Surgery Scheduling Under Case Cancellation and Surgery Duration Uncertainty

Purpose: Traditionally acceptable methods of anesthesia for vitrectomy surgery are quite varied. However, each of these methods has its own potential for complications that can range from minor to severe. The surgery procedure of vitrectomy for symptomatic vitreous floaters is much simpler, mainly reflecting in the nonuse of sclera indentation, photocoagulation, and the apparently short surgery duration. The use of 27-gauge cannulae makes the puncture of the sclera minimally invasive. Hence, retrobulbar anesthesia, due to its rare but severe complications, seemed excessive for this kind of surgery. Method: Three cases of 27-gauge, sutureless pars plana vitrectomy for symptomatic vitreous floaters with topical anesthesia are reported. Results: The vitrectomy surgeries were successfully performed with topical anesthesia (proparacaine, 0.5%) without operative or postoperative complications. Furthermore, none of the patients experienced apparent pain during or after the surgery. Conclusion: Topical anesthesia can be considered for 27-guage vitrectomy in patients with symptomatic vitreous floaters.

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Pros and cons of navigated versus conventional total knee arthroplasty—a retrospective analysis of over 2400 patients

Archives of Orthopaedic and Trauma Surgery ◽

10.1007/s00402-021-03834-y ◽

2021 ◽

Author(s):

Matthias Meyer ◽

Tobias Renkawitz ◽

Florian Völlner ◽

Achim Benditz ◽

Joachim Grifka ◽

...

Keyword(s):

Total Knee Arthroplasty ◽

Retrospective Analysis ◽

Outcome Measures ◽

Knee Arthroplasty ◽

Mechanical Axis ◽

Complication Rates ◽

Total Knee ◽

One Year ◽

Navigated Tka ◽

Surgery Duration

Abstract Introduction Because of the ongoing discussion of imageless navigation in total knee arthroplasty (TKA), its advantages and disadvantages were evaluated in a large patient cohort. Methods This retrospective analysis included 2464 patients who had undergone TKA at a high-volume university arthroplasty center between 2012 and 2017. Navigated and conventional TKA were compared regarding postoperative mechanical axis, surgery duration, complication rates, one-year postoperative patient-reported outcome measures (PROMs) (WOMAC and EQ-5D indices), and responder rates as defined by the criteria of the Outcome Measures in Rheumatology and Osteoarthritis Research Society International consensus (OMERACT-OARSI). Results Both navigated (1.8 ± 1.6°) and conventional TKA (2.1 ± 1.6°, p = 0.002) enabled the exact reconstruction of mechanical axis. Surgery duration was six minutes longer for navigated TKA than for conventional TKA (p < 0.001). Complication rates were low in both groups with comparable frequencies: neurological deficits (p = 0.39), joint infection (p = 0.42 and thromboembolic events (p = 0.03). Periprosthetic fractures occurred more frequently during conventional TKA (p = 0.001). One-year PROMs showed excellent improvement in both groups. The WOMAC index was statistically higher for navigated TKA than for conventional TKA (74.7 ± 19.0 vs. 71.7 ± 20.7, p = 0.014), but the increase was not clinically relevant. Both groups had a similarly high EQ-5D index (0.23 ± 0.24 vs. 0.26 ± 0.25, p = 0.11) and responder rate (86.5% [256/296] vs. 85.9% [981/1142], p = 0.92). Conclusion Both methods enable accurate postoperative leg alignment with low complication rates and equally successful PROMs and responder rates one year postoperatively. Level of evidence III. Retrospective cohort study.

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Stochastic optimization approaches for elective surgery scheduling with downstream capacity constraints: Models, challenges, and opportunities

Computers & Operations Research ◽

10.1016/j.cor.2021.105523 ◽

2022 ◽

Vol 137 ◽

pp. 105523

Author(s):

Karmel S. Shehadeh ◽

Rema Padman

Keyword(s):

Stochastic Optimization ◽

Elective Surgery ◽

Capacity Constraints ◽

Surgery Scheduling ◽

Challenges And Opportunities

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Results obtained after the surgical treatment of Graves’ disease depending on the levels of anti-thyroid antibodies

General Surgery ◽

10.30978/gs-2021-1-36 ◽

2021 ◽

Author(s):

S. L. Shliakhtych ◽

V. R. Antoniv

Keyword(s):

Surgical Treatment ◽

Postoperative Complications ◽

Surgical Technique ◽

Hormone Receptors ◽

Thyroid Stimulating Hormone ◽

Endocrine Surgery ◽

Graves Disease ◽

Autoimmune Thyroid ◽

Early Postoperative Complications ◽

Surgery Duration

Graves' disease (GD) is a hereditary autoimmune disease which is characterized by persistent abnormal hypersecretion of thyroid hormones and thyrotoxicosis syndrome development. GD affects from 0.5 % to 2.0 % of population in different regions. 46 % of these patients develop ophthalmopathy. GD is a common cause of disabilities in patients under 60 years of age. In recent years, the incidence of GD in Ukraine has increased by 9.9 % — from 106.2 to 117.9 per 100,000 individuals. This can be connected with the improved diagnostic possibilities and active disease detection as well as with the increased number of autoimmune thyroid disorders. The recent studies focus on prevention of specific complications and recurrences of GD after surgery. Objective — to compare the levels of antibodies to the thyroid‑stimulating hormone receptors (TSHR‑Ab) during different postoperative periods as well as the incidence of early and late complications depending on the surgical technique used for the treatment of GD. Materials and methods. The results of surgical treatment of 130 patients, with GD were compared. 29 male patients and 101 female patients aged from 19 to 76 (average — 44.1 ± 3.2 years), receiving their treatment for GD in Kyiv Center of Endocrine Surgery during 2010—2018, were randomly selected and divided into two groups. At the time of operation the duration of disease was from 1 to 30 years (average — 4.6 ± 1.2 years). Group 1 included 65 patients that underwent total thyreoidectomy (TT) and group 2 included 65 patients that underwent subtotal thyreoidectomy (ST). The following parameters were compared: surgery duration, the incidence of early postoperative complications, including bleedings and damage to the recurrent laryngeal nerves, and late outcomes of surgical treatment (persistent hypoparathyreoidism disorder and disorder recurrences) depending on the method of surgery (ST or TT). Furthermore, the patterns of the TSHR‑Ab level reduction were studied for different postoperative periods. Results. The comparison of surgical outcomes following TТ and ST didn’t reveal any statistically significant differences in such evaluation criteria as the average surgery duration, the average volume of intraoperative blood loss and the average duration of the postoperative inpatient treatment. The comparative assessment of the thyroid stump volume and the average amount of drained discharge showed statistically significant differences for TТ. It allows considering TТ as a surgery which causes less complications than ST. The studied parameters of early postoperative complications had no significant differences for ST and TТ. The long‑term (5 years) postoperative level of TSHR‑Ab was statistically significantly lower in patients after TT and made up 1.15 ± 0.13 IU/L (thus corresponding to the normal level). Conclusions. Total thyroidectomy is an optimal surgical technique and is more appropriate compared with subtotal thyroid gland resection. It should be noted that TT provides lower risk of complications due to significantly lower level of TSHR‑Ab in late postoperative period.

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Combating time-duration uncertainty of spectrum resources: A risk-reduced auction approach

2013 IEEE Global Communications Conference (GLOBECOM) ◽

10.1109/glocom.2013.6831191 ◽

2013 ◽

Author(s):

Guangen Wu ◽

Pinyi Ren ◽

Li Sun ◽

Qinghe Du

Keyword(s):

Time Duration ◽

Duration Uncertainty

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Implementation of a Situation Aware and Real-Time Approach for Decision Support in Online Surgery Scheduling

2018 IEEE 31st International Symposium on Computer-Based Medical Systems (CBMS) ◽

10.1109/cbms.2018.00079 ◽

2018 ◽

Cited By ~ 1

Author(s):

Norman Spangenberg ◽

Christoph Augenstein ◽

Bogdan Franczyk ◽

Moritz Wilke

Keyword(s):

Decision Support ◽

Real Time ◽

Surgery Scheduling

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P255 Predictors of postoperative morbidity in patients with inflammatory bowel disease

Journal of Crohn s and Colitis ◽

10.1093/ecco-jcc/jjz203.384 ◽

2020 ◽

Vol 14 (Supplement_1) ◽

pp. S277-S278

Author(s):

N Imperatore ◽

L Pellegrini ◽

L Bucci ◽

A Rispo ◽

A D Guarino ◽

...

Keyword(s):

Inflammatory Bowel Disease ◽

Wound Infection ◽

Anastomotic Leak ◽

Bowel Disease ◽

Disease Duration ◽

Intestinal Resection ◽

Operative Morbidity ◽

Urinary Infections ◽

Inflammatory Bowel ◽

Surgery Duration

Abstract Background More than half of patients suffering from inflammatory bowel disease (IBD) requires surgery in their lifetime. However, predictors of post-operative morbidity and mortality are poorly investigated. Our aim was to assess the predictors of post-operative mortality and morbidity in IBD. Methods retrospective cohort study enrolling all IBD subjects followed-up and operated at our tertiary IBD Centre from 2015 to 2018. For each patient, we evaluated patient-dependent (comorbidities, smoking, drugs, nutritional status), disease-dependent (disease duration, location, behaviour, extension), surgery-dependent variables (duration, emergency/election, laparoscopy/laparotomy, bowel/colic resection, length of intestinal resection). Results 158 subjects were operated during the period study (males 53.8%, Crohn’s disease 75.3%, mean age 41.9 + 16.2, disease duration 109.5 + 98.3 months); the majority (83%) underwent an elective surgery. No patient died. About morbidity, 40 (25.3%) developed post-operative complications: wound infection (8.9%), respiratory complications (6.9%), prolonged ileum (5.1%), anastomotic leak (3.2%), urinary infections (3.2%), abdominal abscess (3.2%), anastomotic bleeding (3.2%), other infections (2.5%), abdominal bleeding (1.9%), obstruction (1.3%). Two subjects (1.3%) required re-operation within 30 days. A surgery-duration <142 min was predictive for a better post-operative outcome (sensitivity 80%, specificity 42%, PPV 32%, NPV 85.9%). At binary logistic regression, stricturing/fistulizing behaviour (OR 3.7, 95% CI 1.6–6.4, p = 0.02), need for total parenteral nutrition (OR 4.1, 95% CI 2.4–9.2, p = 0.01), pre-operative bowel cleansing (OR 0.6, 95% CI 0.4–0.8, p = 0.01), surgery duration <142 min (OR 0.2, 95% CI 0.08–0.7, p = 0.03), were the only predictors for post-operative morbidities. A pre-operative BMI<24 was also predictive for anastomotic leak (OR 4.3, 95% CI 1.8–8.6, p = 0.02); pre-operative hypoalbuminemia was predictive for urinary infections (OR 2.5, 95% CI 1.8–7.9, p = 0.04); pre-operative infliximab was predictive for pneumonia (OR 3.8, 95% CI 2.2–6.3, p = 0.01); diabetes (OR 5.7, 95% CI 2.3–9.8, p < 0.01) and pre-operative steroids (OR 6.1, 95% CI 1.8–11.4, p < 0.01) were predictors of wound infection; need for TPN predicted prolonged ileum (OR 6.1, 95% CI 2.3–15.3, p = 0.03). Conclusion about a quarter of IBD patients undergoing surgery develops a post-operative complication, especially infective. Several patient-related, disease-related and surgery-related factors are predictive for post-operative morbidity. The recognition of these factors, as well the multidisciplinary approach (gastroenterologists, surgeons and nutritionists), and intensive preoperative management could be able to minimise these complications.

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