10 research outputs found
Unevenness of air-jet spun yarn comparison with ring and rotor spun yarn made from micro modal fibers
UsporeÄeni su parametri nejednolikosti (ukupna nejednolikost, nejednolikosti na razliÄitim mjernim dužinama 1, 3 i 10 m dužine mjerenja dlakavosti aerodinamiÄke predene preÄe iz mikro modalnih vlakana ispredene na aerodinamiÄkoj predilici J20 s parametrima nejednolikosti rotorske i konvencionalne prstenaste predene preÄe iz istih vlakana. Kako bi se smanjio broj ulaznih utjecajnih parametara na parametre nejednolikosti, usporeÄivanje je izvrÅ”eno na preÄama jednakih namjena (pletenje) te jednakih finoÄa od 20 tex (Nm 50). Pod pretpostavkom da distibucija mase u preÄama slijedi normalnu (Gausovu) krivulju proveden je t-test za nejednolikost preÄa. Pokazalo se da je ukupna nejednolikost aerodinamiÄke preÄe manja od nejednolikosti rotorske, a veÄa od nejednolikosti konvencionalne prstenaste preÄe, dok je na veÄim mjernim duljinama (1 m, 3 m i 10 m) manja od obiju preÄa, rotorske i prstenaste preÄe. Broj tankih mjesta aerodinamiÄke preÄe na osjetljivosti mjerenja -30 % je veÄi od broja ovih graÅ”aka na prstenastoj preÄi za 9,2 puta, dok u odnosu na rotorsku preÄu manji je za 4,2 %. AerodinamiÄka preÄa na razini osjetljivosti +50 % ima najmanji broj debelih mjesta. U pogledu dlakavosti, aerodinamiÄka preÄa je razmjerno bolje kvalitete.All unevenness parameters (overall unevenness, unevenness on different cut lengths of 1 m, 3 m and 10 m and hairiness) of the air-jet yarn produced from micro modal fibers spun on the J20 air jet machine using the unevenness parameters of the rotor spun and conventional ring spun yarn produced form the same fibers were compared. In order to reduce the number of input influencing parameters on the unevenness properties, the comparison was performed on yarns for the same end-use (knitting) and with an equal count of 20 tex (Nm 50). Assuming that the mass distribution in the yarns follows a normal (Gauss) curve a t-test of yarn unevenness was carried out. It was shown that the overall unevenness of the air-jet-spun yarn is smaller than that of the rotor spun yarn and is greater than the unevenness of the conventional ring spun yarn, while over larger cut lengths (1 m, 3 m and 10 m) it is smaller than in both yarns, rotor and ring spun yarns. The number of thin places in air-jet-spun yarns at a sensitivity level -30% is higher than the number of these faults in the ring spun yarn by 9.2 times and compared with the rotor spun yarn lower by 4.2%. The air-jet-spun yarn at a sensitivity level +50 % has the smallest number of thick places. In terms of hairiness, the air-jet-spun yarn has a relatively higher quality
Study on Physical-mechanical Parameters of Ring-, Rotor- and Air-jet-spun Modal and Micro Modal Yarns
The main physical-mechanical parameters of modal yarns (unevenness, faults, hairiness and spectrograms) were compared with the parameters of micro modal yarns of the same fineness and end-use. The difference in tenacity and elongation at break of different types of modal and micro modal-spun yarns is determined by yarn structure. The highest tenacity was achieved in the oriented structure of ring-spun yarn, followed by air-jet-spun and rotor-spun yarn, in the case of both modal and micro modal fibres. All types of modal yarns differ in overall unevenness and in terms of micro modal fibres. The values of the overall unevenness of ring-, rotor- and air-jet-spun modal yarns are greater than or equal to the same values of micro modal yarns. The spinning technique, and thus the yarn structure, determine the level of overall yarn evenness. The number of faults at different levels of sensitivity measurement to detect the highest number of thin and thick places and neps (ā30%, +35% and +140%) is greater in rotor- and air-jet-spun yarn than in ring-spun yarn for both levels of fibre fineness. Periodic faults of short wavelengths with significant amplitude increase the number of yarn faults to a certain extent. Rotor-spun micro modal yarn shows the highest deviation from ideal unevenness, while ring-spun modal yarn shows the lowest deviation. Yarn hairiness depends on
the spinning technique. Finer fibres cause lower hairiness in all yarn types
Carotid Cavernous Fistulas in Postmenopausal Women
U razdoblju od posljednjih pet godina na Klinici za oÄne bolesti KliniÄke bolnice "Sestre milosrdnice" osam bolesnica je hospitalizirano radi obrade i terapije kavernozne karotidne fistule. Cilj ove studije bio je prikazati naÅ”a iskustva u dijagnostici, terapiji i praÄenju bolesnika s kavernoznim karotidnim fistulama. Svi pacijenti bile su žene u menopauzi srednje životne dobi 69,75Ā±7,3 godina, bez ikakve traume u anamnezi. NajÄeÅ”Äi simptomi bili su proptoza, pad vida i kemoza. Od dijagnostiÄkih metoda rabili smo ultrazvuk, magnetsku rezonanciju (NMR) i angiografiju. Endovaskularna balonska okluzija bila je terapija izbora kod svih bolesnica, ali je kod jedne doÅ”lo do spontanog zatvaranja fistule, dok je jedna odbila takvu vrstu lijeÄenja. Na prvom pregledu, mjesec dana nakon terapije, doÅ”lo je do poboljÅ”anja oÄnog statusa. Simptomi kao bol, Å”um, kemoza, pulsacije bulbusa, glavobolje i dvoslike nisu bili prisutni. ZamijeÄen je mnogo manji periorbitalni edem, proptoza i dilatacija retinalnih vena, te niže vrijednosti intraokularnog tlaka. Razdoblje praÄenja bilo je Å”est mjeseci i nije zamijeÄena ponovna pojava fistule. Takve spontane fistule opisane u ovoj studiji su duralni Å”antovi s predilekcijom u postmenopauzalnih žena, najvjerojatnije zbog ateroskleroze, hipertenzije i promjena u zgruÅ”avanju krvi povezanih s hormonskim statusom.During the last five-year period, eight patients were hospitalized at University Department of Ophthalmology, Sestre milosrdnice University Hospital, for elaboration and therapy of spontaneous indirect carotid cavernous fistulas. The aim of this report is to present our experiences in the diagnosis, treatment and follow up of patients with carotid cavernous fistulas. All patients were postmenopausal women, mean age 69.75Ā±7.3 years, without any trauma in their history. The most common symptoms were proptosis, low vision and chemosis. Ultrasound, computerized tomography, magnetic resonance imaging and angiography were used as diagnostic methods. Endovascular balloon occlusion was the treatment of choice in all patients except for one with spontaneous closure of the fistula, whereas another one refused this mode of treatment. The first follow up examination at one month after therapy showed improvement of ocular status. There was no pain, bruit, chemosis, pulsations of the globe, headache or double vision, while periorbital edema, proptosis, dilatation of retinal veins and intraocular pressure were reduced. During the six-month follow up period, no recurrence was recorded. Spontaneous fistulas described in this study tend to be dural shunts. These shunts have a predilection to develop in postmenopausal women, possibly due to atherosclerosis, hypertension and alterations in blood coagulation associated with hormonal changes
Opportunistic screening for colorectal cancer in high-risk patients in family medicine practices in the Republic of Croatia
Colorectal cancer is a malignant neoplasm which has an increasing incidence and
represents a global public health problem. The majority of patients are diagnosed after the age of 50,
and the risk of developing it over lifetime is 5%. Development of preventive, diagnostic and treatment
methods has resulted in a significant reduction in mortality and other negative clinical outcomes.
Precisely because of the efficient method of prevention and early detection of this disease, numerous
countries, including Croatia, have organized national colorectal cancer screening and monitoring programs.
However, these programs are primarily organized for the population with the usual, i.e. average
risk of developing colorectal cancer. High-risk groups include persons with endoscopically detected
and removed colon polyps, persons surgically treated for colon cancer, persons with a positive family
history of colorectal cancer, persons with inflammatory bowel diseases, individuals and families with
hereditary disorders or genetic mutations that increase the risk of this disease several fold, persons
with acromegaly, and patients who have undergone ureterosigmoidostomy. Recommendations for the
detection and monitoring of high-risk groups are often not defined clearly, and some of the existing
ones are based mostly on scarce scientific evidence. It is commonly accepted that screening in high-risk
groups should start at an earlier age, with shorter intervals between follow-ups. The basic diagnostic
method for screening and monitoring in these patient groups is endoscopic monitoring, or colonoscopy.
The aim of this review paper is to present the characteristics of the abovementioned risk
groups and provide clear screening recommendations
Sigurnost i uÄinkovit ostfiksne kombinacije (travoprost 0,004%/timolol 0,5%) umjesto monoterapije u Å”estomjeseÄnom periodu praÄenja
Purpose: To assess the safety and efficacy of changing antiglaucoma therapy to the travoprost 0,004%/timolol 0,5% (TTF C) fixed combination from previous monotherapies.
Methods: Prospective, open-label, observational, multicenter cohort. A change was done from prior monotherapy at day 0 to TTF C dosed once a day, regardless in the evening or in the morning, without washout period. Active evaluation of systemic and local tolerability (adverse events), and efficacy ie. intraocular pressure (IOP) lowering was done at control 1 (day 30), control 2 (day 90) and control 3 (day 120).
Results: 40/155/170 patients (79/309/339 eyes) completed the study (120 days/ 90 days/baseline, respectfully). At control 1 excluded were patients with low tolerability (severe hyperemia (6 patients), discomfort (4), chest pain (1)) and non responders (IOP lowering less than 15% from baseline IOP or target IOP >18 mmHg (4 patients)). Mean IOP at control 1 was 15,92Ā±1,85 mm Hg (21,66% reduction) for 155 patients (non responders excluded), at control 2 was for 155 patients 15,67Ā±2,17 mm Hg (21,14% reduction), and at control 3 for 40 patients 16,28Ā±1,59 mm Hg (19,86% reduction). At control 2 analysis of IOP reduction by 4 groups of previous monotherapy (timolol 0,5% (N=33/66), latanoprost 0,005% (N=49/98), betaxolol 0,5% (N=30/60), and travoprost 0,004% (N=43/85) was performed. 40 patients/79 eyes endured to control 3 (after day 90 free samples were not available for all patients). Analysis of IOP reduction by 4 groups of previous monotherapy medications was performed (timolol 0,5%(N=7/14), latanoprost 0,005% (N=14/28), betaxolol 0,5% (N=7/14), travoprost 0,004% (N=12/23)).
Conclusions: Changing patients from prior monotherapy to TTF C can provide on average a further reduction in IOP, while demonstrating a favorable safety profile.CILJ: Zabilježiti sigurnost i uÄinkovitost promjene antiglaukomske terapije u travoprost 0,004%/timolol 0,5% (TTF C) fiksnu kombinaciju s prethodnih monoterapija.
METODE: Prospektivna, otvorena, opservacijska, multicentriÄna populacija. Promjena s prethodne monoterapije na dan 0 u TTF C, doziran jednom dnevno, ili ujutro ili naveÄer, bez perioda ispiranja. Aktivno je ocijenjena sistemska i lokalna podnoÅ”ljivost (popratne pojave), i uÄinkovitost tj.sniženje intraokularnog tlaka (IOT) na prvoj kontroli (dan 30), drugoj kontroli (dan 90) i treÄoj kontroli (dan 120).
REZULTATI: 40/155/170 bolesnika (79/309/339 oÄiju) zavrÅ”ilo je studiju (120 dana/ 90 dana/poÄetak). Na prvoj kontroli iskljuÄeni su svi bolesnici koji su slabo podnosili lijek: ozbiljna hiperemija (6 bolesnika), neugoda (4), bol u prsiÅ”tu (1) i ne- responderi tj. sniženje IOT-a manje od 15% od poÄetnog IOT ili ciljnog IOT >18 mmHg (4 bolesnika). ProsjeÄni IOT na prvoj kontroli je bio 15,92Ā±1,85 mm Hg (21,66% sniženja) kod 155 bolesnika (iskljuÄeni ne-responderi), na drugoj kontroli je kod 155 bolesnika bio 15,67Ā±2,17 mm Hg (21,14% sniženja), i na treÄoj kontroli kod 40 bolesnika 16,28Ā±1,59 mm Hg (19,86% sniženja). Na drugoj kontroli je uÄinjena analiza sniženja IOT-a u 4 grupe prethodno koriÅ”tene monoterapije: timolol 0,5% (N=33/66), latanoprost 0,005% (N=49/98), betaxolol 0,5% (N=30/60), i travoprost 0,004% (N=43/85). 40 bolesnika/79 oÄiju praÄeno je do treÄe kontrole. UÄinjena je analiza sniženja IOT-a u 4 grupe prethodno koriÅ”tene monoterapije: timolol 0,5% (N=7/14), latanoprost 0,005% (N=14/28), betaxolol 0,5% (N=7/14), travoprost 0,004% (N=12/23).
ZakljuÄak: Promjena terapije s prethodne monoterapije u TTF C može u prosjeku omoguÄiti dodatno sniženje IOT-a, uz zadovoljavajuÄi profil sigurnosti
Comparison of Visual Evoked Potentials, Automated Perimetry and Frequency-Doubling Perimetry in Early Detection of Glaucomatous Visual Field Loss
The present study compares frequency-doubling perimetry (FDP), automated perimetry (AP) and visual evoked potentials
(VEP) for their ability to diagnose early glaucoma. In present study 224 patients of Clinic for Eye Diseases,
Clinical Hospital Ā»Sestre MilosrdniceĀ« that had diagnosis of open angle glaucoma and glaucomatous visual field loss
proven by automated static perimetry on only one eye were performing all three tests. Visual evoked potentials, automated
perimetry and frequency-doubling perimetry were performed four times in each patient with six months period
in between testing. Significant difference was proven between frequency-doubling perimetry and automated perimetry
in favor for FDP in early detection of glaucomatous field loss. There was no significant difference between FDP and
VEP neither between VEP and AP measurements. The results of this study indicate that frequency-doubling perimetry
is significantly better method for early detection of glaucomatous visual field loss than automated static perimetry
Comparison of Visual Evoked Potentials, Automated Perimetry and Frequency-Doubling Perimetry in Early Detection of Glaucomatous Visual Field Loss
The present study compares frequency-doubling perimetry (FDP), automated perimetry (AP) and visual evoked potentials
(VEP) for their ability to diagnose early glaucoma. In present study 224 patients of Clinic for Eye Diseases,
Clinical Hospital Ā»Sestre MilosrdniceĀ« that had diagnosis of open angle glaucoma and glaucomatous visual field loss
proven by automated static perimetry on only one eye were performing all three tests. Visual evoked potentials, automated
perimetry and frequency-doubling perimetry were performed four times in each patient with six months period
in between testing. Significant difference was proven between frequency-doubling perimetry and automated perimetry
in favor for FDP in early detection of glaucomatous field loss. There was no significant difference between FDP and
VEP neither between VEP and AP measurements. The results of this study indicate that frequency-doubling perimetry
is significantly better method for early detection of glaucomatous visual field loss than automated static perimetry
OportunistiÄki probir raka debelog i zavrÅ”nog crijeva u visokoriziÄnih bolesnika u ordinacijama obiteljske medicine u Republici Hrvatskoj
Kolorektalni karcinom zloÄudna je novotvorina incidencija kojega je u stalnom porastu
i koja predstavlja globalni javnozdravstveni problem. U veÄine bolesnika ova se bolest dijagnosticira
nakon 50. godine života, a rizik od njenog razvoja tijekom životnog vijeka iznosi oko 5%. Razvoj
preventivnih, dijagnostiÄkih i terapijskih metoda rezultirao je znaÄajnim smanjenjem smrtnosti i drugih
negativnih kliniÄkih ishoda. Upravo zbog uÄinkovite metode prevencije i ranog otkrivanja ove
bolesti u brojnim državama pa tako i u Republici Hrvatskoj organizirani su nacionalni programi probira
i praÄenja kolorektalnog karcinoma. MeÄutim, navedeni su programi prvenstveno organizirani za
populaciju s uobiÄajenim, odnosno prosjeÄnim rizikom obolijevanja od kolorektalnog karcinoma.
VisokoriziÄne skupine obuhvaÄaju osobe u kojih su endoskopski otkriveni, odnosno uklonjeni polipi
debelog crijeva, osobe kirurÅ”ki lijeÄene zbog karcinoma debelog crijeva, osobe s pozitivnom obiteljskom
anamnezom za kolorektalni karcinom, osobe oboljele od upalnih bolesti crijeva, pojedinci i
obitelji s nasljednim poremeÄajima, odnosno genetskim mutacijama koje viÅ”estruko poveÄavaju rizik
za razvoj ove bolesti, osobe oboljele od akromegalije te bolesnici u kojih je uÄinjen zahvat ureterosigmoidostomije.
Preporuke za otkrivanje i praÄenje visokoriziÄnih skupina Äesto nisu jasno definirane, a
neke od postojeÄih se temelje na uglavnom oskudnim znanstvenim dokazima. OpÄe je prihvaÄeno
miÅ”ljenje da bi probir u visokoriziÄnih skupina trebao zapoÄeti u ranijoj životnoj dobi uz kraÄe vremenske
intervale izmeÄu pojedinih pregleda. Osnovna dijagnostiÄka metoda probira i praÄenja u ovih
skupina bolesnika je endoskopsko praÄenje, odnosno kolonoskopija. Cilj ovoga preglednog rada je
prikazati znaÄajke navedenih riziÄnih skupina i dati jasne preporuke za probir