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Biomedical subjects

H Rey

Publications and source records attributed to H Rey.

23 records · Page 2Linked to original sources

[Results of ortho- and megavolt therapy of inoperable bronchial carcinoma].

Survival rates of patients with inoperable, histologically verified bronchial carcinoma are compared as to orthovoltage or megavoltage radiation therapy. With megavoltage therapy, better survival rates are obtained after one or two years; later on, an approximation of the comparison groups is to be observed with regard to life expectancy. The improvement in one-year and two-year survival rates does justify the application of megavoltage therapy.

Adult↗

Birth-related fatigue in 34-36-week preterm neonates: rapid recovery with very early kangaroo (skin-to-skin) care.

OBJECTIVE: To test preterm neonates' physiologic and behavioral responses when placed skin-to-skin on their mother's chests, called kangaroo care (KC), for the first 6 hours after birth, instead of having the neonates go to an intensive care unit. DESIGN: Convenience sampling was used in this descriptive study to enroll neonates who were given continuous KC beginning soon after birth in the delivery room and continuing for 6 hours. Heart rate, respiratory rate, oxygen saturation, abdominal temperature, and behavioral state were recorded each minute. SETTING: Data were collected in the delivery room and in a private labor room in tropical Cali, Colombia. PARTICIPANTS: Six 34-36-week preterm neonates with 5-minute APGAR scores of 6 or more were enrolled. Two neonates had grunting respirations before KC was begun. RESULTS: Temperature rose rapidly to thermoneutral range. With few exceptions, heart rate, respiratory rate, and oxygen saturation remained within normal limits; grunting respirations in two neonates disappeared with warmed humidified oxygen and continuous KC. Sleep predominated, and neonates were discharged home by 48 hours being fully breastfed, suggesting that KC was an environment conducive to recovery from fatigue. CONCLUSIONS: These data suggest that KC beginning in the delivery room can be given safely and perhaps with benefit to 34-36-week gestation neonates who appear healthy at birth. Kangaroo care was conducive to recovery from birth-related fatigue.

Body Temperature↗

Cryopreservation of seeds and in vitro-cultured protocorms of Oncidium bifolium sims. (Orchidaceae) by encapsulation-dehydration.

Encapsulation-dehydration was employed for cryopreserving seeds and in vitro-cultured protocorms of Oncidium bifolium. Freshly harvested seeds, 120 days after pollination, were encapsulated in beads containing 1/2 MS medium with 3% sucrose and 3% calcium alginate and subsequently pretreated in agitated (80 rpm) liquid medium supplemented with 0.15 M sucrose (24 h) followed by 0.25 M sucrose (48 h), 0.5 M sucrose (24 h) and 0.75 M sucrose (24 h). The beads with seeds were dehydrated with silica gel for 5 h to 19.2% moisture content and immersed in liquid nitrogen for 1 h, thawed at 30 degrees C for 2 min, post-treated using the same series of liquid media [0.5 M sucrose (24 h), 0.25 M sucrose (48 h), 0.15 M sucrose (24 h)], and recultured on 1/2 MS medium with 0.1M sucrose and 0.7% percent agar. As much as 4.8% of the cryopreserved seeds produced complete plants. In-vitro cultured protocorms were successfully cryopreserved following the same procedure, allowing 11.3% of them to produce plants.

Cryopreservation↗