Effects of ozone therapy applied topically, by bagging, or both on the healing of clean wounds induced in rat's skin.

PURPOSE: This study aimed to evaluate the effects of ozone therapy applied topically and/or by bagging on the healing of clean wounds induced in rat's skin. METHODS: One hundred and twenty male rats of about 16 weeks old was divided into five groups: G1) saline solution (0.9%); G2) sunflower oil; G3) ozonated sunflower oil; G4) ozone bagging; G5) association of ozonated sunflower oil and ozone bagging. The wounds were evaluated through macroscopic, morphometric, histopathologic, and tensile strength analyses. RESULTS: Analysis among groups showed a lower percentage of wound contraction in G1 compared to G4 only in M7D. The tensile strength of the wounds showed differences among groups in the seventh (M7D) and the 14th (M14D) postoperative day, and among time points in G1 (M14D > M7D). The elongation of the wounds showed differences in G3 (M7D > M14D). Histological evaluation of the wounds showed significant change in bleeding, mixed to mononuclear infiltrate, congestion, and tissue disorganization for tissue organization between groups and time points. CONCLUSIONS: Ozone therapy applied topically and/or by bagging was not deleterious to the healing of clean wounds induced in rat's skin, but ozone bagging showed the best contribution to the healing process.

Evaluation of enteral and parenteral hyaluronic acid in induced ischemic skin flaps in rats: a double-blinded and randomized study.

PURPOSE: To evaluate exogenous hyaluronic acid (HA) derived from bacterial fermentation through enteral and parenteral routes in ischemic skin flaps induced in rats, using clinical and histological exams; and interleukins (IL) as tissue inflammatory biomarkers. METHODS: Sixty-four male adults Wistar rats with ischemic skin flaps on the dorsum were randomized into four groups, based on the treatment protocol: subcutaneous administration of saline solution (0.9%) (GI); oral administration of distilled water (GII); subcutaneous administration of HA (0.3%) (GIII); and oral administration of HA (1%) (GIV). Flaps of all groups were comparable regarding clinical and macroscopic evaluation, histological examination, pro-inflammatory cytokines (IL-1ß, IL-6, and tumor necrosis factor-α) and anti-inflammatory cytokine IL-10. RESULTS: A lower percentage of necrosis was identified in flaps treated with subcutaneous administration of HA (0.3%). The pro- and anti-inflammatory cytokines, epidermis thickness, blood vessels, and inflammatory cells showed statistically significant inter-group and intra-group differences (p < 0.05). CONCLUSIONS: High molecular HA (1,400 ~ 2,000 kDa) administrated by subcutaneous or oral route exhibited beneficial effects in ischemic skin flaps of rats. However, subcutaneous administration of HA (0.3%) showed better results in terms of the percentage of necrosis and epithelialization.

Effects of ozone therapy applied topically, by bagging, or both on the healing of clean wounds induced in rat's skin

ABSTRACT Purpose: This study aimed to evaluate the effects of ozone therapy applied topically and/or by bagging on the healing of clean wounds induced in rat's skin. Methods: One hundred and twenty male rats of about 16 weeks old was divided into five groups: G1) saline solution (0.9%); G2) sunflower oil; G3) ozonated sunflower oil; G4) ozone bagging; G5) association of ozonated sunflower oil and ozone bagging. The wounds were evaluated through macroscopic, morphometric, histopathologic, and tensile strength analyses. Results: Analysis among groups showed a lower percentage of wound contraction in G1 compared to G4 only in M7D. The tensile strength of the wounds showed differences among groups in the seventh (M7D) and the 14th (M14D) postoperative day, and among time points in G1 (M14D > M7D). The elongation of the wounds showed differences in G3 (M7D > M14D). Histological evaluation of the wounds showed significant change in bleeding, mixed to mononuclear infiltrate, congestion, and tissue disorganization for tissue organization between groups and time points. Conclusions: Ozone therapy applied topically and/or by bagging was not deleterious to the healing of clean wounds induced in rat's skin, but ozone bagging showed the best contribution to the healing process.

Evaluation of enteral and parenteral hyaluronic acid in induced ischemic skin flaps in rats: a double-blinded and randomized study

ABSTRACT Purpose: To evaluate exogenous hyaluronic acid (HA) derived from bacterial fermentation through enteral and parenteral routes in ischemic skin flaps induced in rats, using clinical and histological exams; and interleukins (IL) as tissue inflammatory biomarkers. Methods: Sixty-four male adults Wistar rats with ischemic skin flaps on the dorsum were randomized into four groups, based on the treatment protocol: subcutaneous administration of saline solution (0.9%) (GI); oral administration of distilled water (GII); subcutaneous administration of HA (0.3%) (GIII); and oral administration of HA (1%) (GIV). Flaps of all groups were comparable regarding clinical and macroscopic evaluation, histological examination, pro-inflammatory cytokines (IL-1β, IL-6, and tumor necrosis factor-α) and anti-inflammatory cytokine IL-10. Results: A lower percentage of necrosis was identified in flaps treated with subcutaneous administration of HA (0.3%). The pro- and anti-inflammatory cytokines, epidermis thickness, blood vessels, and inflammatory cells showed statistically significant inter-group and intra-group differences (p < 0.05). Conclusions: High molecular HA (1,400 ~ 2,000 kDa) administrated by subcutaneous or oral route exhibited beneficial effects in ischemic skin flaps of rats. However, subcutaneous administration of HA (0.3%) showed better results in terms of the percentage of necrosis and epithelialization.

Cardiorespiratory and haematologicalparameters of healthy french bulldogs / Parâmetros cardiorrespiratórios e hematológicos de cães sadios da raça buldogue francês

Brachycephalic dogs have a normal lower jaw and a receded upper jaw, and these dogs are predisposed to nostril stenosis, elongated palate, tracheal hypoplasia and hyperthermia due to heat stress. Giventhese characteristics, these dogs are more predisposed to respiratory and cardiovascular disorders. The popularity of brachycephalic dogsthathave a greatertendency for cardiorespiratory disorders, such as French bulldogs,has increased recently; however, studies on the cardiorespiratoryand haematological parameters in this breedare lacking. Thus, the present study sought to evaluatethe cardiorespiratory and haematological parameters of healthy French bulldogs to standardize normal values forthisbreed. Thirty-six French bulldogs wereused without predilection for age or sex, and the following parameters were evaluated: temperature (T), heart rate (HR), respiratory rate (RR), erythrogram, leukogram, total plasma protein, plasmatic fibrinogen, blood platelet count, urea, creatinine, alkaline phosphatase (AP) and alanine aminotransferase (ALT). The mean and standard deviation wereas follows: T°C (38.3±0.4), HR (111.1±27.0) beats per minute, RR (54.8±32.5) breaths per minute, erythrocyte count (7.3±1.2x106), haemoglobin (16.9±2.8 g/dL), haematocrit (48.9±7.7%), MCV (67.6±2.4fL), MCH (23.3±0.7 pg), MCHC (34.6±0.8%), RDW-CV (9.3±0.9; 9.2-12.0%), total leukocytes (11009.7±2907.3/mm3), band neutrophils (250.0±260.4/mm3), segmented neutrophils (7094.4±2307.3/mm3), eosinophils (589.7±561.3/mm3), lymphocytes (2020.8±1457.5/mm3), monocytes (987.6±528.4/mm3), total plasma protein (6.9±0.5 g/dL), plasmatic fibrinogen (274.1±96.5 mg/dL), blood platelet count (366.4±88.5/mm3), urea (35.2±12.6 mg/dL), creatinine (0.8±0.2/mg/dL), AP (49.1±25.8U/L),ALT (36.2±12.3U/L). The haematological parameters and heart rate were within the normal values for the species, but the respiratory rate values (54.8±32.5 breaths per minute)were greater than the normal averageof10 to 30 breaths per minute. We conclude thatthehaematological parameters and heart rateof healthy French bulldogs arewithin the normal limit for dogs; however, the respiratory rate is above referencevalues, reinforcing the notion that dogs of this breed, although healthy,exhibitan increasedrisk of respiratory disorders.(AU)

Cães braquicefálicosapresentam maxilar inferior normal, maxilar superior recuado, além disso, são predispostos à estenose de narina, palato alongado, hipoplasia traqueal e hipertermia por estresse por calor. Devido à essas características são mais predispostos à distúrbios respiratórios e cardiovasculares. A popularidade de cães braquicefálicos aumentou muito recentemente, como por exemplo, o Buldogue Francês, que possui uma maior tendência para transtornos cardiorrespiratórios, porém, não há estudos dos parâmetros cardiorrespiratórios e hematológicos nessa raça. Desta maneira, o presente estudo tem como objetivo avaliar os parâmetros cardiorrespiratórios e hematológicos de cães sadios da raça Buldogue Francês para padronização dos valores normais e servir de subsídios para a rotina clínica, cirúrgica, laboratorial e de futuros estudos nessa raça. Foram utilizados 36 cães da raça Buldogue Francês, sem predileção de idade, raça ou sexo e avaliados os seguintes parâmetros: temperatura (T), frequência cardíaca (FC), frequência respiratória (FR), eritrograma,leucograma, proteínas plasmáticas totais (PPT), fibrinogênio plasmático, contagem de plaquetas, ureia, creatinina, fosfatase alcalina (ALP) e alanino amino transferase (ALT). A média e desvio padrão foram: T°C (38,3±0,4), FC (111,1±27,0) batimentos/min, FR (54,8±32,5) movimentos/min, contagem de eritrócitos (7,3±1,2x106), Hb(16,9±2,8g/dL), VG(48,9±7,7%), VCM (67,6±2,4fL), HCM (23,3±0,7pg), CHCM (34,6±0,8%), RDW-CV (9,3±0,9; 9,2-12,0%), leucócitos totais (11009,7±2907,3/mm3), bastonetes (250,0±260,4/mm3), neutrófilos (7094,4±2307,3/mm3), eosinófilos (589,7±561,3/mm3), linfócitos (2020,8±1457,5/mm3), monócitos (987,6±528,4/mm3), PPT (6,9±0,5g/dL), fibrinogênio plasmático (274,1±96,5mg/dL), contagem de plaquetas (366,4±88,5/mm3), ureia (35,2±12,6mg/dL), creatinina (0,8±0,2/mg/dL), ALP (49,1±25,8U/L) e ALT (36,2±12,3U/L). Os parâmetros hematológicos e de frequência cardíaca ficaram dentro da normalidade, porém os valores da frequência respiratória (54,8±32,5) movimentos/min ficaram acima da média normal que é de 10 a 30 movimentos/min. Conclui-se que cães saudáveis da raça Buldogue Francês possuem parâmetros hematológicos e de frequência cardíaca dentro da normalidade para cães, porém, a frequência respiratória acima dos valores de referência, reforçando que cães dessa raça, mesmo saudáveis, possuem aumento do risco de transtornos respiratórios.(AU)

Cardiorespiratory and haematologicalparameters of healthy french bulldogs / Parâmetros cardiorrespiratórios e hematológicos de cães sadios da raça buldogue francês

Brachycephalic dogs have a normal lower jaw and a receded upper jaw, and these dogs are predisposed to nostril stenosis, elongated palate, tracheal hypoplasia and hyperthermia due to heat stress. Giventhese characteristics, these dogs are more predisposed to respiratory and cardiovascular disorders. The popularity of brachycephalic dogsthathave a greatertendency for cardiorespiratory disorders, such as French bulldogs,has increased recently; however, studies on the cardiorespiratoryand haematological parameters in this breedare lacking. Thus, the present study sought to evaluatethe cardiorespiratory and haematological parameters of healthy French bulldogs to standardize normal values forthisbreed. Thirty-six French bulldogs wereused without predilection for age or sex, and the following parameters were evaluated: temperature (T), heart rate (HR), respiratory rate (RR), erythrogram, leukogram, total plasma protein, plasmatic fibrinogen, blood platelet count, urea, creatinine, alkaline phosphatase (AP) and alanine aminotransferase (ALT). The mean and standard deviation wereas follows: T°C (38.3±0.4), HR (111.1±27.0) beats per minute, RR (54.8±32.5) breaths per minute, erythrocyte count (7.3±1.2x106), haemoglobin (16.9±2.8 g/dL), haematocrit (48.9±7.7%), MCV (67.6±2.4fL), MCH (23.3±0.7 pg), MCHC (34.6±0.8%), RDW-CV (9.3±0.9; 9.2-12.0%), total leukocytes (11009.7±2907.3/mm3), band neutrophils (250.0±260.4/mm3), segmented neutrophils (7094.4±2307.3/mm3), eosinophils (589.7±561.3/mm3), lymphocytes (2020.8±1457.5/mm3), monocytes (987.6±528.4/mm3), total plasma protein (6.9±0.5 g/dL), plasmatic fibrinogen (274.1±96.5 mg/dL), blood platelet count (366.4±88.5/mm3), urea (35.2±12.6 mg/dL), creatinine (0.8±0.2/mg/dL), AP (49.1±25.8U/L),ALT (36.2±12.3U/L). The haematological parameters and heart rate were within the normal values for the species, but the respiratory rate values (54.8±32.5 breaths per minute)were greater than the normal averageof10 to 30 breaths per minute. We conclude thatthehaematological parameters and heart rateof healthy French bulldogs arewithin the normal limit for dogs; however, the respiratory rate is above referencevalues, reinforcing the notion that dogs of this breed, although healthy,exhibitan increasedrisk of respiratory disorders.

Cães braquicefálicosapresentam maxilar inferior normal, maxilar superior recuado, além disso, são predispostos à estenose de narina, palato alongado, hipoplasia traqueal e hipertermia por estresse por calor. Devido à essas características são mais predispostos à distúrbios respiratórios e cardiovasculares. A popularidade de cães braquicefálicos aumentou muito recentemente, como por exemplo, o Buldogue Francês, que possui uma maior tendência para transtornos cardiorrespiratórios, porém, não há estudos dos parâmetros cardiorrespiratórios e hematológicos nessa raça. Desta maneira, o presente estudo tem como objetivo avaliar os parâmetros cardiorrespiratórios e hematológicos de cães sadios da raça Buldogue Francês para padronização dos valores normais e servir de subsídios para a rotina clínica, cirúrgica, laboratorial e de futuros estudos nessa raça. Foram utilizados 36 cães da raça Buldogue Francês, sem predileção de idade, raça ou sexo e avaliados os seguintes parâmetros: temperatura (T), frequência cardíaca (FC), frequência respiratória (FR), eritrograma,leucograma, proteínas plasmáticas totais (PPT), fibrinogênio plasmático, contagem de plaquetas, ureia, creatinina, fosfatase alcalina (ALP) e alanino amino transferase (ALT). A média e desvio padrão foram: T°C (38,3±0,4), FC (111,1±27,0) batimentos/min, FR (54,8±32,5) movimentos/min, contagem de eritrócitos (7,3±1,2x106), Hb(16,9±2,8g/dL), VG(48,9±7,7%), VCM (67,6±2,4fL), HCM (23,3±0,7pg), CHCM (34,6±0,8%), RDW-CV (9,3±0,9; 9,2-12,0%), leucócitos totais (11009,7±2907,3/mm3), bastonetes (250,0±260,4/mm3), neutrófilos (7094,4±2307,3/mm3), eosinófilos (589,7±561,3/mm3), linfócitos (2020,8±1457,5/mm3), monócitos (987,6±528,4/mm3), PPT (6,9±0,5g/dL), fibrinogênio plasmático (274,1±96,5mg/dL), contagem de plaquetas (366,4±88,5/mm3), ureia (35,2±12,6mg/dL), creatinina (0,8±0,2/mg/dL), ALP (49,1±25,8U/L) e ALT (36,2±12,3U/L). Os parâmetros hematológicos e de frequência cardíaca ficaram dentro da normalidade, porém os valores da frequência respiratória (54,8±32,5) movimentos/min ficaram acima da média normal que é de 10 a 30 movimentos/min. Conclui-se que cães saudáveis da raça Buldogue Francês possuem parâmetros hematológicos e de frequência cardíaca dentro da normalidade para cães, porém, a frequência respiratória acima dos valores de referência, reforçando que cães dessa raça, mesmo saudáveis, possuem aumento do risco de transtornos respiratórios.