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Biomedical subjects

C Frost

Publications and source records attributed to C Frost.

47 records · Page 3Linked to original sources
PubMed1994

Knowledge of malignant melanoma and how it relates to clinical practice among nurse practitioners and dermatology and oncology nurses.

Cutaneous malignant melanoma (CMM) is a growing health problem in the United States. This study evaluated nurses' frequency of skin cancer assessment, ability to recognize CMM, knowledge of risk factors and preventive measures, teaching practices, and barriers to skin cancer assessment. The sample (n = 178) consisted of nurse practitioners (NP), oncology nurses (ON), and dermatology nurses (DN). The participants indicated that skin cancer assessment was within their scope of practice but reported frequencies of performance were low. NP scored lower in overall knowledge, although they had received the highest level of formal skin cancer education (p < 0.05). Recognition of melanoma was moderate, with scores of 54-68% for the three groups. Recognition scores for premalignant and benign lesions were lower. Frequency of skin cancer assessment and teaching were higher for DN (p < 0.05). Total knowledge scores were not predictive of teaching practices. Time limitations and inadequate knowledge were barriers that inversely correlated with frequency of skin cancer assessment. Findings suggest that individual CMM knowledge and experience correlated highly with frequency of assessment and teaching. Programs are needed to educate nurses in skin cancer prevention and detection. The broader implications for future research will be presented.

Adult↗
PubMed1993

Sequences homologous to the human X- and Y-borne zinc finger protein genes (ZFX/Y) are autosomal in monotreme mammals.

The human zinc finger protein genes (ZFX/Y) were identified as a result of a systematic search for the testis-determining factor gene on the human Y chromosome. Although they play no direct role in sex determination, they are of particular interest because they are highly conserved among mammals, birds, and amphibians and because, in eutherian mammals at least, they have active alleles on both the X and the Y chromosomes outside the pseudoautosomal region. We used in situ hybridization to localize the homologues of the zinc finger protein gene to chromosome 1 of the Australian echidna and to an equivalent position on chromosomes 1 and 2 of the platypus. The localization to platypus chromosome 1 was confirmed by Southern analysis of a Chinese hamster x platypus cell hybrid retaining most of platypus chromosome 1. This localization is consistent with the cytological homology of chromosome 1 between the two species. The zinc finger protein gene homologues were localized to regions of platypus chromosomes 1 and 2 that included a number of other genes situated near ZFX on the short arm of the human X chromosome. These results support the hypothesis that many of the genes located on the short arm of the human X were originally autosomal and have been translocated to the X chromosome since the eutherian-metatherian divergence.

Animals↗
PubMed1992

The most important needs of parents of critically ill children: parents' perceptions.

Research studies have identified the needs of relatives when they have had an adult family member in the intensive care unit. However little similar work has been done within the paediatric setting. Therefore the aim of this study was to examine what parents considered to be their most important needs, when they have a child ill in the intensive care environment (PICU). A questionnaire was designed, and was distributed to parents of 30 children admitted into a PICU. The questionnaire identified needs items which may be important to parents of sick children. The parents were required to indicate how important each need was to them during the time of the child's stay in the PICU. Results obtained indicate that parents have a strong need for information and relief of anxieties that they may have about their child's condition. A conclusion reached in this study is that if the critical care staff can go some way to assess and meet the needs of parents of critically ill children, then these parents may be more able to become effective partners in care, which may have therapeutic effects upon the child's health recovery.

Adult↗
PubMed1991

Implications of smoking bans in the workplace. A nursing perspective.

1. The occupational health nurse is in a strategic position to promote changes in smoking policies, participate in effective planning and implementation of policy changes, and encourage workers to participate in smoking cessation programs. 2. Nursing process, including data collection and assessment, development of a plan, implementation, and evaluation, provides a framework for action for the informed occupational health nurse. 3. Those policies that are part of an overall health promotion program, including individualized health risk assessment, are most successful in encouraging employees to stop smoking. 4. Development of or changes in smoking policies are emotionally laden issues that require considerable planning, effective communication, and involvement of employees at every level of the organization.

Ethics, Nursing↗
PubMed1990

Serum levels of CA 125 during the first trimester of normal outcome, ectopic and anembryonic pregnancies.

Single serum samples were obtained during the first trimester of pregnancies with a retrospectively normal outcome (n = 150), ectopic pregnancies (n = 38) and anembryonic pregnancies (n = 78). Serial samples during the first trimester were also obtained from 43 women achieving pregnancy following successful treatment for infertility and with a retrospectively defined normal outcome. Significant variation in serum CA 125 levels in relation to gestational age was observed in pregnancies with a normal outcome (P less than 0.0001). Peak serum CA 125 levels were observed at 6-7 weeks, the mean level at this gestation being 40.1 U/ml (range 31.7-50.7 U/ml) in the normal conception/normal outcome group and 36.5 U/ml (range 25.6-52.0 U/ml) in the assisted conception/normal outcome group. A rise and fall in serum CA 125 levels during the first trimester was observed in 42 of 43 assisted conceptions monitored serially, with peak levels ranging from 7 to 1398 U/ml (median 48.8 U/ml) occurring at 28-61 days (median 45 days) gestation. Mean serum CA 125 levels were higher in the anembryonic pregnancy group at 4-5 and 6-7 weeks gestation than in both normal pregnancy outcome groups (P less than 0.01).

Antigens, Tumor-Associated, Carbohydrate↗
PubMed1990

A risk of malignancy index incorporating CA 125, ultrasound and menopausal status for the accurate preoperative diagnosis of ovarian cancer.

Age, ultrasound score, menopausal status, a clinical impression score and serum CA 125 level were assessed to see how they could best distinguish between patients with benign (n = 101) and malignant (n = 42) pelvic masses. Each criteria used alone provided statistically significant discrimination. The most useful individual criteria were a serum CA 125 level of 30 U/ml (sensitivity 81%, specificity 75%) and an ultrasound score of 2 (sensitivity 71%, specificity 83%). Three criteria could be combined in a risk of malignancy index (RMI) which is simply calculated using the product of the serum CA 125 level (U/ml), the ultrasound scan result (expressed as a score of 0, 1 or 3) and the menopausal status (1 if premenopausal and 3 if postmenopausal). This index was statistically virtually as effective a discriminant between cancer and benign lesions as more formal methods. Using an RMI cut-off level of 200, the sensitivity was 85% and the specificity was 97%. Patients with an RMI score of greater than 200 had, on average, 42 times the background risk of cancer and those with a lower value 0.15 times the background risk.

Adult↗
PubMedDate not supplied

Purification and characterization of ostrich prothrombin.

The work focused on the penultimate enzyme, prothrombin, in the coagulation cascade. Prothrombin was purified and characterized from ostrich plasma. The results obtained contribute to a better understanding of blood coagulation in the ostrich and the evolution of prothrombin and the coagulation cascade. Prothrombin was purified from ostrich plasma by barium chloride precipitation, ammonium sulfate fractionation, and DEAE-cellulose and Cu(2+)-chelate Sepharose chromatography. Ostrich prothrombin exhibited a M(r) of 72,800 and a pI of 6.9 using SDS-PAGE and PAG-isoelectrofocusing, respectively. The N-terminal sequence of ostrich prothrombin showed 78 and 87% identity with human and bovine, respectively. The cDNA was isolated from ostrich liver and the predicted amino acid sequence compared with those from other species. Ostrich prothrombin shares sequence identity with chicken (84%), human (60%), bovine (59%), rat (60%), mouse (59%) and hagfish (50%) prothrombin, suggesting a common function of prothrombin in these vertebrates. Amino acid sequence identities indicate that the thrombin beta-chain (62%) and the propeptide-Gla (75%) domains are the regions most constrained for the common functions of vertebrate prothrombins. Ostrich prothrombin, therefore, shows similarity in structure to other vertebrate prothrombins.

Amino Acid Sequence↗