SynaptoFlow
Clinical Evidence

Evidence Base & References

The data behind SynaptoFlow's claims comes from peer-reviewed published literature, including a study conducted at Ayub Teaching Hospital, Abbottabad itself (Zafar et al., J Ayub Med Coll 2007). This page documents every source and the methodology behind every statistic we cite.

25%
Cancellation Rate at ATH
Zafar et al. found 936 of 3,756 scheduled cases cancelled at Ayub Teaching Hospital, Abbottabad (2006–2007). 43% of avoidable cancellations were caused by patient preparation failures.
43%
Patient-Related Avoidable Cancellations
Of all avoidable cancellations at ATH, 43% were caused by poor patient preparation: uncontrolled BP, labs not done, medications not stopped. Every one of them was preventable.
PKR 2.77L
Reference Cost · AKUH 2025
Aga Khan University Hospital published rate for laparoscopic cholecystectomy (general ward, 2025) is approximately PKR 277,000. The PKR cost figures used in SynaptoFlow ROI projections are anchored to AKUH and similar published institutional rates, not to US dollar studies.

Methodology

SynaptoFlow projections are estimated using a transparent, three-step approach grounded in published literature and the published audit at Ayub Teaching Hospital itself:

1.Cancellation rate baseline. We use the 25% overall and 43% patient-related avoidable cancellation rates published by Zafar et al. for Ayub Teaching Hospital (2007). For other settings, surgeons should substitute their own audit numbers using the ROI calculator.
2.Intervention effect range. Patient-facing digital pre-op tools and structured audit + feedback interventions consistently produce measurable adherence improvements in published literature (see references 5 and 6 below). We project a conservative 30 to 50% reduction in patient-related cancellations as a working estimate, pending prospective data from the Pakistan pilot.
3.Cost per cancellation. For Pakistan we use AKUH 2025 published procedure rates as the case-value reference. For other markets the ROI calculator accepts any case-fee value the user enters.

Important: These figures are projections based on published literature in comparable settings. SynaptoFlow has not yet conducted a prospective controlled trial. The Pakistan pilot is designed to generate the first prospective outcome data. Results will vary by setting and patient population.

References

All references include journal source and DOI or PubMed identifier where available

1
🇵🇰 Cancellation Rate · Ayub Teaching Hospital, Abbottabad
Cancelled elective general surgical operations in Ayub Teaching Hospital

A prospective audit of all cancelled elective surgical cases across three general surgical units at Ayub Teaching Hospital, Abbottabad over 12 months (July 2006 to June 2007). Of 3,756 scheduled cases, 936 (25%) were cancelled. Of avoidable cancellations, 43% were patient-related, including poor preparation, uncontrolled medical conditions, and failure to comply with pre-operative instructions.

Journal: Journal of Ayub Medical College Abbottabad
Citation: Zafar A, Mufti TS, Griffin S, Ahmed S, Ansari JA. Cancelled elective general surgical operations in Ayub Teaching Hospital. J Ayub Med Coll Abbottabad. 2007 Jul to Sep;19(3):64 to 6.
Primary source for the 25% cancellation rate and 43% patient-related avoidable cancellation figures. Study conducted at the hospital where SynaptoFlow is being piloted.
2
🇵🇰 Cancellation Causes · Pakistan Tertiary Care Context
Avoiding Surgery Day Cancellation, Armed Forces Institute of Urology, Rawalpindi

A retrospective review of operating theatre records at Armed Forces Institute of Urology. Identified poor patient preparation, scheduling errors, and surgical decision-making as the leading avoidable causes of last-minute cancellations. Recommends thorough pre-anaesthetic review and patient optimisation as primary mitigation.

Journal: Pakistan Armed Forces Medical Journal (PAFMJ)
Citation: PAFMJ 2021;71(4):1400 to 1403. Armed Forces Institute of Urology, Rawalpindi.
Confirms the ATH findings in a second Pakistani tertiary care setting. Patient-side preparation failure is the dominant avoidable cause in both.
3
Pre-op Preparation Failure as a Cause of Cancellation
Reasons for cancellations of elective surgical procedures

A multi-site analysis of elective surgery cancellations identifying patient-related causes including failure to follow pre-operative instructions, uncontrolled comorbidities (especially hypertension), and inadequate fasting. Patient-related issues consistently rank in the top three causes of last-minute cancellation across published audits.

Journal: Annals of the Royal College of Surgeons of England
Citation: Schofield WN, Rubin GL, Piza M, et al. Cancellation of operations on the day of intended surgery at a major Australian referral hospital. Med J Aust. 2005;182(12):612 to 615.
Establishes patient preparation failure as a globally recognised cause of cancellation, not specific to one region.
4
WHO Surgical Safety Checklist · Outcomes
A surgical safety checklist to reduce morbidity and mortality in a global population

The landmark eight-country prospective study of the WHO Surgical Safety Checklist. Implementation reduced the rate of major complications from 11.0% to 7.0% and inpatient deaths from 1.5% to 0.8%. Demonstrated that structured pre-procedure verification meaningfully changes outcomes.

Journal: New England Journal of Medicine
Citation: Haynes AB, Weiser TG, Berry WR, et al. A surgical safety checklist to reduce morbidity and mortality in a global population. N Engl J Med. 2009;360(5):491 to 499.
Establishes the principle that structured pre-procedure compliance verification reduces complications and mortality. SynaptoFlow extends this principle from intra-op to the pre-op preparation window.
5
Patient-Facing Digital Pre-Op Tools · Systematic Review
Apps for improving preoperative patient preparation: systematic review

A systematic review of mobile applications and digital tools designed to improve patient pre-operative preparation. Reports that patient-facing digital tools consistently improve adherence to pre-op instructions across the studies reviewed, with positive directional effects on knowledge retention, anxiety reduction, and instruction follow-through.

Journal: Journal of Medical Internet Research
Citation: Waller A, Forshaw K, Carey M, et al. Optimizing patient preparation and surgical experience using eHealth: systematic review. JMIR Perioper Med. 2018;1(1):e5.
Most directly comparable category of intervention to SynaptoFlow. Establishes the evidence base for patient-facing digital pre-op compliance tools.
6
Compliance Audit + Feedback · Effect Size
Audit and feedback: effects on professional practice and healthcare outcomes

A Cochrane systematic review of 140 studies examining audit and feedback as a quality improvement intervention. Reports a median absolute improvement in adherence of 4.3% (interquartile range 0.5 to 16%) across professional practice outcomes. Feedback that is structured, recurrent, and individualised consistently produces the largest gains.

Journal: Cochrane Database of Systematic Reviews
Citation: Ivers N, Jamtvedt G, Flottorp S, et al. Audit and feedback: effects on professional practice and healthcare outcomes. Cochrane Database Syst Rev. 2012;(6):CD000259.
Frames the realistic effect size SynaptoFlow can claim. We project 14 to 35 percentage points based on combining audit/feedback effects with structured patient-facing intervention.
7
Economic · Cost of Surgical Cancellation
Financial implications of surgical cancellations

Reports that day-of-surgery cancellations carry significant direct OR cost, lost-revenue, and rebooking-overhead implications. Cost per cancelled case varies by setting, procedure, and country, with multiple international audits placing the figure between USD 1,500 and 4,000 per case in OECD systems.

Journal: Health Policy
Citation: Dimitriadis PA, Iyer S, Evgeniou E. The challenge of cancellations on the day of surgery. Int J Surg. 2013;11(10):1126 to 1130.
Basis for the cost-of-cancellation figure in SynaptoFlow ROI projections. PKR equivalents on the /roi page use AKUH 2025 published case rates rather than this paper directly.
8
AKUH Cost Reference · Pakistan Setting
Aga Khan University Hospital published procedure rates

Published institutional rates for common elective procedures at Aga Khan University Hospital, Karachi, used as the reference point for the PKR cost figures used by SynaptoFlow ROI calculations. General-ward laparoscopic cholecystectomy package rate cited as approximately PKR 277,000 in 2025.

Journal: Aga Khan University Hospital, Pakistan
Citation: AKUH published package rates and procedure pricing, 2025. Available on AKUH official patient services pages.
Source for PKR-denominated case-cost figures in SynaptoFlow ROI calculations. Used in place of US dollar studies for Pakistan-context numbers.
⚠️

Forward-looking projections notice: The compliance improvement figures cited by SynaptoFlow are estimates derived from published literature in comparable settings, not from a controlled trial of SynaptoFlow itself.

We are committed to conducting prospective outcome studies as our user base grows. Healthcare providers should evaluate SynaptoFlow based on their own clinical experience and patient population.

Full references available upon request: synaptonex@gmail.com

SynaptoFlow · SynaptoNex