8 research outputs found
Impact of pulsating infrared and red monochromatic light treatment on wound healing in horses.
Low Level Light Therapy (LLLT) is a treatment method where red light or near infrared (NIR) light is utilised for treating a variety of disorders including wounds. Wound healing in horses may be slow, especially on the distal limb, and there is an interest to shorten healing times. The purpose of the present study was to investigate how treatment with pulsating visible red light (λâ637 nm) and NIR light (λâ956 nm) affects wound healing time in healthy horses.
A circular skin wound (Ă=2 cm) was created on each side of the neck in healthy horses (n=8). One of the wounds was treated using light treatment and the other was left untreated, serving as negative control. Treatment duration was 4 minutes and 40 seconds (red light 95 seconds, NIR light 185 seconds) and was performed once daily day 0-4, 7-11, 14-18 and 21-25. The irradiance was measured to 2.3 mW/cm2 for red light and 6.4 mW/cm2 for NIR light.
The wounds were photographed and evaluated using digital planimetry day 0, 1, 2, 3, 4, 7, 14, 21, 28 and 35. The wound area did not differ between treated and control group on any day. The wounds where visually inspected daily and the time to complete healing was recorded. Control wounds were judged as completely healed after a mean time of 49,0 days (95%Ci=35,462,6) and treated wounds after 51,8 days (95%Ci=38,7-64,8). This is a significantly shorter time to complete healing for control wounds (p=0,026). The evaluators were blinded in respect to which wound was treated.
The results of this study do not indicate any positive effect of light treatment on healing of experimental skin wounds in horses.Low Level Light Therapy (LLLT) Ă€r en behandlingsmetod dĂ€r rött ljus eller ljus i den nĂ€ra infraröda (NIR) delen av spektrumet anvĂ€nds, bland annat i syfte att förkorta sĂ„rlĂ€kningstider. SĂ„rlĂ€kning pĂ„ hĂ€st kan ta lĂ„ng tid, sĂ€rskilt pĂ„ benens distala delar och ett intresse finns för metoder som kan förkorta lĂ€kningstiden. Syftet med denna studie Ă€r att undersöka om behandling med pulserande rött synligt ljus (λâ637 nm) och NIR ljus (λâ956 nm) pĂ„verkar sĂ„rlĂ€kningshastigheten hos friska hĂ€star.
Ett cirkulĂ€rt sĂ„r (Ă=2 cm) stansades ut pĂ„ vardera sida av halsen hos friska hĂ€star (n=8). Den ena sidans sĂ„r ljusbehandlades och den andra sidan lĂ€mnades som negativ kontroll. Behandlingen varade i 4 minuter och 40 sekunder (rött ljus 95 sekunder, NIR ljus 185 sekunder) och utfördes en gĂ„ng dagligen dag 0-4, 7-11, 14-18 och 21-25. Irradiansen för rött ljus mĂ€ttes till 2,3 mW/cm2 och för NIR ljus till 6,4 mW/cm2.
SÄren fotograferades och utvÀrderades med digital planimetri dag 0, 1, 2, 3, 4, 7, 14, 21, 28 och 35. SÄrarean skiljde inte mellan behandlings- och kontrollgrupp nÄgon av dagarna. SÄren inspekterades visuellt dagligen och tiden till fullstÀndig lÀkning noterades. KontrollsÄren bedömdes fullstÀndigt lÀkta efter i genomsnitt 49,0 dagar (95%Ci=35,4-62,6) och behandlade sÄr efter 51,8 dagar (95%Ci=38,7-64,8). Tiden till fullstÀndig lÀkning var signifikant kortare för kontrollsÄren (p=0,026). Personerna som utvÀrderade sÄrlÀkningen var blindade för vilka sÄr som var behandlade.
Ljusbehandling hade ingen pÄskyndande effekt pÄ lÀkning av experimentellt framkallade sÄr hos hÀst i denna studie
Upper respiratory disease caused by feline herpesvirus type 1 and feline calicivirus : laboratory diagnostics, epidemiology and immunoprophylaxis
De vanligaste orsakerna till kattsnuva Àr infektion med felint herpesvirus typ 1 (FHV-1) eller felint calicivirus (FCV). BÄda virusen Àr vanligt förekommande Àven i den friska populationen och prevalensen Àr generellt högre i större djurgrupper. Efter infektion med FHV-1 lÀgger sig viruset ofta latent och kan Äteraktiveras av olika stressfaktorer. FCV kan utsöndras i flera Är efter infektion och detta utan att katterna visar kliniska symtom.
Smittspridning för FHV-1 sker frÀmst via direktkontakt med akut sjuka djur eller intermittent utsöndrande djur. FCV smittar direkt frÄn sjuka djur eller friska smittbÀrare men kan ocksÄ smitta via ytor. I tÀta kattpopulationer Àr troligen smittspridning via ytor en viktig smittvÀg Àven för FHV-1.
Polymeraskedjereaktion (PCR) och virusisolering (VI) anvÀnds idag för att detektera virus frÄn infekterade katter. En bra PCR kan upptÀcka fÀrre viruspartiklar Àn VI och Àr sÄledes bÄde kÀnsligare och snabbare. Eftersom det Àr vanligt med friska smittbÀrare betyder positivt
testsvar inte sĂ€kert att viruset Ă€r sjukdomsorsakande hos individen. Serologi har inte visat sig anvĂ€ndbart vid sjukdomsdiagnostisering, men höga antikroppstitrar kan tyda pĂ„ att individen Ă€r skyddad frĂ„n sjukdom. En korrelation mellan halten virusneutraliserande antikroppar (VNA) och skydd vid âchallengeâ förekommer, men Ă€r inte fullstĂ€ndig. Individer utan VNA kan ocksĂ„ vara skyddade, vilket tyder pĂ„ att cell-medierad immunitet ocksĂ„ Ă€r viktig.
Prevalensstudier i Europa visar siffror för FHV-1 i friska populationer sÄ lÄga som 0 % och sÄ höga som 11 %. För FCV Àr motsvarande siffror mellan 2,6 % och 29 % i den friska
populationen. Den stora skillnaden beror troligen pÄ hur studiepopulationen valts men ocksÄ pÄ flera faktorer sÄ som hur provet Àr taget och val av analysmetod.
Vaccinering ger inget fullstÀndigt skydd mot infektion och sjukdom men ger skydd genom en lindrigare symtombild vid infektion. Vaccinering ger ocksÄ en minskad virusutsöndring, men prevalensstudier tyder pÄ att den Àr otillrÀcklig för begrÀnsning av smittspridning. FCV
muterar ofta och antigeniciteten skiljer mycket mellan olika stammar, men alla anses tillhöra samma serotyp. Skillnaden i antigenicitet fÄr till följd att olika immunitet bildas beroende pÄ stam. Immunitet mot en stam ger bra skydd mot andra stammar om korsreaktiviteten mellan stammarna Àr hög. Val av vaccinstam kan sÄledes vara av betydelse för att skapa en sÄ bra immunitet som möjligt mot fÀltstammar. Nya studier tyder pÄ att bredare korsneutraliserande förmÄga och bÀttre skydd kan fÄs genom att kombinera flera stammar i samma vaccin.
Syftet med denna litteraturstudie Àr att undersöka vilka laboratoriediagnostiska metoder som finns tillgÀngliga för att undersöka förekomst av sjukdom och sjukdomens epidemiologi samt belysa vÀrdet av immunprofylax.The most common cause of upper respiratory disease in cats is infection with feline herpesvirus type 1 (FHV-1) or feline calicivirus (FCV). Both viruses are commonly found in
the healthy cat population and the prevalence is usually higher in larger cat groups. Following FHV-1-infection the virus often becomes latent and may be reactivated by stress. FCV may be shed for several years post infection without the presence of clinical signs. Transmission of
FHV-1 mainly occurs by direct contact with acutely ill animals or latently infected cats undergoing reactivation. FCV spreads mainly directly from sick cats or carriers, but may also spread via contaminated environment. Environmental contamination with FHV-1 is probably an important way of transmission in dense cat populations.
Polymerase chain reaction (PCR) and virus isolation (VI) are used for detecting virus in infected cats. A good PCR has the ability to detect smaller amounts of virions and is hence both more sensitive and faster. Since it is common with healthy cats shedding virus, a positive test does not automatically mean that the agent is disease-causing. Serology has not been found useful for diagnosing disease, but antibody level indicates if the cat is protected from disease or not. A correlation between virus-neutralizing antibodies (VNA) and protection against challenge infection exists but cats without VNA may also be protected,
indicating that cell-mediated immunity is an important factor.
Prevalence studies in Europe show a prevalence of FHV-1 in the healthy cat population between 0 % and 11 %. Corresponding figures for FCV are 2,6 % to 29 %. The substantial differences in results are probably due to how the study population is chosen but also to factors such as sampling technique and the method used for analysis.
Vaccination does not provide full protection against infection or disease but lessens the severity of clinical symptoms. Even though viral shedding is lower in vaccinated cats, prevalence studies indicate that this does not prevent transmission. FCV mutates quickly and the antigenicity differs between different strains, but all strains are considered to belong to the same serotype. The diverse antigenicity results in different immunity to the various strains.
Immunity to one strain offers protection to other strains corresponding to the degree of antigenic similarity. The selection of vaccine strain may therefore be of importance to create the best possible immunity to field strains. Recent studies indicate that combining various strains in vaccines can attain a broader cross-protecting ability.
The purpose of this literature review is to investigate which laboratory methods that are available for diagnosing disease and for investigating the epidemiology of the disease. In addition the value of immunoprophylaxis will be highlighted
Nitrofurantoin plasma- and urine exposure in eight healthy beagle dogs following standard nitrofurantoin dosing regimen
Bacterial cystitis is common in dogs and is usually treated with antibiotics. Nitrofurantoin is used for treatment of bacterial cystitis in humans and might provide a feasible treatment option in dogs. The aim of this study was to investigate the nitrofurantoin plasma concentration-time course and potential adverse effects in dogs. Nitro-furantoin (4.4-5.0 mg/kg) was administered orally to eight healthy beagles every 8 h for five days before repeated plasma and urine samples were collected. An additional four beagles served as untreated controls. The nitrofurantoin plasma and urine concentrations were measured using ultra high precision liquid chromatography coupled to tandem mass-spectrometry and further analysed using a non-compartmental pharmacokinetic model. In plasma, the median C-max was 2.1 mu g/mL, t(max) was 2 h, the terminal rate constant was 0.9 per h and the terminal half-life was 0.8 h. In urine, median C-max was 56 mu g/mL, t(max) was 1 h and the terminal half-life was 4.3 h. No adverse effects were observed clinically or in haematology or biochemistry. The data presented in this study combined with in vitro sensitivity data from common urine pathogens and the lack of observed adverse effects suggest that nitrofurantoin in a standard dosing regimen could be effective in sporadic bacterial cystitis treatment in dogs. Further clinical studies are highly warranted to verify the effectiveness in clinical cases
Plasma atropine concentrations associated with decreased intestinal motility in horses
IntroductionAtropine is an essential part of the treatment protocol for equine uveitis. Topical atropine administration has been associated with decreased intestinal motility and abdominal pain in horses. Experimental studies have indicated that frequent dosing is associated with a higher risk than dosing every 6 h. Unfortunately, no quantitative pharmacodynamic data for inhibition of the equine gut are published. Materials and methodsEight standardbred horses were assigned to receive either atropine or saline (control) to be infused over 30 min in a two-treatment cross-over design. Atropine concentrations in plasma were measured using ultra-high-performance liquid chromatography-tandem mass spectrometry. Intestinal motility was measured using borborygmi frequency and electrointestinography (EIG). Experimental data were analyzed using a non-linear mixed effects model. The model was then used to simulate different dosing regimens. ResultsAtropine significantly decreased borborygmi response and EIG response. Six horses developed clinical signs of abdominal pain. The pharmacokinetic typical values were 0.31, 1.38, 0.69, and 1.95 L/kg center dot h for the volumes of the central, the highly perfused, the scarcely perfused compartments, and the total body clearance, respectively. The pharmacodynamic typical values were 0.31 mu g/L and 0.6 and 207 nV(2)7 cpm for the plasma concentration at 50% of the maximum response and the maximum response and the baseline of cecal EIG response, respectively. Six different dosing regimens of topical atropine sulfate to the eye (0.4 and 1 mg every hour, every 3 h, and every 6 h) were simulated. ConclusionThe IV PK/PD data coupled with simulations predict that administration of 1 mg of topical atropine sulfate administered to the eye every hour or every 3 h will lead to atropine accumulation in plasma and decreased intestinal myoelectric activity. Administration every 6 h predicted a safe dosing regimen in full-sized horses. Clinical studies would be valuable to confirm the conclusions. For smaller equids and horses put at risk for colic due to othercauses, droplet bottles that deliver 40 mu l of 1% atropine sulfate per drop or less may be used to lower the risk further
Effect of infrared and red monochromatic light on equine wound healing
Background Light-emitting diodes (LEDs) are commonly used for treating a variety of disorders in horses, including wounds. Despite its claim to shorten healing times, there is a lack of scientific documentation regarding its effects.Objectives To investigate if treatment with pulsating visible red light (lambda approximate to 637 nm) and near-infrared (NIR) light (lambda approximate to 956 nm) affects wound healing.Study design Randomised blinded controlled experimental study.Methods A circular skin wound (o = 2 cm) was created on each side of the neck in eight healthy horses. One randomly chosen wound received light treatment and the other served as an untreated control. Treatment duration was 4 minutes and 40 seconds (red light 95 seconds, 2.3 mW/cm(2); NIR light 185 seconds, 6.4 mW/cm(2)) and was performed once daily on day 0-4, 7-11, 14-18 and 21-25. The wounds were photographed and evaluated using digital photoplanimetry on day 0, 1, 2, 3, 4, 7, 14, 21, 28 and 35. The degree of swelling was assessed with diagnostic ultrasound on the same days except the last recording was performed on day 36 instead of 35. Days to total healing was recorded. ANOVA was used for statistical analysis (P < .05).Results The wound area (P = .2-.9) and degree of swelling (P = .2-1.0) did not differ between treated and control groups on any day. There was a significant difference (P = .03) in healing time between control (49.0, 95% CI = 35.4-62.6 days) and treated wounds (51.8, 95% CI = 38.7-64.8 days).Main limitations The wounds were treated until day 25 and this study does not investigate the effect of a longer treatment period than 25 days.Conclusions The results of this study do not indicate any clinically relevant positive effect of pulsating visible red light and NIR light on the healing of experimental skin wounds in horses, compared with no treatment
Relation between pain and skeletal metastasis in patients with prostate or breast cancer.
The aim of this study was to examine the relation between pain and bone metastases in a group of patients with prostate or breast cancer that had been referred for bone scintigraphy. Whole-body bone scans, anterior and posterior views obtained with a dual detector gamma camera were studied from 101 consecutive patients who had undergone scintigraphy (600 MBq Tc-99m MDP) because of suspected bone metastatic disease. At the time of the examination, all patients were asked whether they felt any pain or had recently a trauma. This information was correlated with the classifications regarding the presence or absence of bone metastases made by a group of three experienced physicians. In patients with prostate cancer, we found metastases in 47% (18/38) of the patients with pain, but only in 12% (2/17) of the patients without pain (p = 0·01). In patients with breast cancer, on the other hand, metastases were more common in patients without pain (71%; 10/14) than in patients with pain (34%; 11/32) (p = 0·02). In conclusion, a significant relation between pain and skeletal metastases could be found in patients with prostate cancer and a reverse relation in patients with breast cancer
Plasma atropine concentrations associated with decreased intestinal motility in horses
IntroductionAtropine is an essential part of the treatment protocol for equine uveitis. Topical atropine administration has been associated with decreased intestinal motility and abdominal pain in horses. Experimental studies have indicated that frequent dosing is associated with a higher risk than dosing every 6 h. Unfortunately, no quantitative pharmacodynamic data for inhibition of the equine gut are published. Materials and methodsEight standardbred horses were assigned to receive either atropine or saline (control) to be infused over 30 min in a two-treatment cross-over design. Atropine concentrations in plasma were measured using ultra-high-performance liquid chromatography-tandem mass spectrometry. Intestinal motility was measured using borborygmi frequency and electrointestinography (EIG). Experimental data were analyzed using a non-linear mixed effects model. The model was then used to simulate different dosing regimens. ResultsAtropine significantly decreased borborygmi response and EIG response. Six horses developed clinical signs of abdominal pain. The pharmacokinetic typical values were 0.31, 1.38, 0.69, and 1.95 L/kg center dot h for the volumes of the central, the highly perfused, the scarcely perfused compartments, and the total body clearance, respectively. The pharmacodynamic typical values were 0.31 mu g/L and 0.6 and 207 nV(2)7 cpm for the plasma concentration at 50% of the maximum response and the maximum response and the baseline of cecal EIG response, respectively. Six different dosing regimens of topical atropine sulfate to the eye (0.4 and 1 mg every hour, every 3 h, and every 6 h) were simulated. ConclusionThe IV PK/PD data coupled with simulations predict that administration of 1 mg of topical atropine sulfate administered to the eye every hour or every 3 h will lead to atropine accumulation in plasma and decreased intestinal myoelectric activity. Administration every 6 h predicted a safe dosing regimen in full-sized horses. Clinical studies would be valuable to confirm the conclusions. For smaller equids and horses put at risk for colic due to othercauses, droplet bottles that deliver 40 mu l of 1% atropine sulfate per drop or less may be used to lower the risk further
A comparison of two imaging modalities for detecting lymphatic nodal spread in radiochemotherapy of locally advanced cervical cancer
Background and purpose: In uterine cervical cancer tumour spread reaching the para-aortic lymph nodes is the most significant independent pre-treatment predictor of progression-free survival. When introducing [18F]fluorodeoxyglucose-positron emission tomography (FDG-PET)/computed tomography (CT) in our clinic for patients with advanced cervical cancer planned for definitive radiochemotherapy, the purpose of this study was to quantify to what extent the added information lead to changes in radiotherapy planning. Material and methods: We included 25 consecutive patients with cervical cancer stages IB2 â IIIB planned for definitive radiochemotherapy between November 2010 and May 2012. The patients were examined both with magnetic resonance imaging (MRI) and FDG-PET/CT before treatment and after four weeks of treatment. Results: In 11/24 (46%) of the patients the FDG-PET/CT before treatment provided additional diagnostic information leading to changes in treatment planning compared to information from MRI. Seven of these eleven patients (64%) were alive and without evidence of disease at four-year follow-up. The MRI detected pelvic tumour spread not seen on the FDG-PET/CT in 2/24 patients. The disease-free four-year survival was 59%. Conclusions: Additional diagnostic information from FDG-PET/CT changed treatment strategy in almost half of the patients and may have increased chances of survival in this limited group of patients with locally advanced uterine cervical cancer. We recommend both modalities for nodal detection. Keywords: Cervical cancer, Nodal spread, Radiochemotherapy, FDG-PET/CT, MR