Tissue electric properties in head and neck cancer patients

Background: The phase angle of the impedance vector was lower because of a decreased Xc component in hemodialysis patients with poorer prognosis, patients with hemodynamic instability, and in critically ill patients. The phase angle is easy to obtain. The aim of our study was to investigate in a cas...

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Veröffentlicht in:Annals of nutrition and metabolism 2006, Vol.50 (1), p.7-10
Hauptverfasser: Luis, D.A. de, Aller, R, Izaola, O, Terroba, M.C, Cabezas, G, Cuellar, L
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container_issue 1
container_start_page 7
container_title Annals of nutrition and metabolism
container_volume 50
creator Luis, D.A. de
Aller, R
Izaola, O
Terroba, M.C
Cabezas, G
Cuellar, L
description Background: The phase angle of the impedance vector was lower because of a decreased Xc component in hemodialysis patients with poorer prognosis, patients with hemodynamic instability, and in critically ill patients. The phase angle is easy to obtain. The aim of our study was to investigate in a case-control study the utility of phase angle and other impedance parameters in a population of male patients with head and neck cancer. Material and Methods: A case-control study was designed. A population of 67 ambulatory post-surgical male patients was enrolled with the following inclusion criteria: oral and/or laryngeal cancer confirmed by biopsy, without a recent loss weight (
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The phase angle is easy to obtain. The aim of our study was to investigate in a case-control study the utility of phase angle and other impedance parameters in a population of male patients with head and neck cancer. Material and Methods: A case-control study was designed. A population of 67 ambulatory post-surgical male patients was enrolled with the following inclusion criteria: oral and/or laryngeal cancer confirmed by biopsy, without a recent loss weight (<5% during previous 3 months) and signed informed consent. As reference group, we selected 70 male subjects from the same geographic region and matched by age, which were selected from a database of healthy people of our hospital. Basal blood sampling was performed for determinations of blood chemistry. Weight, height, body mass index and tetrapolar body electrical bioimpedance were performed in both groups. Results: A total of 67 head and neck cancer male patients were enrolled, mean age was 58.49 +/- 14.54 years, weight 73.32 +/- 11.4 kg and BMI 28.53 +/- 3.5. A total of 70 controls subjects were studied, mean age was 62.33 +/- 12.4 years. Weight 64.31 +/- 8.38 kg and BMI 24.33 +/- 3.2 were significantly lower than in cancer patients (p < 0.05). Renal function and blood sodium levels were similar in both groups. Anthropometric evaluation in cancer patients showed a mean fat mass lower than control patients (13.9 +/- 6.1 vs. 12.1 +/- 6.1 kg; p < 0.05). In control patients, fat-free mass was higher than in cancer patients (58.7 +/- 8.2 vs. 51.23 +/- 8.4 kg; p < 0.05). In cancer patients, reactance (62.3 +/- 17.2 vs. 56.6 +/- 15.1 ohm; p < 0.05) and phase angle (8.02 +/- 1.3 vs. 6.9 +/- 1.5 degrees ; p < 0.05) were lower than in control patients. Conclusion: Impedance in male head and neck cancer patients were characterized by a reduced reactance and phase angle. These early altered tissue electric properties appeared with a normal weight and body mass index.]]></description><identifier>ISSN: 0250-6807</identifier><identifier>EISSN: 1421-9697</identifier><identifier>DOI: 10.1159/000089484</identifier><identifier>PMID: 16272813</identifier><language>eng</language><publisher>Basel, Switzerland: S. Karger AG</publisher><subject>Adipose Tissue - metabolism ; bioelectrical impedance ; Biological and medical sciences ; Biopsy ; Blood ; blood chemistry ; Body Composition - physiology ; Body Constitution ; Body Height - physiology ; Body Mass Index ; Body Weight - physiology ; Case studies ; Case-Control Studies ; Creatinine ; Electric Conductivity ; Electric Impedance ; Electric properties ; Endocrinology ; head ; Head &amp; neck cancer ; Head and Neck Neoplasms - metabolism ; Head and Neck Neoplasms - physiopathology ; height ; Hemodialysis ; Hemodynamics ; Humans ; Impedance ; Informed consent ; Laryngeal cancer ; Male ; Medical prognosis ; Medical sciences ; men ; Metabolic diseases ; Middle Aged ; muscle tissues ; neck ; neoplasms ; Nutrition ; Original Paper ; Otorhinolaryngology (head neck, general aspects and miscellaneous) ; Otorhinolaryngology. Stomatology ; Patients ; phase angle alpha ; Prognosis ; Renal function ; Scandals ; Tumors ; weight</subject><ispartof>Annals of nutrition and metabolism, 2006, Vol.50 (1), p.7-10</ispartof><rights>2006 S. Karger AG</rights><rights>2006 S. Karger AG, Basel</rights><rights>2006 INIST-CNRS</rights><rights>Copyright (c) 2006 S. 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The phase angle is easy to obtain. The aim of our study was to investigate in a case-control study the utility of phase angle and other impedance parameters in a population of male patients with head and neck cancer. Material and Methods: A case-control study was designed. A population of 67 ambulatory post-surgical male patients was enrolled with the following inclusion criteria: oral and/or laryngeal cancer confirmed by biopsy, without a recent loss weight (<5% during previous 3 months) and signed informed consent. As reference group, we selected 70 male subjects from the same geographic region and matched by age, which were selected from a database of healthy people of our hospital. Basal blood sampling was performed for determinations of blood chemistry. Weight, height, body mass index and tetrapolar body electrical bioimpedance were performed in both groups. Results: A total of 67 head and neck cancer male patients were enrolled, mean age was 58.49 +/- 14.54 years, weight 73.32 +/- 11.4 kg and BMI 28.53 +/- 3.5. A total of 70 controls subjects were studied, mean age was 62.33 +/- 12.4 years. Weight 64.31 +/- 8.38 kg and BMI 24.33 +/- 3.2 were significantly lower than in cancer patients (p < 0.05). Renal function and blood sodium levels were similar in both groups. Anthropometric evaluation in cancer patients showed a mean fat mass lower than control patients (13.9 +/- 6.1 vs. 12.1 +/- 6.1 kg; p < 0.05). In control patients, fat-free mass was higher than in cancer patients (58.7 +/- 8.2 vs. 51.23 +/- 8.4 kg; p < 0.05). In cancer patients, reactance (62.3 +/- 17.2 vs. 56.6 +/- 15.1 ohm; p < 0.05) and phase angle (8.02 +/- 1.3 vs. 6.9 +/- 1.5 degrees ; p < 0.05) were lower than in control patients. Conclusion: Impedance in male head and neck cancer patients were characterized by a reduced reactance and phase angle. These early altered tissue electric properties appeared with a normal weight and body mass index.]]></description><subject>Adipose Tissue - metabolism</subject><subject>bioelectrical impedance</subject><subject>Biological and medical sciences</subject><subject>Biopsy</subject><subject>Blood</subject><subject>blood chemistry</subject><subject>Body Composition - physiology</subject><subject>Body Constitution</subject><subject>Body Height - physiology</subject><subject>Body Mass Index</subject><subject>Body Weight - physiology</subject><subject>Case studies</subject><subject>Case-Control Studies</subject><subject>Creatinine</subject><subject>Electric Conductivity</subject><subject>Electric Impedance</subject><subject>Electric properties</subject><subject>Endocrinology</subject><subject>head</subject><subject>Head &amp; neck cancer</subject><subject>Head and Neck Neoplasms - metabolism</subject><subject>Head and Neck Neoplasms - physiopathology</subject><subject>height</subject><subject>Hemodialysis</subject><subject>Hemodynamics</subject><subject>Humans</subject><subject>Impedance</subject><subject>Informed consent</subject><subject>Laryngeal cancer</subject><subject>Male</subject><subject>Medical prognosis</subject><subject>Medical sciences</subject><subject>men</subject><subject>Metabolic diseases</subject><subject>Middle Aged</subject><subject>muscle tissues</subject><subject>neck</subject><subject>neoplasms</subject><subject>Nutrition</subject><subject>Original Paper</subject><subject>Otorhinolaryngology (head neck, general aspects and miscellaneous)</subject><subject>Otorhinolaryngology. 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The phase angle is easy to obtain. The aim of our study was to investigate in a case-control study the utility of phase angle and other impedance parameters in a population of male patients with head and neck cancer. Material and Methods: A case-control study was designed. A population of 67 ambulatory post-surgical male patients was enrolled with the following inclusion criteria: oral and/or laryngeal cancer confirmed by biopsy, without a recent loss weight (<5% during previous 3 months) and signed informed consent. As reference group, we selected 70 male subjects from the same geographic region and matched by age, which were selected from a database of healthy people of our hospital. Basal blood sampling was performed for determinations of blood chemistry. Weight, height, body mass index and tetrapolar body electrical bioimpedance were performed in both groups. Results: A total of 67 head and neck cancer male patients were enrolled, mean age was 58.49 +/- 14.54 years, weight 73.32 +/- 11.4 kg and BMI 28.53 +/- 3.5. A total of 70 controls subjects were studied, mean age was 62.33 +/- 12.4 years. Weight 64.31 +/- 8.38 kg and BMI 24.33 +/- 3.2 were significantly lower than in cancer patients (p < 0.05). Renal function and blood sodium levels were similar in both groups. Anthropometric evaluation in cancer patients showed a mean fat mass lower than control patients (13.9 +/- 6.1 vs. 12.1 +/- 6.1 kg; p < 0.05). In control patients, fat-free mass was higher than in cancer patients (58.7 +/- 8.2 vs. 51.23 +/- 8.4 kg; p < 0.05). In cancer patients, reactance (62.3 +/- 17.2 vs. 56.6 +/- 15.1 ohm; p < 0.05) and phase angle (8.02 +/- 1.3 vs. 6.9 +/- 1.5 degrees ; p < 0.05) were lower than in control patients. Conclusion: Impedance in male head and neck cancer patients were characterized by a reduced reactance and phase angle. These early altered tissue electric properties appeared with a normal weight and body mass index.]]></abstract><cop>Basel, Switzerland</cop><pub>S. Karger AG</pub><pmid>16272813</pmid><doi>10.1159/000089484</doi><tpages>4</tpages></addata></record>
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subjects Adipose Tissue - metabolism
bioelectrical impedance
Biological and medical sciences
Biopsy
Blood
blood chemistry
Body Composition - physiology
Body Constitution
Body Height - physiology
Body Mass Index
Body Weight - physiology
Case studies
Case-Control Studies
Creatinine
Electric Conductivity
Electric Impedance
Electric properties
Endocrinology
head
Head & neck cancer
Head and Neck Neoplasms - metabolism
Head and Neck Neoplasms - physiopathology
height
Hemodialysis
Hemodynamics
Humans
Impedance
Informed consent
Laryngeal cancer
Male
Medical prognosis
Medical sciences
men
Metabolic diseases
Middle Aged
muscle tissues
neck
neoplasms
Nutrition
Original Paper
Otorhinolaryngology (head neck, general aspects and miscellaneous)
Otorhinolaryngology. Stomatology
Patients
phase angle alpha
Prognosis
Renal function
Scandals
Tumors
weight
title Tissue electric properties in head and neck cancer patients
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