OBJECTIVES: The aim of this study was to investigate the long-term effects of computer-assisted CiTM navigation on clinical, radiological, and functional results versus conventional total knee arthroplasty (TKA). PATIENTS AND METHODS: Between January 2005 and July 2011, a total of 85 patients (36 males, 49 females; mean age: 66.2±5.2 years; range, 59 to 84 years) who underwent P.F.C. SigmaTM knee system implantation using computer-assisted CiTM navigation system (BrainLAB®, DePuy International, Leeds, UK) and completed a minimum follow-up of eight years were included in the study. In the control group, a total of 100 patients (40 males, 60 females; mean age: 68.3±3.9 years; range, 60 to 79 years) who completed a minimum follow-up of eight years were randomly selected from a dataset of implanted P.F.C. SigmaTM knee systems in the same period using Specialist® 2 instrumentation without navigation. An implant survival analysis was used to compare implant survivorship between the groups throughout 12 years. The Knee Society Score (KSS) and range of motion (ROM) were assessed. Based on long-format X-ray images, the implant position in the frontal and sagittal planes was evaluated. RESULTS: The ratio for navigation to control group survival is approximately 1.01 at 12 years. The clinical outcomes showed no significant difference between the groups (knee scores, p=0.707 and functional scores, p=0.485). In the measured angles analysis, we observed a consistent pattern in both groups. In the control group, there was a trend toward implanting the tibial component with slight varus alignment (p=0.038) and a higher posterior slope (p<0.001). On average, the operation was prolonged by 13 min in the navigated group (p<0.001). CONCLUSION: In conclusion, our study results demonstrate that while kinematic navigation in TKA improves the precision of implant alignment, it does not provide significant benefits in terms of long-term implant survival or functional outcomes compared to conventional TKA methods. The use of the computer-assisted CiTM navigation system is associated with prolonged operation duration, although no technical complications related to the navigation device's software can be observed. Therefore, although navigation offers theoretical advantages in component positioning, its use may be more justifiable in cases with challenging alignment requirements rather than as a routine practice.

• MeSH
• artróza kolenních kloubů * chirurgie   patofyziologie   diagnostické zobrazování   MeSH
• časové faktory MeSH
• chirurgie s pomocí počítače * škodlivé účinky   metody   přístrojové vybavení   MeSH
• kolenní kloub * chirurgie   diagnostické zobrazování   patofyziologie   MeSH
• lidé středního věku MeSH
• lidé MeSH
• následné studie MeSH
• obnova funkce MeSH
• protézy kolene MeSH
• retrospektivní studie MeSH
• rozsah kloubních pohybů MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• totální endoprotéza kolene * metody   přístrojové vybavení   škodlivé účinky   MeSH
• výsledek terapie MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• srovnávací studie MeSH

PURPOSE OF THE STUDY The study aims to evaluate the long-term results of computer-navigated total knee arthroplasties performed by less experienced surgeon performing a small number of procedures per year. MATERIAL AND METHODS In the prospective randomised study functional and radiological results, rate of revision and probability of clinical and radiological survival were compared in 30 computer-navigated (in 28 patients: 19 women, 9 men, with the mean age of 66.9 years) and 31 conventionally implanted (in 30 patients: 27 women, 3 men, with the mean age of 66.5 years) cemented total knee replacements without patellar resurfacing. The group was composed of patients who underwent surgery performed by the same surgeon who at the time of enrolment of patient in the study had no previous experience with the total knee replacement surgery and performed up to 30 such procedures annually. The mean follow-up of patients was 11 years. RESULTS No statistically significant differences were detected regarding the mean age, sex, body mass index and etiology of osteoarthritis of the operated knee. The mean duration of computer-navigated surgeries (101±14.1; 80-140 min) was considerably longer than the duration of conventional joint replacements (94±8.2; 80-100 min; p = 0.01). When evaluating the radiological results, a statistically significant difference was found between the groups only with respect to the mean value of dorsal inclination of the tibial component (88.2 ̊±2.1 vs 86.2 ̊±3, p = 0.02). The mean values of other monitored angles did not show any significant differences. The number of correct implants (with a deviation of 3 degrees from the target values) was statistically significantly higher in the group of computer-navigated joint replacement surgeries in all the monitored parameters (aFT: 87% vs. 67%, p = 0.04; α: 87% vs. 71%, p = 0.04; β: 87% vs. 65%, p = 0.03; γ: 93% vs. 74%, p = 0.02; δ: 90% vs. 77%, p = 0.04). Radiologic signs of unstable fixation were detected in 2 cases of computer-navigated joint replacement surgeries and in 7 cases of conventional replacements. Cumulative probability of radiologic survival at 10 years reached 93% in the compute-navigated surgery and 77.4% (p = 0.047) in the group with conventional procedure. In total, 4 revision surgeries with a reimplantation of at least one prosthetic component were reported. All the cases came from the conventional implantation group due to aseptic loosening of the endoprosthesis. In the computer-navigated group, one revision was performed for patellar pain, without replacing or adding any endoprosthetic component. The probability of clinical survival in computer-navigated replacements after 10 years was 100%, in conventional total knee replacements it was 87% (p = 0.04). The cumulative total endoprosthesis revision rate in the computer-navigated group was 3.3%, whereas in the group with conventional total knee replacements it was 12.9% (p = 0.04). The clinical assessment based on the WOMAC and Knee Society Scores showed no statistically significant differences. DISCUSSION The most common cause of the failure of total knee arthroplasties is the malposition of implants which results in early aseptic loosening. The radiologically correct position of knee endoprosthesis is seen in 80% of standard replacement surgeries performed by experienced surgeons. The potential error rate can even increase if the arthroplasties are performed by less experienced orthopaedic surgeons. The computer-navigated total knee replacement was introduced to make the position of implants more accurate. However, the question remains unanswered if more accurate positioning of the implants achieved with computer navigation decrease the revision rate and extend the long-term survival of knee endoprostheses. CONCLUSIONS Kinematic computer navigation allowed a less experienced and low-volume orthopaedic surgeon to make the implantation of endoprostheses more accurate, to decrease the total revision rate, and thus to ensure a higher probability of long-term survival of total knee arthroplasties. Key words:computer navigation, total replacement, knee joint, long-term outcomes, low-volume surgeon, less experienced surgeon.

• MeSH
• chirurgie s pomocí počítače * škodlivé účinky   metody   MeSH
• dlouhodobé vedlejší účinky prevence a kontrola   MeSH
• hodnocení výsledků zdravotní péče MeSH
• klinické kompetence normy   MeSH
• lidé MeSH
• osteoartróza chirurgie   MeSH
• protézy kolene škodlivé účinky   MeSH
• selhání protézy etiologie   MeSH
• senioři MeSH
• totální endoprotéza kolene * škodlivé účinky   metody   MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• randomizované kontrolované studie MeSH

Aims: The objective of this study was to evaluate the mobility of the oesophagus and the stability of the three-dimensional (3D) model of the oesophagus using 3D rotational angiography (3DRA) of the left atrium (LA) and the oesophagus, fused with live fluoroscopy during catheter ablation for atrial fibrillation. Methods and results: From March 2015 to September 2015, 3DRA of the LA and the oesophagus was performed in 33 patients before catheter ablation for atrial fibrillation. Control contrast oesophagography was performed every 30 min. The positions of the oesophagograms and the 3D model of the LA and the oesophagus were repeatedly measured and compared with the spine. The average shift of the oesophagus ranged from 2.7 ± 2.2 to 5.0 ± 3.5 mm. The average real-time oesophageal shift ranged from 2.7 ± 2.2 to 3.8 ± 3.4 mm. No significant shift was detected until the 90th minute of the procedure. The average shift of the 3D model of the LA and the oesophagus ranged from 1.4 ± 1.8 to 3.3 ± 3.0 mm (right-left direction) and from 0.9 ± 1.2 to 2.2 ± 1.3 mm (craniocaudal direction). During the 2 h procedure, there were no significant shifts of the model. Conclusion: During catheter ablation for atrial fibrillation, there is no significant change in the position of the oesophagus until the 90th minute of the procedure and no significant shift in the 3D model of the LA and the oesophagus. The 3D model of the oesophagus reliably depicts the position of the oesophagus during the entire procedure.

• MeSH
• anatomická značka MeSH
• angiografie metody   MeSH
• časové faktory MeSH
• chirurgie s pomocí počítače škodlivé účinky   metody   MeSH
• délka operace MeSH
• ezofágus diagnostické zobrazování   MeSH
• fibrilace síní diagnostické zobrazování   patofyziologie   chirurgie   MeSH
• fluoroskopie MeSH
• intervenční radiografie metody   MeSH
• katetrizační ablace škodlivé účinky   metody   MeSH
• lidé středního věku MeSH
• lidé MeSH
• pohyb těles MeSH
• prediktivní hodnota testů MeSH
• prospektivní studie MeSH
• rentgenový obraz - interpretace počítačová * MeSH
• reprodukovatelnost výsledků MeSH
• senioři MeSH
• srdeční síně diagnostické zobrazování   patofyziologie   chirurgie   MeSH
• výsledek terapie MeSH
• zobrazování trojrozměrné * MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH

AIMS: Durable isolation of the pulmonary veins (PVs) remains the cornerstone of treatment for paroxysmal atrial fibrillation (PAF) and is also used in the treatment of some patients with persistent atrial fibrillation. Visually guided laser ablation (VGLA) has been proven to be safe and effective as a treatment for atrial fibrillation (AF). It has shown high levels of durable PV isolation (PVI), even in the hands of less experienced users. This paper presents the long-term clinical outcomes of all patients treated with VGLA over the course of 4 years in the world's most experienced centre: from early product feasibility work treating only PAF patients to our work using the commercially available product, when we also treated persistent AF patients. METHODS AND RESULTS: One hundred and ninety-four patients (63 females, mean age 61 years) with either a history of drug-refractory PAF (time since initial diagnosis: 60.73 months) or persistent AF (time since initial diagnosis: 62.75 months) were treated in our laboratory with VGLA between 7 January 2009 and 17 May 2013. Follow-up of all patients was consistent with our standard clinical practice with a 7-day Holter being performed at the first clinical visit between 4 and 6 months and, for most patients, again at 12 months post-procedure. Twelve lead electrocardiograms were performed at all clinical visits. Recurrence of AF is defined as any documented AF episode >30 s. Acute procedural results show that 692 veins were acutely isolated with a mean procedure and fluoroscopy time of 226 and 20.4 min, respectively. One hundred and seventy (158 PAF and 12 persistent AF) patients reached 1 year of follow-up, 130 (82.3%) patients remained free of AF in the PAF group, and 9 (75%) in the persistent group. Eighty-seven PAF patients have now reached 24 months follow-up and 66 (75.9%) remain free of AF. Fifty-four PAF patients have reached 36 months follow-up with 41 (75.9%) remaining free of AF. Thirty-two PAF patients have reached 48 months follow-up and 24 (75%) remain free of AF. The peri-procedural complications we encountered were phrenic nerve injury in four patients (2.06%), tamponade or pericardial effusion in one patient (0.51%), stroke or transient ischaemic attack in one patient (0.514%), and vascular injury in six patients (3.09%). We experienced no cases of PV stenosis or atrio-oesophageal fistula. CONCLUSION: Our single-centre experience using VGLA over 4 years shows that it can be used safely and effectively in normal clinical practice and gives high levels of acute PVI accompanied by good clinical outcomes, even after long-term follow-up.

• MeSH
• chirurgie s pomocí počítače škodlivé účinky   metody   MeSH
• endoskopie škodlivé účinky   metody   MeSH
• fibrilace síní diagnóza   chirurgie   MeSH
• kardiovaskulární chirurgické výkony škodlivé účinky   metody   MeSH
• laserová terapie škodlivé účinky   metody   MeSH
• lidé středního věku MeSH
• lidé MeSH
• longitudinální studie MeSH
• pooperační komplikace etiologie   prevence a kontrola   MeSH
• reprodukovatelnost výsledků MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• senzitivita a specificita MeSH
• venae pulmonales patologie   chirurgie   MeSH
• výsledek terapie MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• klinické zkoušky MeSH

Radikální prostatektomie je jednou z možností vysoce účinné léčby lokalizovaného karcinomu prostaty. S nárůstem incidence tohoto onemocnění se zvyšuje i počet těchto prováděných operací. V České republice stoupá informovanost o možnostech časného záchytu rakoviny prostaty zejména díky vyšetření PSA, včetně poměru jeho frakcí f/T. Stále narůstá počet pacientů v iniciální fázi tohoto onemocnění s nízkou hladinou celkového PSA. Právě tito pacienti hledají pro sebe co nejvýhodnější možnou léčbu, tzn. léčbu s co nejlepším onkologickým a funkčním výsledkem s minimálním rizikem možných komplikací. Zejména poranění rekta je jednou z obávaných komplikací, ale u zkušených operačních týmů je riziko této komplikace minimální.

Radical prostatectomy is one of the methods for a radical cure of localized prostate cancer. With the increasing occurrence of this disease the number of performed surgeries of this type increases too. Thanks to the growing awareness of the possibility of early recognition of prostate cancer by PSA in CR (including the f/T ratio) increasing numbers of patients look for help while still in the early stages of the disease (with a low total PSA value). These patients in particular seek optimal cure method, i.e., the method with the best oncological and functional outcome and minimal side effects or complications. One of the most feared complications is rectum injury but in the case of an operation performed by an experienced team the risk is minimal.

• Klíčová slova
• roboticky asistovaná radikální prostatektomie,
• MeSH
• chirurgie s pomocí počítače metody   škodlivé účinky   MeSH
• lidé MeSH
• miniinvazivní chirurgické výkony metody   škodlivé účinky   MeSH
• nádory prostaty chirurgie   MeSH
• peroperační komplikace * MeSH
• prostatektomie * metody   škodlivé účinky   MeSH
• rektum * zranění   MeSH
• retrospektivní studie MeSH
• robotika MeSH
• Check Tag
• lidé MeSH

BACKGROUND: Since the end of the 20th century, robot-assisted surgery has been finding its role among other minimally invasive methods. Vascular surgery seems to be another specialty in which the benefits of this technology can be expected. Our objective was to assess the learning curve of robot-assisted laparoscopic aortofemoral bypass grafting for aortoiliac occlusive disease in a group of 40 patients. METHODS: Between May 2006 and January 2010, 40 patients (32 men, 8 women), who were a median age of 58 years (range, 48-75 years), underwent 40 robot-assisted laparoscopic aortofemoral reconstructions. Learning curve estimations were used for anastomosis, clamping, and operative time assessment. For conversion rate evaluation, the cumulative summation (CUSUM) technique was used. Statistical analysis comparing the first and second half of our group, and unilateral-to-bilateral reconstructions were performed. RESULTS: We created 21 aortofemoral and 19 aortobifemoral bypasses. The median proximal anastomosis time was 23 minutes (range, 18-50 minutes), median clamping time was 60 minutes (range, 40-95 minutes), and median operative time was 295 minutes (range, 180-475 minutes). The 30-day mortality rate was 0%, and no graft or wound infection or cardiopulmonary or hepatorenal complications were observed. During the median 18-month follow-up (range, 2-48 months), three early graft occlusions occurred (7%). After reoperations, the secondary patency of reconstructions was 100%. Data showed a typical short learning curve for robotic proximal anastomosis creation with anastomosis and clamping time reduction. The operative time learning curve was flat, confirming the procedure's complexity. There were two conversions to open surgery. CUSUM analysis confirmed that an acceptable conversion rate set at 5% was achieved. Comparing the first and second half of our group, all recorded times showed statistically significant improvements. Differences between unilateral and bilateral reconstructions were not statistically significant. CONCLUSIONS: Our results show that the success rate of robot-assisted laparoscopic aortofemoral bypass grafting is high and the complication rate is low. Anastomosis creation, one of the main difficulties of laparoscopic bypass grafting, has been overcome using the robotic operating system and its learning curve is short. However, the endoscopic dissection of the aortoiliac segment remains the most difficult part of the operation and should be addressed in further development of the method to reduce the operative times. Long-term results and potential benefits of this minimally invasive method have to be verified by randomized controlled clinical trials.

• MeSH
• arteria femoralis chirurgie   MeSH
• arteria iliaca chirurgie   MeSH
• arteriální okluzní nemoci chirurgie   MeSH
• časové faktory MeSH
• chirurgie s pomocí počítače škodlivé účinky   MeSH
• hodnocení rizik MeSH
• Kaplanův-Meierův odhad MeSH
• klinické kompetence MeSH
• laparoskopie škodlivé účinky   MeSH
• lidé středního věku MeSH
• lidé MeSH
• motorické dovednosti MeSH
• nemoci aorty chirurgie   MeSH
• retrospektivní studie MeSH
• rizikové faktory MeSH
• robotika MeSH
• senioři MeSH
• stenóza MeSH
• transplantace cév škodlivé účinky   metody   MeSH
• učení MeSH
• výsledek terapie MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• Geografické názvy
• Česká republika MeSH