-0002-1066-296X
Chun Fung Jeffrey LamDepartment of Ophthalmology, St. Thomas' Hospital, Lambeth Palace Road, London, SE1 7EH, UK.
Sancy LowDepartment of Ophthalmology, St. Thomas' Hospital, Lambeth Palace Road, London, SE1 7EH, UK.
Mani BhogalDepartment of Ophthalmology, St. Thomas' Hospital, Lambeth Palace Road, London, SE1 7EH, UK.
Ashmal JameelDepartment of Ophthalmology, St. Thomas' Hospital, Lambeth Palace Road, London, SE1 7EH, UK.
Korina TheodorakiDepartment of Ophthalmology, St. Thomas' Hospital, Lambeth Palace Road, London, SE1 7EH, UK.
Lily LaiDepartment of Ophthalmology, St. Thomas' Hospital, Lambeth Palace Road, London, SE1 7EH, UK.
Luis Onrubia GarciaDepartment of Ophthalmology, St. Thomas' Hospital, Lambeth Palace Road, London, SE1 7EH, UK.
Harry RobertsWest of England Eye Unit, Royal Devon and Exeter NHS Foundation Trust, Exeter, EX2 5DW, UK.
Scott RobbieDepartment of Ophthalmology, St. Thomas' Hospital, Lambeth Palace Road, London, SE1 7EH, UK.ORCID 0000-0002-8153-5677
David O'BrartDepartment of Ophthalmology, St. Thomas' Hospital, Lambeth Palace Road, London, SE1 7EH, UK. davidobrart@aol.com.ORCID 0000-0002-1065-3166

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundTo compare productivity of National Health Service cataract lists performing unilateral cataract (UC) surgery vs Immediate Sequential Bilateral Cataract Surgery (ISBCS).

methodsFive 4-hour lists with ISBCS cases and five with UC were observed using time and motion studies (TMS). Individual tasks and timings of each staff member in theatre was recorded by two observers. All operations were performed by consultant surgeons under local anaesthesia (LA).

resultsMedian number of eyes operated per 4-hour list was 8 (range 6-8) in the ISBCS group and 5 (5-7) in the UC group (p = 0.028). Mean total theatre time (defined as time between the entry of the first patient and the exit of the last patient from theatre) was 177.12 (SD 73.62) minutes in the ISBCS group and 139.16 (SD 47.73) minutes in the UC group (p = 0.36). Mean time to complete two consecutive unilateral cataract surgery operations was 48.71 minutes compared to 42.23 minutes for a single ISBCS case (13.30% time saved). Based on our collected TMS data, a possible 5 consecutive ISBCS cases and 1 UC (total 11 cataract surgeries) could be performed during a four-hour theatre session, with a theatre utilisation quotient of 97.20%, contrasting to nine consecutive UC, with a theatre utilisation quotient of 90.40%. DISCUSSION: Performing consecutive ISBCS cases under LA on routine cataract surgery lists can increase surgical efficiency. TMS are a useful way to investigate surgical productivity and test theoretical models for efficiency improvements.

Indexed as

CataractCataract ExtractionEyeHumansState MedicineTime and Motion Studies

Identifiers

PMID37277612
PMCPMC10239710

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.