KONSTANTINOS POTARIS

Dr. KONSTANTINOS POTARIS


Research Focus & Metrics

Academic Career Length

25Years (2002-Present)

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

Representative Publications

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1 June 2002 in Asian Cardiovascular and Thoracic Annals
Verified
Journal Article
Open access
PDF file
KPKONSTANTINOS POTARIS
KONSTANTINOS POTARIS
JGJohn Gakidis
John Gakidis
PMPeter Mihos
Peter Mihos
VVValsamakis Voutsinas
Valsamakis Voutsinas
ADAnastasios Deligeorgis
Anastasios Deligeorgis
VPVasilios Petsinis
Vasilios Petsinis
A review of the management of 239 patients with sternal fractures in a busy trauma center between October 1989 and May 2000 was undertaken to determine the incidence, significance, morbidity, and mortality of this injury. There were 140 men and 99 women with a mean age of 50.3 years (range, 15 to 93 years). Sternal fractures accounted for 8% of admissions for thoracic trauma. The causes were motor vehicle collisions in 215 patients (90%) and falls or direct blows in 24 (10%). Only 64 of 204 car accident patients (31%), 28 men and 36 women, were restrained by seat belts. Complications developed in 13 patients (5.4%). Mortality rate was 0.8%. Mean length of stay in the ward was 6.4 days (range, 1 to 32 days). Four patients (1.7%) underwent surgery. The results show that isolated sternal fractures have low associated morbidity and mortality. Admission is justified for the management of pain and treatment of cardiac complications and concomitant injuries.

17 March 2014 in Asian Cardiovascular and Thoracic Annals
Verified
Journal Article
Closed access
KPKONSTANTINOS POTARIS
KONSTANTINOS POTARIS
AAAthanasios Athanasiou
Athanasios Athanasiou
MKMarios Konstantinou
Marios Konstantinou
PZParaskevi Zaglavira
Paraskevi Zaglavira
DTDimitrios Theodoridis
Dimitrios Theodoridis
KSKonstantinos N Syrigos
Konstantinos N Syrigos
We aimed to consolidate our clinical observations regarding the development of pulmonary hypertension following pneumonectomy for lung cancer. Sixty-nine of 82 initially selected patients without pulmonary or cardiac comorbidities, who underwent pneumonectomy for lung cancer between October 2009 and October 2011, accomplished our protocol. Mean patient age was 60.6 years (range 44–78 years) and 10.1% were women. Postoperative complications occurred in 16 (23.2%) patients. Mortality at 1, 12, and 18 months postoperatively was 4.3%, 15.9%, and 29%, respectively. One year postoperatively, 37.9% of patients developed mild to moderate pulmonary hypertension and 3.4% had severe pulmonary hypertension. The calculated mean pulmonary artery systolic pressure at 1, 6, and 12 months postoperatively was 21.9 ± 6.6, 27.3 ± 9.3, and 34.1 ± 14 mm Hg, respectively (p < 0.001). Receiver operating characteristic curve analysis showed a cutoff point at 35.5 mm Hg for late postoperative (at 12 months) pulmonary artery systolic pressure (sensitivity 80%, specificity 82%; p < 0.001) related to suboptimal clinical outcomes (decreased performance status or death), with a detected 18-fold risk for these patients (p < 0.001). Pulmonary hypertension may occur after pneumonectomy with its known adverse effects. Patients with late postoperative pulmonary artery systolic pressure > 35.5 mm Hg are at higher risk of a suboptimal clinical outcome.

21 March 2023 in Cancers
Verified
Journal Article
Open access
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Athina MarkouAthina Markou
Athina Markou
DLD. Londra
D. Londra
DSDimitra Stergiopoulou
Dimitra Stergiopoulou
IVI. Vamvakaris
I. Vamvakaris
KPKONSTANTINOS POTARIS
KONSTANTINOS POTARIS
Evi S. LianidouEvi S. Lianidou
Evi S. Lianidou
Purpose: We assessed whether preoperativemutational analyses of circulating tumor cells (CTCs) and plasma-cfDNA could be used as minimally invasive biomarkers and as complimentary tools for early prediction of relapse in early-stage non-small -cell lung cancer (NSCLC). Experimental Design: Using ddPCR assays, hotspot mutations of BRAF, KRAS, EGFR and PIK3CA were identified in plasma-cfDNA samples and size-based enriched CTCs isolated from the same blood samples of 49 early-stage NSCLC patients before surgery and in a control group of healthy blood donors (n= 22). Direct concordance of the mutational spectrum was further evaluated in 27 patient-matched plasma-cfDNA and CTC-derived DNA in comparison to tissue-derived DNA. Results: The prevalence of detectable mutations of the four tested genes was higher in CTC-derived DNA than in the corresponding plasma-cfDNA (38.8% and 24.5%, respectively).The most commonly mutated gene was PIK3CA, in both CTCs and plasma-cfDNA at baseline and at the time of relapse. Direct comparison of the mutation status of selected drug-responsive genes in CTC-derived DNA, corresponding plasma-cfDNA and paired primary FFPE tissues clearly showed the impact of heterogeneity both within a sample type, as well as between different sample components. The incidence of relapse was higher when at least one mutation was detected in CTC-derived DNA or plasma-cfDNA compared with patients in whom no mutation was detected (p =0.023). Univariate analysis showed a significantly higher risk of progression (HR: 2.716; 95% CI, 1.030–7.165; p =0.043) in patients with detectable mutations in plasma-cfDNA compared with patients with undetectable mutations, whereas the hazard ratio was higher when at least one mutation was detected in CTC-derived DNA or plasma-cfDNA (HR: 3.375; 95% CI, 1.098–10.375; p =0.034). Conclusions: Simultaneous mutational analyses of plasma-cfDNA and CTC-derived DNA provided complementary molecular information from the same blood sample and greater diversity in genomic information for cancer treatment and prognosis. The detection of specific mutations in ctDNA and CTCs in patients with early-stage NSCLC before surgery was independently associated with disease recurrence, which represents an important stratification factor for future trials.

1 October 2007 in Surgical Infections
Verified
Journal Article
Closed access
KPKONSTANTINOS POTARIS
KONSTANTINOS POTARIS
PMPetros Mihos
Petros Mihos
IGIoannis Gakidis
Ioannis Gakidis
CCChristos Chatziantoniou
Christos Chatziantoniou
Purpose: To evaluate the outcomes of video-thoracoscopic and open surgical management of patients with thoracic empyema. Methods: We studied 122 patients retrospectively who underwent surgery for thoracic empyema in our hospital between January, 1999 and January, 2005. Patients' medical records, surgical procedures, and outcomes were reviewed. The study identified 97 affected men and 25 affected women with a mean age of 54 years (range 16–78 years). The empyema was parapneumonic in 95 patients (78%). Results: Forty-four patients who had stage II empyema underwent video-assisted thoracic surgery (VATS). The procedure was converted to thoracotomy in 13 patients (29.5%); the morbidity and mortality rates of VATS were 13% and 0, respectively. Seventy-eight patients had stage III empyema and, along with those 13 who were converted, underwent thoracotomy for decortication. The associated morbidity rate was 12%, and the mortality rate was 6.6%. Thoracotomy was considered successful in 90 of 91 patients (99%); one patient needed a reoperative thoracotomy for an organ space/surgical site infection with pus in the pleural cavity. Conclusions: Many treatment modalities are available for thoracic empyema, depending on the results of appropriate clinical and laboratory investigations. In fibrinopurulent empyema, VATS debridement is safe and effective, with minimal morbidity and no deaths. Lung decortication via thoracotomy is the only option for organized empyema and is associated with a substantial mortality rate.

1 July 2003
Verified
Journal Article
Closed access
KPKONSTANTINOS POTARIS
KONSTANTINOS POTARIS
PMPeter Mihos
Peter Mihos
IGIoannis Gakidis
Ioannis Gakidis

15 April 2016 in Medical Science Monitor
Verified
Journal Article
Open access
PDF file
FKFroso Konstantinou
Froso Konstantinou
KPKONSTANTINOS POTARIS
KONSTANTINOS POTARIS
KSKonstantinos Syrigos
Konstantinos Syrigos
PTPanteleimon Tsipas
Panteleimon Tsipas
GKGrigorios Karagkiouzis
Grigorios Karagkiouzis
MKMarios Konstantinou
Marios Konstantinou
BACKGROUND:Persistent air leak following pulmonary lobectomy can be very difficult to treat and results in prolonged hospitalization. We aimed to evaluate the efficacy of a new method of postoperative air leak management using intrapleurally infused ...