@article{HamoudaOezkurSinhaetal.2015, author = {Hamouda, Khaled and Oezkur, Mehmet and Sinha, Bhanu and Hain, Johannes and Menkel, Hannah and Leistner, Marcus and Leyh, Rainer and Schimmer, Christoph}, title = {Different duration strategies of perioperative antibiotic prophylaxis in adult patients undergoing cardiac surgery: an observational study}, series = {Journal of Cardiothoracic Surgery}, volume = {10}, journal = {Journal of Cardiothoracic Surgery}, number = {25}, doi = {10.1186/s13019-015-0225-x}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-124977}, year = {2015}, abstract = {Background All international guidelines recommend perioperative antibiotic prophylaxis (PAB) should be routinely administered to patients undergoing cardiac surgery. However, the duration of PAB is heterogeneous and controversial. Methods Between 01.01.2011 and 31.12.2011, 1096 consecutive cardiac surgery patients were assigned to one of two groups receiving PAB with a second-generation cephalosporin for either 56 h (group I) or 32 h (group II). Patients' characteristics, intraoperative data, and the in-hospital follow-up were analysed. Primary endpoint was the incidence of surgical site infection (deep and superficial sternal wound-, and vein harvesting site infection; DSWI/SSWI/VHSI). Secondary endpoints were the incidence of respiratory-, and urinary tract infection, as well as the mortality rate. Results 615/1096 patients (56,1\%) were enrolled (group I: n = 283 versus group II: n = 332). There were no significant differences with regard to patient characteristics, comorbidities, and procedure-related variables. No statistically significant differences were demonstrated concerning primary and secondary endpoints. The incidence of DSWI/SSWI/VHSI were 4/283 (1,4\%), 5/283 (1,7\%), and 1/283 (0,3\%) in group I versus 6/332 (1,8\%), 9/332 (2,7\%), and 3/332 (0,9\%) in group II (p = 0,76/0,59/0,63). In univariate analyses female gender, age, peripheral arterial obstructive disease, operating-time, ICU-duration, transfusion, and respiratory insufficiency were determinants for nosocomial infections (all ≤ 0,05). Subgroup analyses of these high-risk patients did not show any differences between the two regimes (all ≥ 0,05). Conclusions Reducing the duration of PAB from 56 h to 32 h in adult cardiac surgery patients was not associated with an increase of nosocomial infection rate, but contributes to reduce antibiotic resistance and health care costs.}, language = {en} } @phdthesis{Hamouda2005, author = {Hamouda, Khaled}, title = {Lymphknotendissektion bei operativer Behandlung des Bronchial-Carcinoms}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-16939}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2005}, abstract = {Hintergrund der Studie ist die Untersuchung der Auswirkung systematischer Lymphadenektomie bei chirurgischer Sanierung von Bronchial-Carcinomen auf die 5-Jahres-{\"U}berlebensrate der Patienten und der Vergleich zwischen dem pr{\"a}operativ diagnostiziertem Tumorstadium und dem histologischem Befund. In der Studie werden die Daten von insgesamt 95 Patienten, die sich von 1996 bis 2001 einer Thorakotomie aufgrund eines Bronchial-Carcinoms unterziehen mussten, retrospektiv untersucht. Die 5-Jahres-{\"U}berlebensrate wurde nach Kaplan-Meier Methode errechnet. Es zeigte sich, dass der intra- sowie postoperative Verlauf durch die Lymphknotendissektion nicht beeintr{\"a}chtigt wurde. Trotz der gr{\"o}ßeren Wundfl{\"a}che, bedingt durch die Lymphknotenentfernung, ben{\"o}tigen 65\% der Patienten keine Erythrozytenkonzentrate, 25\% der Patienten ben{\"o}tigen 1-2 Konserven und bei den verbleibenden 10\% war die Transfusion von 3 oder mehr Erythrozytenkonzentraten notwendig. Die Operationszeit betrug im Durchschnitt 4.6 Stunden vom Hautschnitt bis zum Wundverschluss. Der Vergleich zwischen dem radiologischem und dem histologischem Tumorstadium zeigte bei N0-Stadium eine 64\%ige, bei N1-Stadium eine 91\%ige und bei N2-Stadium eine 35\%ige {\"U}bereinstimmung. Bez{\"u}glich der Lymphknotenmetastasierung wurde bei den Patienten ein regelm{\"a}ßiges {\"U}berspringen von Lymphknotenlevel beobachtet. Dies ist am ehesten durch Querverbindungen zwischen den einzelnen Stationen zu erkl{\"a}ren. Es muss daher immer eine komplette Lymphknotendisektion durchgef{\"u}hrt werden. Es zeigte sich kein Zusammenhang zwischen der Tumorlokalisation und einem bestimmten Befallmuster von Lymphknotenlevel. Die 5-Jahres-{\"U}berlebensrate lag bei 50,4 \%. Die 5-Jahres-{\"U}berlebensrate ist signifikant abh{\"a}ngig vom Lymphknotenstatium und in geringem Maße vom Tumorstadium. Patienten mit N2-Stadium erzielten eine 5-Jahres-{\"U}berlebensrate von 15\%, w{\"a}hrend Patienten mit N0-Stadium eine 5-Jahres-{\"U}berlebensrate von 57\% zeigten. Patienten mit linksseitigem Tumorbefall hatten eine 5-Jahres-{\"U}berlebensrate von 47,56 \%, Patienten mit rechtsseitigem Tumorbefall 51,9 \%. Somit konnte eine seitenunterschiedliche Prognose in unserer Untersuchung nicht best{\"a}tigt werden. Die vorliegende Studie konnte die Hypothese der Verschlechterung der Langzeitprognose durch die intraoperative Gabe von Erythrozytenkonzentraten best{\"a}tigen. Wenn m{\"o}glich, sollte daher auf eine Blutgabe intraoperativ verzichtet werden.}, language = {de} } @article{BeningHamoudaOezkuretal.2017, author = {Bening, Constanze and Hamouda, Khaled and Oezkur, Mehmet and Schimmer, Christoph and Schade, Ina and Gorski, Armin and Aleksic, Ivan and Leyh, Rainer}, title = {Rapid deployment valve system shortens operative times for aortic valve replacement through right anterior minithoracotomy}, series = {Journal of Cardiothoracic Surgery}, volume = {12}, journal = {Journal of Cardiothoracic Surgery}, number = {27}, doi = {10.1186/s13019-017-0598-0}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-159439}, year = {2017}, abstract = {Background: There is growing evidence from the literature that right anterior minithoracotomy aortic valve replacement (RAT-AVR) improves clinical outcome. However, increased cross clamp time is the strongest argument for surgeons not performing RAT-AVR. Rapid deployment aortic valve systems have the potential to decrease cross-clamp time and ease this procedure. We assessed clinical outcome of rapid deployment and conventional valves through RAT. Methods: Sixty-eight patients (mean age 76 ± 6 years, 32\% females) underwent RAT-AVR between 9/2013 and 7/2015. According to the valve type implanted the patients were divided into two groups. In 43 patients (R-group; mean age 74.1 ± 6.6 years) a rapid deployment valve system (Edwards Intuity, Edwards Lifesciences Corp; Irvine, Calif) and in 25 patients (C-group; mean age 74.2 ± 6.6 years) a conventional stented biological aortic valve was implanted. Results: Aortic cross-clamp (42.1 ± 12 min vs. 68.3 ± 20.3 min; p < 0.001) and bypass time (80.4 ± 39.3 min vs. 106.6 ± 23.2 min; p = 0.001) were shorter in the rapid deployment group (R-group). We observed no differences in clinical outcome. Postoperative gradients (R-group: max gradient, 14.3 ± 8 mmHg vs. 15.5 ± 5 mmHg (C-group), mean gradient, 9.2 ± 1.7 mmHg (R-group) vs. 9.1 ± 2.3 mmHg (C-group) revealed no differences. However, larger prostheses were implanted in C-group (25 mm; IQR 23-27 mm vs. 23 mm; IQR 21-25; p = 0.009). Conclusions: Our data suggest that the rapid deployment aortic valve system reduced cross clamp and bypass time in patients undergoing RAT-AVR with similar hemodynamics as with larger size stented prosthesis. However, larger studies and long-term follow-up are mandatory to confirm our findings.}, language = {en} } @article{RadakovicPenovHamoudaetal.2022, author = {Radakovic, Dejan and Penov, Kiril and Hamouda, Khaled and Madrahimov, Nodir and Radakovic, Darko and Bening, Constanze and Leyh, Rainer G. and Aleksic, Ivan}, title = {Benefits of intra-aortic balloon pump support in patients with postcardiotomy shock requiring venoarterial extracorporeal membrane oxygenation}, series = {Life}, volume = {12}, journal = {Life}, number = {8}, issn = {2075-1729}, doi = {10.3390/life12081195}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-286241}, year = {2022}, abstract = {Background: The benefit of the combined use of an intra-aortic balloon pump (IABP) and venoarterial extracorporeal membrane oxygenation (VA-ECMO) for postcardiotomy shock remains unclear. We aimed to analyse the potential benefits and safety of combining these two devices. Methods: We enrolled 200 patients treated with either VA-ECMO only or in combination with IABP (ECMO-I group) between January 2012 and January 2021. To adjust the patients' backgrounds, we used propensity score matching for additional analyses, resulting in 57 pairs. The primary endpoint was 30-day survival. Secondary endpoints included successful weaning and complication rates. We also analysed hemodynamic parameters in both groups. Results: After propensity score matching, 30-day survival was better in the ECMO-I group (log-rank p = 0.004). The ECMO-I and ECMO-only groups differed regarding the secondary endpoints, including successful weaning (50.9\% and 26.3\%, respectively; p = 0.012) and the need for continuous renal replacement therapy (28.1\% and 50.9\%, p = 0.021). Complication rates were not statistically different between the two groups. Conclusion: Compared to VA-ECMO alone, the combined use of VA-ECMO and IABP is beneficial regarding 30-day survival in selected patients with postcardiotomy shock; successful ECMO weaning and freedom from renal replacement therapy is more common in patients supported with VA-ECMO plus IABP.}, language = {en} }