Recurrent Urinary Tract Infections due to Asymptomatic Colonic Diverticulitis

Colovesical fistula is a common complication of diverticulitis. Pneumaturia, fecaluria, urinary tract infections, abdominal pain, and dysuria are commonly reported. The authors report a case of colovesical fistula due to asymptomatic diverticulitis, and they emphasize the importance of deeply investigate recurrent urinary tract infection without any bowel symptoms. They also briefly review the literature

NUMERICAL SIMULATION OF THE LASER INDUCED SPALLATION TECHNIQUE: APPLICATION TO THE INTERFACE STRENGTH DETERMINATION OF SUBSTRATE /COATING INTERFACES

ΣΚΟΠΟΣ ΤΗΣ ΠΑΡΟΥΣΑΣ ΕΡΓΑΣΙΑΣ ΕΙΝΑΙ Η ΑΝΑΠΤΥΞΗ ΜΙΑΣ ΑΞΙΟΠΙΣΤΗΣ ΜΕΘΟΔΟΥ ΓΙΑ ΤΟΝΠΡΟΣΔΙΟΡΙΣΜΟ ΤΗΣ ΔΙΕΠΙΦΑΝΕΙΑΚΗΣ ΑΝΤΟΧΗΣ ΣΥΣΤΗΜΑΤΩΝ ΥΠΟΣΤΡΩΜΑΤΟΣ - ΕΠΙΚΑΛΥΨΗΣ.Η ΤΕΧΝΙΚΗ ΒΑΣΙΖΕΤΑΙ ΣΤΗ ΔΗΜΙΟΥΡΓΙΑ ΤΑΣΙΚΟΥ ΚΥΜΑΤΟΣ ΑΠΟ ΤΗΝ ΕΝΑΠΟΘΕΣΗ ΥΨΗΛΗΣ ΙΣΧΥΟΣ ΚΑΙ ΧΡΟΝΙΚΑ ΒΡΑΧΥΤΑΤΟΥ ΠΑΛΜΟΥ LASER, (ΔΙΑΡΚΕΙΑΣ 10 ^-11 - 10^-8 SEC), ΣΤΗΝ ΚΑΤΑΝΤΗ ΤΟΥ ΥΠΟ ΜΕΛΕΤΗ ΥΠΟΣΤΡΩΜΑΤΟΣ ΕΠΙΦΑΝΕΙΑ, Η ΟΠΟΙΑ ΕΙΝΑΙ ΕΠΙΚΑΛΥΜΜΕΝΗ ΜΕ ΛΕΠΤΟ ΣΤΡΩΜΑ ΥΛΙΚΟΥ ΜΕΓΑΛΗΣ ΙΚΑΝΟΤΗΤΑΣ ΑΠΟΡΡΟΦΗΣΗΣ ΗΛΕΚΤΡΟΜΑΓΝΗΤΙΚΗΣ ΑΚΤΙΝΟΒΟΛΙΑΣ. Η ΠΡΟΣΠΙΠΤΟΥΣΑ ΕΝΕΡΓΕΙΑ, ΜΕΤΑΤΡΕΠΕΤΑΙ ΣΕ ΘΕΡΜΙΚΗ ΕΝΕΡΓΕΙΑ ΚΑΙ ΟΔΗΓΕΙ ΣΤΗΝ ΕΚΡΗΚΤΙΚΗ ΕΞΑΕΡΩΣΗ ΤΟΥ ΑΠΟΡΡΟΦΗΤΙΚΟΥ ΥΛΙΚΟΥ, ΤΟ ΟΠΟΙΟ ΕΠΙΠΛΕΟΝ ΒΡΙΣΚΕΤΑΙ ΠΕΡΙΟΡΙΣΜΕΝΟ ΑΝΑΜΕΣΑ ΣΤΟ ΥΠΟΣΤΡΩΜΑ ΚΑΙ ΣΕ ΚΡΥΣΤΑΛΛΟ SIO2. Η ΕΚΡΗΚΤΙΚΗ ΕΞΑΕΡΩΣΗ ΠΡΟΚΑΛΕΙ ΤΑΣΙΚΟ ΘΛΙΠΤΙΚΟ ΚΥΜΑ ΤΟ ΟΠΟΙΟ ΔΙΑΔΙΔΕΤΑΙ ΔΙΑΜΕΣΟΥ ΤΟΥ ΣΥΣΤΗΜΑΤΟΣ ΥΠΟΣΤΡΩΜΑ /ΕΠΙΚΑΛΥΨΗ. Η ΑΝΑΚΛΑΣΗ ΤΟΥ ΤΕΛΕΥΤΑΙΟΥ ΣΤΗΝ ΕΛΕΥΘΕΡΗ ΕΠΙΦΑΝΕΙΑ ΤΗΣΕΠΙΚΑΛΥΨΗΣ ΕΧΕΙ ΩΣ ΕΠΑΚΟΛΟΥΘΟ ΤΗ ΔΗΜΙΟΥΡΓΙΑ ΕΦΕΛΚΥΣΤΙΚΟΥ ΤΑΣΙΚΟΥ ΚΥΜΑΤΟΣ ΤΟ ΟΠΟΙΟ ΔΥΝΑΤΑΙ ΝΑ ΠΡΟΚΑΛΕΣΕΙ ΑΠΟΚΟΛΛΗΣΗ ΤΗΣ ΕΠΙΚΑΛΥΨΗΣ ΕΑΝ Η ΑΝΑΠΤΥΣΣΟΜΕΝΗ ΤΑΣΗ ΣΤΗ ΔΙΕΠΙΦΑΝΕΙΑ ΞΕΠΕΡΑΣΕΙ ΤΗ ΔΙΕΠΙΦΑΝΕΙΚΗ ΑΝΤΟΧΗ. Η ΑΡΙΘΜΗΤΙΚΗ ΠΡΟΣΟΜΟΙΩΣΗ ΤΟΥ ΠΡΟΒΛΗΜΑΤΟΣ ΒΑΣΙΣΤΗΚΕ ΣΤΗΝ ΕΠΙΛΥΣΗ ΤΩΝ ΣΥΖΕΥΓΜΕΝΩΝ ΕΞΙΣΩΣΕΩΝ ΥΔΡΟΔΥΝΑΜΙΚΗΣ ΚΑΙ ΑΚΤΙΝΟΒΟΛΙΑΣ ΑΚΤΙΝΟΒΟΛΙΘΕΝΤΟΣ ΜΕΣΟΥ (ΔΙΑΤΗΡΗΣΗ ΜΑΖΑΣ, ΟΡΜΗΣ ΚΑΙ ΕΝΕΡΓΕΙΑΣ ΚΑΘΩΣ ΕΠΙΣΗΣ ΚΑΙ ΤΩΝ ΕΞΙΣΩΣΕΩΝ ΚΑΤΑΣΤΑΣΗΣ). ΤΟ ΠΡΟΚΥΠΤΟΝ ΑΡΙΘΜΗΤΙΚΟ ΣΧΗΜΑ,ΕΠΙΒΕΒΑΙΩΝΕΤΑΙ ΑΠΟ ΑΝΤΙΣΤΟΙΧΕΣ ΠΙΕΖΟΗΛΕΚΤΡΙΚΕΣ ΜΕΤΡΗΣΕΙΣ ΠΟΥ ΔΙΝΟΥΝ ΤΟ ΕΥΡΟΣΚΑΙ ΤΗΝ ΜΟΡΦΗ ΤΟΥ ΤΑΣΙΚΟΥ ΠΑΛΜΟΥ. ΤΟ ΣΗΜΑΝΤΙΚΟΤΕΡΟ ΠΛΕΟΝΕΚΤΗΜΑ ΤΗΣ ΠΡΟΤΕΙΝΟΜΕΝΗΣ ΜΕΘΟΔΟΥ ΣΥΝΙΣΤΑΤΑΙ ΣΤΟ ΓΕΓΟΝΟΣ ΟΤΙ Η ΕΠΙΚΑΛΥΨΗ ΑΠΟΚΟΛΛΑΤΑΙ ΑΠΟ ΤΟ ΥΠΟΣΤΡΩΜΑ ΧΩΡΙΣ ΠΡΟΓΕΝΕΣΤΕΡΗ ΔΙΑΤΑΡΑΧΗ ΤΗΣ (ΠΕΡΙΚΟΠΗ ΠΕΡΙΛΗΨΗΣ)THE PURPOSE OF THIS WORK IS TO DEVELOP A RELIABLE, QUANTITATIVE METHOD TO DETERMINE THE INTERFACIAL BOND STRENGTH OF SUBSTRATE/COATING INTERFACES. THE LASER INDUCED SPALLATION TECHNIQUE INVOLVES IMPINGING A HIGH - ENERGY LASER PULSE OF A NEW NANOSECONDS DURATION ON THE REAR SURFACE OF THE SUBSTRATE WHICH ISCOATED WITH A THIN FILM OF ABSORBING MATERIAL. THE INCIDENT LASER RADIATION IS CONVERTED RAPIDLY TO THERMAL ENERGY AND THE EXPLOSIVE EVAPORATION OF THE ABSORBING MATERIAL, SANDWICHED BETWEEN THE SUBSTRATE AND A FUSED QUARTZ CONFINING PLATE, SENDS A COMPRESSIVE SHOCK WAVE THROUGH THE SUBSTRATE TOWARD THE MATERIAL INTERFACE. THIS IN TURN IS REFLECTED FROM THE FREE SURFACE OF THE COATING GIVING RISE TO A TENSILE WAVE WHICH MAY LEAD TO SPALLATION AT THE INTERFACE. THE NUMERICAL SOLUTION OF THE PROBLEM IS BASED ON THE SIMULTANEOUS SOLUTION OF THE RADIATION HYDRODYNAMIC EQUATIONS OF AN IRRADIATED MEDIUM (CONSERVATION OF MASS, MOMENTUM AND ENERGY ALONG WITH THE EQUATIONS OF STATE (EOS)). THE DEVELOPED MODEL IS FINE TURNED AND CALIBRATED AGAINST DIRECT MEASUREMENTS OF THE GENERATED STRESS PULSE BASED ON A PIEZOELECTRIC DEVICE. THE MAIN ADVANTAGE OF THE LASER SPALLATION TECHNIQUE IS THAT THE FILM IS DETACHED FROM THE SUBSTRATE WITHOUT ANY PRIOR DISTURBANCE OF THE FILM SURFACE. IT IS THE ONLY KNOWN WAY TO MEASURE BASIC ADHESION IF THE ADHERATE IS NOT IN LIQUID FORM

Patent hemostasis of radial artery: Comparison of two methods

BACKGROUND Radial artery obstruction is the most common complication of coronary angiography performed via transradial access. Patent hemostasis can significantly reduce the risk of radial artery occlusion. Previous studies utilized sophisticated methods to evaluate radial artery patency. Simplified and easily applicable methods for successful patent hemostasis are currently lacking. AIM To determine which method (pulse oximeter vs the traditional radial artery palpation) is better to achieve patent hemostasis. METHODS This prospective, single center study included 299 consecutive patients who underwent coronary angiography or percutaneous coronary intervention between November 2017 and July 2019. Patients less than 18 years old, with a history of radial artery disease, or no palpable artery pulse were excluded from the study. Patients were randomly assigned to two groups. In the first group, radial artery flow was assessed by palpation of the artery during hemostasis (traditional method). In the second group, radial artery patency was estimated with the use of a pulse oximeter. Two different compression devices were used for hemostasis (air chamber and pressure valve). The primary study endpoint was the achievement of successful patent hemostasis. RESULTS The two groups (pulse oximeter vs artery palpation) had no significant differences in age, sex, body mass index, risk factors, or comorbidities except for supraventricular arrhythmias. The percentage of patients with successful patent hemostasis was significantly higher in the pulse oximeter group (82.2% vs 68.1%, P = 0.005). A lower percentage of patients with spasm was recorded in the pulse oximeter group (9.9% vs 19.0%, P = 0.024). The incidence of local complications, edema, bleeding, hematoma, vagotonia, or pain did not differ between the two groups. In the multivariate analysis, the use of a pulse oximeter (OR: 2.35, 95%CI: 1.34-4.13, P = 0.003) and advanced age (OR: 1.04, 95%CI: 1.01-1.07, P = 0.006), were independently associated with an increased probability of successful patent hemostasis. The type of hemostatic device did not affect patent hemostasis (P = 0.450). CONCLUSION Patent hemostasis with the use of pulse oximeter is a simple, efficient, and safe method that is worthy of further investigation. Larger randomized studies are required to consider its clinical implications