Antonios Koutalos

Prof. Antonios Koutalos

University of Thessaly, Larissa, Greece
orcid

Research Focus & Metrics

Academic Career Length

14Years (2013-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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18 September 2024 in Knee Surgery, Sports Traumatology, Arthroscopy
Verified
Journal Article
Open access
Nifon K. GkekasNifon K. Gkekas
Nifon K. Gkekas
GKGeorgios A Komnos
Georgios A Komnos
TMTheodoros Mylonas
Theodoros Mylonas
Georgios ChalatsisGeorgios Chalatsis
Georgios Chalatsis
Antonios KoutalosAntonios Koutalos
Antonios Koutalos
MHMichael Hantes
Michael Hantes
Purpose: This study aimed to evaluate the long‐term outcomes of medial open wedge high tibial osteotomy (MOWHTO) as a treatment option for advanced medial compartment knee osteoarthritis (OA) Kellgren–Lawrence (K‐L) III and IV.Methods: Patients with severe medial compartment arthritis, who underwent MOWHTO with locking plate between 2003 and 2015, were retrospectively reviewed. A locking plate for the osteotomy was utilized. Preoperative and postoperative patients’ evaluation was performed using the International Knee Documentation Committee Score (IKDC), the Oxford Knee Score (OKS), the Knee Injury Osteoarthritis Outcome Score (KOOS) and the Short Form‐12 Score (SF‐12). Standardized standing whole‐limb X‐rays were taken to evaluate the mechanical tibiofemoral angle (mTFA) and proximal medial tibial angle (PMTA), and the severity of OA.Results: A total of 32 patients, 35 knees (27 males, five females) of which 21 were classified as K‐L Grade III and 14 as K‐L Grade IV, and mean age 47.1 ± 9.17 years old, who were followed for 13.6 years (range 7–20 years), were included in the study. During the follow‐up period, three knees required conversion to total knee replacement (91.5% survival rate). All clinical outcome scores (KOOS, OKS, IKDC and SF‐12) showed a significant improvement compared to preoperative status (p < 0.05). Preoperative mTFA and PMTA were significantly corrected immediately after surgery and retained this improvement at the last follow‐up.Conclusion: MOWHTO with a locking plate is an effective method to treat severe medial compartments. Clinical and radiological results are satisfactory and the survival rate is 91.5%, at a mean follow‐up of 13.6 years after the procedure.Level of Evidence: Level IV.

21 April 2022 in International Journal of Infectious Diseases
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Journal Article
Open access
Antonios KoutalosAntonios Koutalos
Antonios Koutalos
NSNIKOLAOS STEFANOU
NIKOLAOS STEFANOU
KMKonstantinos N. Malizos
Konstantinos N. Malizos
Recovery from COVID-19 is not always uneventful, especially in critically ill hospitalized patients. Persistent symptoms including fatigue/ weakness, shortness of breath, anxiety, and depression have been described at one-year follow-up. Furthermore, symptoms from the musculoskeletal system like joint pain or stiffness are underreported in studies with long-term follow-up of up to one year. Infection with SARS-CoV-2 itself has been associated with endothelial damage, and together with high-dose corticosteroid treatment, it is predisposed to the dissemination of microthrombi and the development of femoral head osteonecrosis (FHOn), as it has been shown during the previous (2003–2004) coronavirus outbreaks. A resurgence of FHOn cases is anticipated but this is not reflected in the existing studies with long-term follow-up. Prompt diagnosis is critical for early treatment and possibly for the hip joint preservation. Patients with COVID-19 treated with corticosteroids should be screened for avascular necrosis early after discharge from the hospital. Every healthcare worker involved in the management of these patients should maintain a high level of suspicion and should be alert when patients report symptoms such as vague aches at the buttocks, hip area, adductors, and/or above the knee. Studies are needed to identify risk factors for FHOn including disease severity, type of steroid, cumulative dose, and duration of treatment.

6 May 2020 in Microorganisms
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Journal Article
Open access
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Antonios KoutalosAntonios Koutalos
Antonios Koutalos
ADAthanasios Drakos
Athanasios Drakos
AFApo Fyllos
Apo Fyllos
NDNikos Doxariotis
Nikos Doxariotis
SVSokratis Varitimidis
Sokratis Varitimidis
KMKonstantinos Malizos
Konstantinos Malizos
The intra-articular use of tranexamic acid (TXA) has contributed to reduced blood loss in total joint arthroplasty (TJA). The purpose of this study is to assess the efficacy of simultaneously topical use of tranexamic acid and vancomycin powder within the TJA space. From 2016 to 2017, 219 consecutive total hip arthroplasties (THAs) and 272 total knee arthroplasties (TKAs) were performed in a tertiary care center, with a group of patients receiving intra-articular TXA and vancomycin, compared to patients receiving only TXA and to a control group that did not receive anything. Haemoglobin and hematocrit were measured preoperatively, on the first and third days. Transfusions and adverse events were recorded. Haemoglobin and hematocrit dropped significantly in all THA and TKA groups till the third day postoperatively, with a major reduction in the control group, compared to the other two treatment groups. Infections and thromboembolic events were similar in either group of the TJAs. In conclusion, the topical use of tranexamic acid mixed with the vancomycin powder within the joint space after the TJAs of the hip and knee did not alter the anti-fibrinolytic effect of TXA.

23 September 2021 in Journal of Bone and Joint Infection
Verified
Journal Article
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Antonios KoutalosAntonios Koutalos
Antonios Koutalos
CBChristos Baltas
Christos Baltas
VAVasileios Akrivos
Vasileios Akrivos
CAChristina Arnaoutoglou
Christina Arnaoutoglou
KMKonstantinos N. Malizos
Konstantinos N. Malizos
Introduction: Infection is a detrimental complication of operatively treated hip fractures. The objective of this retrospective case-control study was to evaluate the mortality, the physical function and the quality of life of hip fractures complicated with infection and determine risk factors for deep infection in hip fractures. Patients and methods: All patients with hip fractures (31A and 31B OTA/AO) that were operatively managed over a 10-year period that subsequently developed deep infection were included in the study. Thirty-nine patients met the inclusion criteria. These patients were compared with a matched control group of 198 patients without infection. Minimum follow-up was 1 year. Mortality, Barthel index score, EQ-5D-5L, Parker mobility score and visual analogue scale (VAS) pain score were compared between groups. Results: Mortality at 1 month was 20.5 % and 43 % at 1 year. Half of the infections were acute and 28 % were polymicrobial. Mortality was greater in the infection group (43 % vs. 16.5 %, p<0.0014), and Barthel index was inferior in the infection group (14 vs. 18, p<0.0017) compared to control group. Logistic regression analysis revealed that time from admission to surgery was a negative factor that predisposed to infection. Conclusions: Patients complicated with infection after a hip fracture have higher mortality and inferior functional results. Delay from admission to surgery predisposes to infection.

5 June 2013 in Knee Surgery, Sports Traumatology, Arthroscopy
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VASILEIOS KONTOGEORGAKOSVASILEIOS KONTOGEORGAKOS
VASILEIOS KONTOGEORGAKOS
Antonios KoutalosAntonios Koutalos
Antonios Koutalos
MHMichael Hantes
Michael Hantes
GMGregory Manoudis
Gregory Manoudis
LBLeonidas Badras
Leonidas Badras
KMKonstantinos Malizos
Konstantinos Malizos

13 August 2021 in European Journal of Orthopaedic Surgery & Traumatology
Verified
Journal Article
Closed access
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Antonios KoutalosAntonios Koutalos
Antonios Koutalos
Georgios ChalatsisGeorgios Chalatsis
Georgios Chalatsis
GVGeorgios Varsanis
Georgios Varsanis
KMKonstantinos Malizos
Konstantinos Malizos
TKTheofilos Karachalios
Theofilos Karachalios