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Biomedical subjects

A Guerra

Publications and source records attributed to A Guerra.

At least 127 records · Page 7Linked to original sources
PubMedDate not supplied

[A method for permanent fixation of eggs of enteroparasitic helminths].

The results using the Hoyer method for examining eggs of helminths enteroparasites are presented. This method is particularly suited for teaching and on research purposes. Using this technique in fecal sample containing eggs of A. lumbricoides, T. trichiura, Uncinaria sp., Taenia sp., Diphyllobothrium sp., H. nana, H. diminuta and F. hepatica allowed the correct identification of then after 24 hours up to 180 days after the samples were obtained.

Animals↗
PubMedDate not supplied

Tumour response to heat and radiation: prognostic variables in the treatment of neck node metastases from head and neck cancer.

A total of 38 patients with 81 multiple neck node metastases from squamous cell carcinoma of head and neck were treated with radiotherapy alone or with radiotherapy plus hyperthermia. Irradiation was delivered following a three fractions per day schedule of 2 + 1.5 + 1.5 Gy/day, with 4 h intervals between fractions, up to a total dose of 60 Gy. Heat was applied by means of a 500 MHz apparatus. Temperature data were converted to equivalent minutes at 42.5 degrees (Eq 42.5). Initial complete response rates and local control distribution were compared for subgroups of tumour volume and thermal dose. The data indicated that the volume effect was less pronounced in the combined modality than in the radiation alone arm, suggesting that the addition of heat was more damaging to the large than to the small lesions. A striking thermal dose-response relationship was shown, although complete response rates increased only after a certain thermal dose was accumulated, clearly indicating the presence of a threshold dose.

Carcinoma, Squamous Cell↗
PubMedDate not supplied

Initial experience with the harmonic scalpel in liver surgery.

BACKGROUND/AIMS: Hepatectomies are generally performed using a crushing clamp or by finger fracture. New instruments such as ultrasonic aspirators or water jet dissectors are increasingly used for precise dissection of intrahepatic structures. An ultrasonically activated scalpel has been introduced, mainly for laparoscopic procedures. The potential of this instrument in liver surgery remains to be defined. METHODOLOGY: In a prospective study, we have tested the harmonic scalpel (Ultracision, Ethicon Endo-surgery) in 16 consecutive patients undergoing liver surgery. The ease of parenchymal dissection and the hemostatic effect of the ultrasonically vibrating blade was assessed in each operation. Blood loss and transfusions were recorded. RESULTS: One patient underwent excision of a liver cyst and 15 patients 16 hepatectomies for colorectal metastases (7 cases), hepatocarcinoma (5 cases) and other benign or malignant conditions (4 cases). The liver was cirrhotic in 4 cases. The performance of the harmonic scalpel for dissection, cutting and hemostasis was good or excellent in 16 operations, and poor in 1 hepatectomy in a cirrhotic liver. Median blood loss was 400 mL (range: 0-1200 mL) and 4 patients received blood transfusions. CONCLUSIONS: The harmonic scalpel allows efficient section of liver parenchyma, precise dissection of intrahepatic structures, good hemostasis and section of small intrahepatic vessels.

Adult↗
PubMedDate not supplied

[Characteristics of adolescent and adult young women diagnosed with human papilloma virus infection at the Center for Research on Human Reproduction (CIRH)].

We reviewed 239 charts of adolescents and young adults, who visited our clinic. The purpose was to know the incidence of the Human Papiloma Virus infection (HPVI), diagnosed by Pap's smears, and the relationship to a population with some gynecological and sociodemographic characteristics. The women age population was between 14-24 years old with a mean age of 19.9 years. Seventy (29.3%) were PIV positive and 169 (70.7%) negatives. About 75% among both groups (PIV + and -) began active sexual life between 15-19 years old. Among the women with 4 or more sexual partners, 55.6% were HPVI positive. About 60% of all women had never used any method before being admitted to the clinic. In this study there is no correlation between IVSA and HPVI. We do demonstrate that the greater the number of sexual partners, the highest the risk of a sexual acquired disease.

Adolescent↗
PubMedDate not supplied

Surgical treatment of synchronous hepatocellular and esophageal carcinoma: case report and review of literature.

Simultaneous presentation of hepatocellular carcinoma and esophageal carcinoma is rare. Few cases have been reported as surgically curable. We treated a caucasian man of 68 years who presented a voluminous hepatocellular carcinoma in the right lobe of the liver and a superficial squamous cell carcinoma of the middle third of the esophagus. Both tumors seemed curable with surgery. We adopted a treatment consisting of two steps: 1) curative hepatic right trisegmentectomy; 2) three months later transhiatal esophagectomy. Two units of blood were transfused for both operations. Simultaneous hepatectomy and esophagectomy have been published in seven cases. We opted for resecting the tumors in two distinct procedures to lower the operative risk. Because of the large size of the hepatocellular carcinoma and the small size of the esophageal carcinoma, hepatectomy was performed first. The delay between the two interventions did not compromise the prognosis that is actually dependent of the hepatocellular carcinoma.

Aged↗
PubMedDate not supplied

[Evaluation of atopy risk factors during the first year of life. Multicentric study].

The AA studied 406 newborn babies during the 1st year of life in order to verify the correlation between atopy risk factors and the appearance of early symptoms, particularly gastroenteric (GE). The results obtained did not demonstrate a significant difference concerning the blood cord IgE level and subsequent appearance of food allergy symptoms, whereas positive familiarity showed a better correlation. No significant difference was observed between breast--or formula--fed infants, or between those weaned before or after the 5th month of life. The comparison of dietary regimen adopted during the 1st quarter in the asymptomatic and atopic children respectively, demonstrated that the presence of predisposing factors influences the appearance of GE symptoms much more than the diet in itself. An allergologic study, randomly performed by Prick-test in 156 cases and by RAST in 200 cases, showed a prevalent, positive response with RAST technique in symptomatic children.

Follow-Up Studies↗