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Larynx preservation in head and neck cancers. A discussion of the National Comprehensive Cancer Network Practice Guidelines.

The management of advanced cancers of the larynx and hypopharynx has become increasingly complex as different treatment modalities, including surgery, radiation, and chemotherapy, have been combined with the goal of improving local disease control and disease-specific survival. A union of 17 comprehensive cancer centers in the United States, the National Comprehensive Care Network (NCCN), was formed in 1995 to promote state-of-the-art cancer care. To achieve this goal, multidisciplinary panels of experts from member institutions have created disease-specific practice guidelines for the evaluation and treatment of cancer patients, including those with head and neck cancers. Although detailed analysis of surgical methods and radiation techniques are beyond the scope of this article, the evolving laryngeal preservation strategies for patients with advanced, resectable hypopharyngeal or laryngeal (including supraglottic and glottic) cancers are reviewed using relevant sections of the NCCN practice guidelines as a framework for discussion.

Antineoplastic Agents↗

Effectiveness of a comprehensive breast cancer-screening class for women residing in rural areas.

The purpose of this study was to investigate the effectiveness of two different educational methods on the variables of knowledge gains of breast self-examination as a cancer-screening device and the subsequent frequency of breast self-examination for women living in rural areas. Two educational methods were used: (A) a comprehensive class and (B) an information session using a brochure. The experimental group attended a comprehensive class on breast cancer screening that included a presentation where one of the investigators used American Cancer Society materials and modeled breast self-examination. The comparison group attended an information session in which a brochure by the American Cancer Society was given to the women as the educational modality. The sample was one of convenience and was comprised of 103 women living in rural areas. The experimental group included 50 women and the comparison group was made up of 53 women. The findings indicated that each group made significant gains in knowledge from the pretest to the posttest with the teaching method used. Each group retained approximately the same amount of knowledge at the 3-month follow-up test, and each group had an increased frequency of performing breast self-examination.

Adult↗

Utilization of comprehensive geriatric assessment in cancer patients.

A growing and diverse aging population, recent advances in research on aging and cancer, and the fact that a disproportional burden of cancer still occurs in people aged 65 years and older have generated great interest in delivering better cancer care for older adults. This is particularly true as more survivors of cancer live to experience cancer as a chronic disease. Cancer and its treatment precipitate classic geriatric syndromes such as falls, malnutrition, delirium, and urinary incontinence. Comprehensive Geriatric Assessment (CGA), by taking all patient's needs into account and by incorporating patient's wishes for the level of aggressiveness of treatment, offers a model of integrating medical care with social support services. It holds the promise of controlling health care costs while improving quality of care by providing a better match of services to patient needs. Three decades after the CGA was initially developed in England, oncologists have begun taking notice on the potential benefits that CGA might bring to the field of geriatric oncology. This article describes the utilization of the CGA in cancer patients with an eye toward promoting interdisciplinary care for older cancer patients. To set an initial context, a search of computerized databases took place, using "comprehensive geriatric assessment" and "cancer" as keywords. A selection of literature from between 1980 and 2003 was reviewed. Additional articles were identified through the bibliography of relevant articles.

Aged↗

A comprehensive strategy for the evaluation and triage of the chest pain patient: a cost comparison study.

BACKGROUND: Our objective was to determine the cost-effectiveness of a comprehensive, risk-based triage system, composed of multiple critical pathways, with the use of early myocardial perfusion imaging (MPI) in low-risk patients. We found previously that a chest pain evaluation system that uses MPI in low-risk patients was safe and effective, but the cost-effectiveness of this approach was not studied. METHODS AND RESULTS: We compared two groups. The Acute Cardiac Team (ACT) group (n = 874) was assigned prospectively to 1 of 4 risk levels by emergency department (ED) physicians. Level 1, 2, and 3 patients were admitted; level 4 patients were evaluated in the ED. Level 3 and 4 patients underwent ED MPI. The control group (n = 713) represented consecutive patients evaluated in the prior year according to standard care and assigned retrospectively to an ACT level based on the presenting electrocardiographic and clinical data. Record and hospital administrative data were assessed for clinical variables, outcomes, lengths of stay, and all expenses incurred within 30 days of the index visit. The baseline characteristics of the two groups were similar, including age, sex, myocardial infarction prevalence, and 30-day revascularization rates within each level or between the two groups. Mean costs per encounter were reduced for the ACT patients for each level, which was significant when all patients were compared ($5,030 +/- $7,081 vs $6,044 +/- $10,432, P =.02). Use of MPI in the low-risk patients was associated with reduced costs (level 3, $4,958 +/- $4,948 vs $5,051 +/- $7,036; level 4, $1,529 +/- $2,664 vs $1,794 +/- $6,854) and was associated with a significantly lower angiography rate and shorter length of stay. CONCLUSIONS: Implementation of a comprehensive strategy for chest pain evaluation and triage reduced overall costs for patients with chest pain on presentation. Acute MPI in the ED setting did not increase net cost.

Adult↗

Verbal working memory and sentence comprehension.

This target article discusses the verbal working memory system used in sentence comprehension. We review the concept of working memory as a short-duration system in which small amounts of information are simultaneously stored and manipulated in the service of accomplishing a task. We summarize the argument that syntactic processing in sentence comprehension requires such a storage and computational system. We then ask whether the working memory system used in syntactic processing is the same as that used in verbally mediated tasks that involve conscious controlled processing. Evidence is brought to bear from various sources: the relationship between individual differences in working memory and individual differences in the efficiency of syntactic processing; the effect of concurrent verbal memory load on syntactic processing; and syntactic processing in patients with poor short-term memory, patients with poor working memory, and patients with aphasia. Experimental results from these normal subjects and patients with various brain lesions converge on the conclusion that there is a specialization in the verbal working memory system for assigning the syntactic structure of a sentence and using that structure in determining sentence meaning that is separate from the working memory system underlying the use of sentence meaning to accomplish other functions. We present a theory of the divisions of the verbal working memory system and suggestions regarding its neural basis.

Cognition↗

Overextensions in comprehension and production revisited: preferential-looking in a study of dog, cat, and cow.

This study investigated overextensions in comprehension and production using a new method (the preferential-looking paradigm) in which children (N = 99, mean age (younger) = 1;9, mean age (older) = 2;3) were asked to find the referent that matched the label they were given. Both Real Referent (in which there was a match) and Anomalous (in which there was no match) trials were included, as well as nonverbal control trials. During the Real Referent trials, all children significantly preferred the matching puppet. During the Anomalous trials, children showed no preference with two of the labels (dog and cat); however, they did show a preference when 'cow' was requested but not available. There were no differences based on prior overextension performance in production. It is concluded that overextensions in production are not diagnostic of children's underlying semantic representations, and that anomalous trials in comprehension provide useful information concerning young children's lexical entries.

Attention↗

Comprehension and production of gesture in combination with speech in one-word speakers.

This study explores the role that gesture plays in the earliest stages of language learning. We describe how one-word speakers use gesture in combination with speech in their spontaneous communications, and interpret gesture presented in combination with speech in an experimental situation. Forty one-word speakers (ages 1;2.22 to 2;4.6) were videotaped in a free-play session which provided data on the child's spontaneous gesture and speech production. The children were also given a comprehension task in which the presence and absence of gesture were systematically varied in relation to speech. We found that (1) all of the children spontaneously produced gestures in combination with speech, and (2) all of the children were able to understand gesture when it was presented in combination with speech, not only when the gesture was redundant with speech but also when the gesture substituted for speech. These data suggest that, even at this young age, gesture naturally forms an integrated system with speech in both production and comprehension.

Concept Formation↗

The role of modelling and request type on symbolic comprehension of objects and gestures in young children.

In a first study, we considered whether modelling and the type of an adult's request influenced children's ability at 1;8 and 2;2 to comprehend gestures and replica objects as symbols for familiar objects. In a second study, we evaluated whether modelling and type of request influenced children's ability at 1;8 (N = 24) to understand unfamiliar (i.e. unconventional) objects as symbols. Results of Study 1 indicated that children at 2;2 comprehended a gesture as a symbol in the absence of any previous model demonstration. All children comprehended a replica as standing for another object, although modelling marginally improved children's performance at 2;2 and decreased performance at 1;8. In general, the type of request did not influence children's comprehension of gestures or replicas as symbols. Results of Study 2 showed that modelling and request type did not influence children's understanding of objects that are unconventional and novel, as symbols. The studies converge to suggest that symbolic comprehension is a highly context-dependent ability that continues to develop over the second year.

Child, Preschool↗

Evaluation of reading comprehension with neuropsychological and event-related brain potential (ERP) methods.

Evidence is presented for the efficacy of a new method of assessing reading comprehension using a standardized reading test that was formatted for computer presentation with simultaneous event-related brain potential (ERP) recordings. Reading comprehension abilities of 23 healthy undergraduate students were evaluated using ERPs. The results revealed a differential ERP response pattern for correct and incorrect test items. These response patterns were observed at individual participant levels. The findings provided further support for the use of ERPs in the neuropsychological assessment of patients who are difficult or impossible to assess using behavioral responses because of concomitant motoric and/or communicative limitations.

Adult↗

Comprehensive two-dimensional gas chromatography and chemometrics for the high-speed quantitative analysis of aromatic isomers in a jet fuel using the standard addition method and an objective retention time alignment algorithm

A high-speed quantitative analysis of aromatic isomers in a jet fuel sample is performed using comprehensive two-dimensional gas chromatography (GC x GC) and chemometrics. A GC x GC separation time of 2.8 min is achieved for three aromatic isomers in jet fuel, which is 5 times faster than a reference method in which a singlecolumn separation resolves two of the three isomers of interest. The high-speed GC x GC separation is more than 10 times faster than a recent GC x GC separation that fully resolves the three components of interest in gasoline. The high-speed GC x GC analysis of jet fuel is accomplished through short GC columns, high gas velocities, and partial chromatographic peak resolution followed by chemometric resolution of overlapped peaks. The standard addition method and an objective retention time alignment algorithm are used to correct for retention time variations prior to the chemometric data analysis. The standard addition method corrects for chemical matrix effects that cause analytes in complex samples to have peak shapes, widths, and retention times that differ considerably from those of calibration standards in pure solvents. The retention time alignment algorithm corrects for the relatively small retention time variations caused by fluctuating instrumental parameters such as flow rate and temperature. The use of data point interpolation in the retention time alignment algorithm results in a more accurate retention time correction then previously achieved. The generalized rank annihilation method (GRAM) is the chemometric technique used to resolve the overlapped GC x GC peaks. The correction of retention time variations allows for successful GRAM signal deconvolution. Using the retention time alignment algorithm, GRAM quantification accuracy and precision are improved by a factor of 4. The methodology used in this paper should be applicable to other comprehensive separation methods, such as two-dimensional liquid chromatography, liquid chromatography coupled with capillary electrophoresis, and liquid chromatography coupled with gas chromatography.

Journal Article↗

Partial modulation method via pulsed flow modulator for comprehensive two-dimensional gas chromatography.

A partial modulation method by using a pulsed-flow modulator for comprehensive two-dimensional gas chromatography is proposed. The method is based on the fact that when a pulsed flow of inert gas is introduced into the conjunction between a primary and a secondary column, the concentration of analyte is disturbed, and a plug of higher or lower concentration is created. The plug, which forms a spike signal coupled to the primary GC signal, is then separated in a secondary column, creating a new dimension of GC information. The modulation is partial because only a fraction of the primary signal is modulated and converted into the secondary signal; the remaining primary signal stays unchanged. Therefore, this method yields a comprehensive two-dimensional chromatogram and a primary one-dimensional chromatogram in a single GC run. In this study, the modulation mode, modulation index, and modulation percentage are discussed and the reproducibility of peak areas and retention time are investigated. With a 5.8% modulation percentage and a primary peak half-width 1.7 times wider than the modulation time, the standard deviation for the peak areas are 0.15% for the primary and 0.78% for the secondary chromatograms. Chromatograms of laboratory-mixed hydrocarbons and of high-temperature fuel oil no. 6 standard are demonstrated.

Journal Article↗

Modulation ratio in comprehensive two-dimensional gas chromatography.

Comprehensive two-dimensional chromatography employs a serially coupled two-column arrangement where effluent from the first column is collected or sampled and then introduced to the second column according to a chosen modulation period. This is effected by use of a modulator at or near the column junction. One of the considerations in applying the technique is the period of the modulator, which determines the sampling duration of the first column effluent. Here, we propose that the sampling rate can be most effectively described by a new term, called the modulation ratio (MR). This is defined as the ratio of 4 times the first column peak standard deviation (4sigma) divided by the modulation period (PM) or 1.6985 times the half-height width of the peak (wh): MR = 4sigma/PM = wb/PM = (wh x 1.6985)/PM. The 4sigma value is more commonly recognized as the peak base width (wb). The use of 4sigma as the numerator is preferred to simply sigma because when the PM value used for an experiment is equal to sigma, then the MR value is calculated to be 4, implying that the primary peak will be modulated approximately 4 times as is normally recommended for a comprehensive multidimensional separation. The less well-defined term of modulation number (NM) has been previously used and proposed as the number of modulations per peak and, therefore, is intended to convey the manner in which the primary column peak is sampled; this is a subjective and not well-characterized value. The use of MR should provide users with a meaningful and strictly defined value when reporting experimental conditions. The utility of MR is demonstrated through a mathematical model of the modulation process for both Gaussian and tailing peaks, supported by an experimental study of the modulation ratio. It is shown that for the analysis of trace compounds where precise quantitative measurements are being made, the experiment should be conducted with an MR of at least 3. Conversely, for semiquantitative methods or the analysis of major components, an MR of approximately 1.5 should suffice.

Journal Article↗

Automated instrumentation for comprehensive isotachophoresis-capillary zone electrophoresis

An automated comprehensive isotachophoresis-capillary zone electrophoresis (ITP-CZE) system is described. The sample is focused in the first capillary by ITP and injected repeatedly into the second smaller diameter capillary for more rapid CZE separation. Since only small portions of the concentrated zones are sequentially injected for CZE separation, overloading was not observed. Moreover, the sensitivity is enhanced because all of the concentrated zones are analyzed and the results are summed. A single detector (only for the CZE dimension) is required, and accurate timing for CZE injection is not necessary. The system was evaluated using a mixture of angiotensins. The effect of addition of leading electrolyte at the junction of the ITP and CZE capillaries before each CZE run on comprehensive ITP-CZE peak area was studied, and leading electrolyte volumes between 7 and 11 microL led to the best sensitivity. Under optimized conditions, a detection limit of approximately 5 nM could be achieved by injecting 10 microL of angiotensin solution.

Journal Article↗

Critical analysis of the mathematical relationships and comprehensiveness of life cycle impact assessment approaches.

The impact assessment phase of Life Cycle Assessment (LCA) has received much criticism due to lack of consistency. While the ISO standards for LCA did make great strides in advancing the consensus in this area, ISO is not prescriptive, but has left much room for innovation and therefore inconsistency. To address this lack of consistency, there is currently an effort underway to provide a conceptual framework for Life Cycle Impact Assessment (LCIA) and a recommended practice to include a list of impact categories, category indicators, and underlying methodologies. This is an enormous undertaking, especially in light of the current fundamental lack of consensus of the basic elements to be included in a LCIA (e.g., impact categories, impacts, and areas of protection). ISO 14042 requires selection of impact categories that "reflect a comprehensive set of environmental issues" related to the system being studied, especially for "comparative assertions" that involve public marketing claims. To be comprehensive, it is necessary to have a listing of impacts that "could" be included within the LCIA before entering into discussions of impacts that "should" be included. In addition to providing a critical analysis of existing and emerging impact assessment approaches, this paper will formulate a structured representation that allows more informed selection of approaches. The definitions and relationships between midpoint, endpoint, damage, and areas of protection will be presented in greater detail, along with the equations that are common to many of the approaches. Finally, a discussion of the advantages and disadvantages of displaying results at various stages in the environmental models will be presented in great detail.

Animals↗

CHMIS-C: a comprehensive herbal medicine information system for cancer.

A comprehensive herbal medicine information system for cancer (CHMIS-C) has been developed. The current version of the database integrates information on more than 200 anticancer herbal recipes that have been used for the treatment of different types of cancer in clinic, 900 individual ingredients, and 8500 small organic molecules isolated from herbal medicines. Furthermore, subsidiary databases of literature references and molecular targets have been constructed. A number of web-based searching tools have been developed and integrated into the information system for efficient data mining. The compounds in the database have been linked to the corresponding entries in the National Cancer Institute's database, and to a database of drugs approved by the U.S. Food and Drug Administration. This paper provides a description of the individual subsidiary databases, integration of the entire database, and data mining tools. We demonstrate that this comprehensive information system may be used as an effective informatics tool for anticancer drug discovery.

Antineoplastic Agents, Phytogenic↗

Extended Range Proteomic Analysis (ERPA): a new and sensitive LC-MS platform for high sequence coverage of complex proteins with extensive post-translational modifications-comprehensive analysis of beta-casein and epidermal growth factor receptor (EGFR).

We have developed a new and sensitive LC-MS platform, Extended Range Proteomic Analysis (ERPA), which is able to achieve very high sequence coverage and comprehensive characterization of post-translational modifications in complex proteins. This new platform provides advantages of both the top-down and bottom-up proteomic approaches by combining (i) digestion of the protein with an enzyme, such as Lys-C, which cuts less frequently than trypsin, leading to on average a higher molecular weight peptide size, (ii) high-performance LC separation of the resulting fragments, (iii) a new data acquisition strategy using the LTQ-FTMS, a hybrid mass spectrometer that couples a linear ion trap with a Fourier transform ion cyclotron resonance (FTICR) cell, for analysis of peptides in the range of 0.5 to 10 kDa, and (iv) new data analysis methods for assigning large peptide structures and determining the site of attachment of post-translational modifications as well as structural features from the accurate precursor mass together with MS(2) and MS(3) fragmentations. The LC retention of the Lys-C fragments is increased, relative to a tryptic digest, due to the generally greater hydrophobicity of the larger peptides, a result that is particularly important for peptides containing hydrophilic modifications such as glycosylation and phosphorylation. Furthermore, additional positively charged arginine and lysine residues in the Lys-C fragments enhance the sensitivity of the post-translationally modified phospho- and glycopeptides by at least 10-fold relative to tryptic fragments. In typical operation, the FTICR cell provides a survey scan with the high mass resolution (> 100 000) and accurate mass (<2 ppm) to characterize the higher charge-state precursor ions of the larger peptides. In parallel, the linear ion trap provides MS(2) and MS(3) fragmentation spectra, with a scan speed sufficiently fast for on-line LC-MS. Together, these data provide multiple means to determine or enhance the confidence of assignment of large or complicated peptide. Using ERPA, we demonstrate >95% sequence coverage in the analysis of two heavily phosphorylated and glycosylated proteins, beta-casein at the 50 fmole level and the epidermal growth factor receptor (EGFR) at the 1 pmole level. In summary, the combination of digestion strategy, high-performance separation, and the hybrid LTQ-FTMS instrument enables comprehensive characterization of large proteins, including posttranslational modifications.

Amino Acid Sequence↗

Profile of a comprehensive psychiatric emergency program in a New York City municipal hospital.

This paper profiles the services provided, and the patient population treated, in a busy inner city Comprehensive Psychiatric Emergency Program (CPEP) located in Elmhurst, Queens, New York City. For each CPEP component, including the emergency room, extended observation unit and crisis services two years of data are reviewed. A diagnostic profile of patients seen, description of services, patient referrals and dispositions are presented. The children and adolescents treated in the CPEP are described in more detail, focusing on the high frequency of violence to self or others seen in their presenting problems. The CPEP's role in providing comprehensive community based services is discussed.

Adolescent↗

Agreement checking in comprehension: evidence from relative clauses.

Work on agreement processing in comprehension in English has provided evidence that the plural feature is "specified" or "marked" and that the syntactic structure of the subject plays a role in checking features. It is argued here that the structure intervening between the subject and verb also plays a role in checking and that there is pressure to check features immediately. A self-paced reading study tested this proposal in a previously unstudied configuration: agreement between the verb in a subject relative clause (RC) and the relative clause head (e.g., the niece of the actors who was/were...). According to the Construal Hypothesis (Frazier and Clifton, 1995), the structural relation between the RC and head is not immediately fully specified (unlike, for example, the relation between the subject and verb of a main clause). Thus, at the point when an agreeing verb is processed, the structure underlying the check may not yet be fully specified. This assumption about structural processing, together with the proposal for agreement checking in comprehension predicts (1) that there will be a large asymmetry between the processing of singular and plural agreeing verbs in the RC (larger than those seen in direct subject-verb predication) and (2) that there could be a role for agreement in determining RC attachment. Clear evidence for the first prediction was found: evidence for the second was inconclusive.

Humans↗