Comparison of multidetector-row computed tomography and duplex Doppler ultrasonography in detecting atherosclerotic carotid plaques complicated with intraplaque hemorrhage [Usporedba višeslojne kompjuterizirane tomografije i duplex Doppler ultrazvuka u otkrivanju aterosklerotskih karotidnih plakova kompliciranih krvarenjem u plak ]

This study compared sensitivity and specificity of multidetector-row computed tomography and duplex Doppler ultrasonography in detecting atherosclerotic carotid plaques complicated with intraplaque hemorrhage. Carotid plaques from 50 patients operated for carotid artery stenosis were analyzed. Carotid endarterectomy was performed within one week of diagnostic evaluation. Results of multidetector-row computed tomography and duplex Doppler ultrasonography diagnostic evaluation were compared with results of histological analysis of the same plaque areas. American Heart Association classification of atherosclerotic plaques was applied for histological classification. Median tissue density of carotid plaques complicated with intraplaque hemorrhage was 14.7 Hounsfield units. Median tissue density of noncalcified segments of uncomplicated plaques was 54.3 Hounsfield units (p = 0.00003). The highest tissue density observed for complicated plaques was 31.8 Hounsfield units. Multidetector-row computed tomography detected plaques complicated with hemorrhage with sensitivity of 100% and specificity of 70.4%, with tissue density of 33.8 Hounsfield units as a threshold value. Duplex Doppler ultrasonography plaque analysis based on visual in-line classification showed sensitivity of 21.7% and specificity of 89.6% in detecting plaques complicated with intraplaque hemorrhage. Multidetector-row computed tomography showed a very high level of sensitivity and a moderate level of specificity in detecting atherosclerotic carotid plaques complicated with hemorrhage. Duplex Doppler ultrasonography plaque analysis based on visual in-line classification showed a low level of sensitivity and a moderate-high level of specificity in detecting atherosclerotic carotid plaques complicated with hemorrhage

Dissecting lesions of common carotid artery after carotid surgery: a case report

This case report represents rare complication of carotid surgery, iatrogenic dissection of the common carotid artery and its successful endovascular treatment. We herein report a case of 55 year-old female patient in whom carotid surgery was performed due to constant tinnitus caused by kinking of right internal carotid artery. On day 7th carotid control ultrasound was performed, according to hospital’s protocol. The carotid ultrasound showed dissecting lesion of right common carotid artery in a length of three centimeters that was confirmed with computed tomography angiography of neck vessels, and dual antithrombotic therapy was initiated. One month later percutaneous angioplasty was performed with stent implantation

RELIABILITY ANALYSIS OF DIFFERENT RCIED ACTIVATION SIGNAL RESPONSIVE JAMMING TECHNIQUES AND THEIR COMPARISON TO ACTIVE JAMMING

In this paper we compared the time required for the successful jamming of remote controlled improvised explosive devices activation using active and responsive jamming methods. As a representative of active jamming method we analyzed jamming signal generation using frequency sweep. For the analysis of the possible activating signal presence based on responsive jamming procedures we first supposed Fast Fourier Transform (FFT) implementation and compared its analysis rate to the rate of sweep jamming. Taking into account the current technology state, it is proved that the time required to achieve the successful jamming relied on FFT analysis may be less than in the case of active sweep jamming. After that we considered pros and cons for energy detector and matched filter detector implementation in responsive jamming. For these two detector types it is shown how to determine the number of analysis blocks to achieve approximately the same number of collected samples as in the case of FFT implementation, starting from the probabilities of false detection and miss of detection

A patient with three aortoenteric fistulas in a period of five years: case report

Background: Aortoenteric fistula (AEF) is a pathological communication between the aorta and gastrointestinal tract that presents a life-threatening condition. It can be primary or secondary, based on the underlying cause of fistula development. Case study: We present a 67-year-old female patient who suffered from three secondary AEFs in a period of five years. After two abdominal surgeries for gastric ulcer and colorectal adenocarcinoma (TNM stage II), the patient had an open abdominal aortic aneurysm reconstruction. For each AEF presentation, opened surgical reconstruction was performed. Conclusion: Morbidity and mortality rates after AEF surgery are high despite advances in surgical techniques and materials. Three times recurrent AEF in a single patient with 5-years survival after initial reconstructive surgery is rare event

Legionella Pneumophilia on board ship’s freshwater systems and technological and organizational measures of prevention and suppression

Contamination of freshwater piping on board ships could result in severe health problems, and hence, in lost of operating hours and profit. The paper aims at presenting the main reasons for the growth of bacteria and other parasites. Furthermore, technological and organizational measures for the prevention and suppression of legionella are pointed out

A Rare Case of Multiple Aneurysms in a Young Patient

Multiple aneurysms are clinically common in population aged over sixty and are caused mainly by atherosclerosis. When occurring in young population other etiologies such as trauma, infections, Bechet’s disease, Marfan syndrome, neurofibromatosis or inflammatory disease are responsible for the development of arterial aneurysms. A rare case of multiple aneurysms in a 40-year-old man, affecting the infrarenal part of abdominal aorta, both iliac arteries, common femoral arteries, left femoral superficial and popliteal arteries on both legs, is reported. The underlying pathology was progressive atherosclerosis, favored by familial hyperlipidemia and excessive cigarette smoking

York-Antwerp Rules, 1994 (and) 2004 = York-antwerpenska pravila iz 1994. (i) 2004. : [translations, parallel texts]

Daju se usporedni tekstovi engleskih izvornika i hrvatskih prijevoda Pravila iz 2004., uspoređen s prijevodima Pravila iz 1994.Parallel publishing of English texts and translation in Croatian of Rules (1994 and 2004)

Successful Sweep Jamming Rate Determination of MPSK Modulated RCIED Activation Message Signals

This paper presents the development of the method for accurate successful jamming rate calculation when MPSK modulated RCIED activation message is jammed using sweep signal. Opposite to classical methods of error modelling where it is taken that only one bit in a symbol may be altered, it is supposed in this paper that any number of bits in a symbol is the subject of eventual modification. The derived formulas are achieved for QPSK, 8PSK and 16PSK modulated signals jamming. The results calculated by these formulas are verified and obtained by our originally developed simulation method. The results of calculation and simulation agree very well and the maximum difference between calculated and simulated successful jamming rate for any of three analyzed jamming methods and any level ratio between activation message signal and jamming signal does not overcome 1.1%. It is proved that successful jamming rate tends to maximum value 0.5 when jamming signal power increases and that only 20% lower successful jamming rate value is obtained for less than 7dB higher jamming signal level than it is the level of RCIED activation signal. These results point out that it is not necessary to apply too high emission power to achieve acceptable jamming effect. As a consequence, jammer practical implementation is easier and its dimensions are smaller