Piotr Krzysztof Kowalewski

Dr. Piotr Krzysztof Kowalewski

orcid

Research Focus & Metrics

Academic Career Length

12Years (2015-Present)

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

Representative Publications

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13 July 2017 in Obesity Surgery
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Journal Article
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PKPiotr Krzysztof Kowalewski
Piotr Krzysztof Kowalewski
RORobert Olszewski
Robert Olszewski
MWMaciej Stanisław Walędziak
Maciej Stanisław Walędziak
MJMichał R. Janik
Michał R. Janik
AKAndrzej Kwiatkowski
Andrzej Kwiatkowski
KPKrzysztof Paśnik
Krzysztof Paśnik
Introduction Sleeve gastrectomy (LSG) is one of the most popular bariatric procedures. We present our long-term results regarding weight loss, comorbidities, and gastric reflux disease. Material and Methods We identified patients who underwent LSG in our institution between 2006 and 2009. We revised the data, and the patients with outdated contact details were tracked with the national health insurance database and social media (facebook). Each of the identified patients was asked to complete an online or telephone survey covering, among others, their weight and comorbidities. On that basis, we calculated the percent total weight loss (%TWL) and percent excess weight loss (%EWL), along with changes in body mass index (ΔBMI). Satisfactory weight loss was set at >50% EWL (for BMI = 25 kg/m2). We evaluated type 2 diabetes (T2DM) and arterial hypertension (AHT) based on the pharmacological therapy. GERD presence was evaluated by the typical symptoms and/or proton pump inhibitor (PPI) therapy. Results One hundred twenty-seven patients underwent LSG between 2006 and 2009. One hundred twenty patients were qualified for this study. Follow-up data was available for 100 participants (47 female, 53 male). Median follow-up period reached 8.0 years (from 7.1 to 10.7). Median BMI upon qualification for LSG was 51.6 kg/m2. Sixteen percent of patients required revisional surgery over the years (RS group), mainly because of insufficient weight loss (14 Roux-Y gastric bypass—LRYGB; one mini gastric bypass, one gastric banding). For the LSG (LSG group n = 84), the mean %EWL was 51.1% (±22.3), median %TWL was 23.5% (IQR 17.7–33.3%), and median ΔBMI was 12.1 kg/m2 (IQR 8.2–17.2). Fifty percent (n = 42) of patients achieved the satisfactory %EWL of 50%. For RS group, the mean %EWL was 57.8% (±18.2%) and median %TWL reached 33% (IQR 27.7–37.9%). Sixty-two percent (n = 10) achieved the satisfactory weight loss. Fifty-nine percent of patients reported improvement in AHT therapy, 58% in T2DM. After LSG, 60% (n = 60) of patients reported recurring GERD symptoms and 44% were treated with proton pomp inhibitors (PPI). In 93% of these cases, GERD has developed de novo. Conclusions Isolated LSG provides fairly good effects in a long-term follow-up with mean %EWL at 51.1%. Sixteen percent of patients require additional surgery due to insufficient weight loss. More than half of the subjects observe improvement in AHT and T2DM. Over half of the patients complain of GERD symptoms, which in most of the cases is a de novo complaint.

24 May 2022 in The Lancet Global Health
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Journal Article
Open access
CSCatherine A Shaw
Catherine A Shaw
RPRiinu Pius
Riinu Pius
TDThomas M Drake
Thomas M Drake
LNLisa Norman
Lisa Norman
AAAdesoji O Ademuyiwa
Adesoji O Ademuyiwa
JLJean Wilguens Lartigue
Jean Wilguens Lartigue
Early death after cancer surgery is higher in low-income and middle-income countries (LMICs) compared with in high-income countries, yet the impact of facility characteristics on early postoperative outcomes is unknown. The aim of this study was to examine the association between hospital infrastructure, resource availability, and processes on early outcomes after cancer surgery worldwide. A multimethods analysis was performed as part of the GlobalSurg 3 study—a multicentre, international, prospective cohort study of patients who had surgery for breast, colorectal, or gastric cancer. The primary outcomes were 30-day mortality and 30-day major complication rates. Potentially beneficial hospital facilities were identified by variable selection to select those associated with 30-day mortality. Adjusted outcomes were determined using generalised estimating equations to account for patient characteristics and country-income group, with population stratification by hospital. Between April 1, 2018, and April 23, 2019, facility-level data were collected for 9685 patients across 238 hospitals in 66 countries (91 hospitals in 20 high-income countries; 57 hospitals in 19 upper-middle-income countries; and 90 hospitals in 27 low-income to lower-middle-income countries). The availability of five hospital facilities was inversely associated with mortality: ultrasound, CT scanner, critical care unit, opioid analgesia, and oncologist. After adjustment for case-mix and country income group, hospitals with three or fewer of these facilities (62 hospitals, 1294 patients) had higher mortality compared with those with four or five (adjusted odds ratio [OR] 3·85 [95% CI 2·58–5·75]; p<0·0001), with excess mortality predominantly explained by a limited capacity to rescue following the development of major complications (63·0% vs 82·7%; OR 0·35 [0·23–0·53]; p<0·0001). Across LMICs, improvements in hospital facilities would prevent one to three deaths for every 100 patients undergoing surgery for cancer. Hospitals with higher levels of infrastructure and resources have better outcomes after cancer surgery, independent of country income. Without urgent strengthening of hospital infrastructure and resources, the reductions in cancer-associated mortality associated with improved access will not be realised. National Institute for Health and Care Research.

27 October 2016 in Obesity Surgery
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Journal Article
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PKPiotr Krzysztof Kowalewski
Piotr Krzysztof Kowalewski
RORobert Olszewski
Robert Olszewski
AKAndrzej Kwiatkowski
Andrzej Kwiatkowski
NGNatalia Gałązka-Świderek
Natalia Gałązka-Świderek
KCKrzysztof Cichoń
Krzysztof Cichoń
KPKrzysztof Paśnik
Krzysztof Paśnik
Laparoscopic adjustable gastric banding (LAGB) is the third most popular bariatric procedure worldwide. Various authors present ambivalent long-term follow up results.

21 June 2019 in Obesity Surgery
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Journal Article
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PKPiotr Krzysztof Kowalewski
Piotr Krzysztof Kowalewski
TRTomasz G. Rogula
Tomasz G. Rogula
ALAriel Ortiz Lagardere
Ariel Ortiz Lagardere
HKHaris A. Khwaja
Haris A. Khwaja
MWMaciej Stanisław Walędziak
Maciej Stanisław Walędziak
MJMichał R. Janik
Michał R. Janik
Our goal was to present the experience of bariatric surgeons with medical tourism on a global scale.

23 October 2018 in Obesity Surgery
Verified
Journal Article
Open access
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PMPaweł Marczuk
Paweł Marczuk
MKMichał J. Kubisa
Michał J. Kubisa
MŚMichał Święch
Michał Święch
MWMaciej Stanisław Walędziak
Maciej Stanisław Walędziak
PKPiotr Krzysztof Kowalewski
Piotr Krzysztof Kowalewski
MJMichał R. Janik
Michał R. Janik
As the population ages, there is more interest in bariatric surgery for older patients. There are controversies regarding the safety and effectiveness of surgical weight loss in this population.

19 August 2018 in Videosurgery and Other Miniinvasive Techniques
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Journal Article
Open access
MWMaciej Stanisław Walędziak
Maciej Stanisław Walędziak
ARAnna M Różańska-Walędziak
Anna M Różańska-Walędziak
PKPiotr Krzysztof Kowalewski
Piotr Krzysztof Kowalewski
MJMichal R Janik
Michal R Janik
JBJakub Brągoszewski
Jakub Brągoszewski
MMMaciej Matłok
Maciej Matłok
Introduction: As obesity has become a major health problem in Poland and bariatric procedures are the best way of treatment, an increasing trend has been observed in Polish bariatric surgery for the last decade. Aim: Our purpose was to provide an updated overview of the bariatric surgical procedures performed in Polish institutions in comparison to the situation in Europe as well as to analyze the trends in Polish bariatric surgery over the last decades. Material and methods: A questionnaire about the number and type of bariatric procedures performed in 2016 was sent to all Polish surgical departments. Two hundred and sixty surgical departments returned the questionnaires. Results: Twenty-seven departments reported having performed bariatric operative or endoscopic procedures in 2016. The total number of procedures reported was 1958, the most popular being the laparoscopic sleeve gastrectomy (LSG). More than 99% of procedures were performed using laparoscopic techniques. The most common operations were: LSG (64.6%, n = 1032) and laparoscopic Roux-en-Y gastric bypass (LRYGB) (18.2%; n = 291), followed by one anastomosis gastric bypass (OAGB) (8.3%; n = 132) and laparoscopic adjustable gastric banding (LAGS) (7.3%; n = 117). Conclusions: Registers of bariatric procedures provide information that helps in planning treatment and predicting possible complications. Adequate reporting of bariatric procedures is necessary to present the importance of the high incidence of obesity and the importance of its treatment. To collect reliable data, a national Polish bariatric surgery registry should be created.