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Dive into the research topics where Noriko Nishizawa is active.

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Featured researches published by Noriko Nishizawa.


Archives of Otolaryngology-head & Neck Surgery | 2009

Voice-Related Quality of Life After Treatment of Laryngeal Cancer

Nobuhiko Oridate; Akihiro Homma; Seigo Suzuki; Yuji Nakamaru; Fumiyuki Suzuki; Hiromitsu Hatakeyama; Shigenari Taki; Tomohiro Sakashita; Noriko Nishizawa; Yasushi Furuta; Satoshi Fukuda

OBJECTIVE To determine patient-perceived voice-related quality of life in patients treated with various methods based on the results of Voice-Related Quality of Life (VRQOL) and Voice Handicap Index-10 (VHI-10) questionnaires. DESIGN The VRQOL and VHI-10 questionnaires. SETTING University hospital. PATIENTS One hundred thirty-seven patients who had received definitive treatment of laryngeal cancer were followed-up at Hokkaido University Hospital, Sapporo, Japan, and were alive with no evidence of malignancy at the time of the survey. MAIN OUTCOME MEASURE Patient-perceived voice-related quality of life based on the results of the VRQOL and VHI-10 questionnaires. RESULTS The mean VRQOL scores for patients who had undergone radiotherapy (n = 63), chemoradiotherapy (n = 29), laser surgery (n = 14), or total laryngectomy (n = 27) as final treatment of laryngeal cancer were 92.6, 92.9, 85.5, and 68.4, respectively; the mean VHI-10 scores were 2.87, 2.34, 5.43, and 11.26, respectively. CONCLUSION The VRQOL and VHI-10 questionnaires are important in judging the overall effectiveness of treatment options for laryngeal cancer.


American Journal of Medical Genetics | 2000

Inner ear abnormalities in Kabuki make-up syndrome : Report of three cases

Hiroharu Igawa; Noriko Nishizawa; Tsuneki Sugihara; Yukio Inuyama

Three patients, a female and two males, 28, 15, and 14 years of age, with Kabuki make-up syndrome (KMS) were studied for middle and inner ear abnormalities by using CT scanning of the petrous bones. All three patients had bilateral dysplasia of the inner ear, i.e., hypodysplasia of the cochlea, vestibule, and semicircular canals (so-called Mondini dysplasia), whereas their middle ears had no abnormalities. Audiometry demonstrated a sharp decrease in hearing of the high tone range, bilateral in one and unilateral in another, while the third patient was noncooperative. In view of these findings, it would be advisable to study each individual with KMS and hearing impairment for possible inner ear abnormalities.


Laryngoscope | 2006

Helicobacter pylori seropositivity predicts outcomes of acid suppression therapy for laryngopharyngeal reflux symptoms.

Nobuhiko Oridate; Hiroshi Takeda; Junji Yamamoto; Masahiro Asaka; Yasushi Mesuda; Noriko Nishizawa; Mika Mori; Yasushi Furuta; Satoshi Fukuda

Objectives: Although an inverse relationship has been reported between the rates of reflux esophagitis and Helicobacter pylori infection in Japan, infection rates among patients complaining of laryngopharyngeal reflux symptoms, such as abnormal laryngopharyngeal sensation, chronic coughing, and hoarseness, have not previously been investigated. The effects of H. pylori infection on outcomes of acid suppression therapy have not been studied.


Journal of Gastroenterology | 2008

Evaluation of upper abdominal symptoms using the Frequency Scale for the Symptoms of Gastroesophageal Reflux Disease in patients with laryngopharyngeal reflux symptoms

Nobuhiko Oridate; Hiroshi Takeda; Yasushi Mesuda; Noriko Nishizawa; Yasushi Furuta; Masahiro Asaka; Satoshi Fukuda

BackgroundThe purpose of the study was to evaluate upper abdominal symptoms in laryngopharyngeal reflux (LPR) patients and changes in both upper abdominal and LPR symptoms before and after acid-suppression therapy.MethodsIn 100 patients with LPR symptoms, upper abdominal and LPR symptoms were evaluated by using the Frequency Scale for the Symptoms of Gastroesophageal Reflux Disease (FSSG) and the LPR symptom scoring system, respectively. In the 52 assessable patients, changes in these symptoms before and after acid-suppression therapy were evaluated.ResultsUpper abdominal symptoms were reported by 96/100 LPR patients: 89 responded positively to at least one of the questions about acid reflux-related symptoms and 89 to at least one of those about dysmotility-like symptoms. There was poor correlation between positive rates to FSSG upper abdominal symptom questions and the frequency of reported laryngopharyngeal symptoms. There were significant reductions in the frequency of acid reflux-related symptoms, dysmotility-like symptoms, and laryngopharyngeal symptoms after acidsuppression therapy. The LPR symptom score decreased to less than half the pretreatment score in 25 subjects (therapeutic response group). The pretreatment frequency of dysmotility-like symptoms seemed to be higher in the nonresponse group than in the response group, although the difference was not significant. There was no significant difference between the two groups in the pretreatment frequency of acid reflux-related symptoms.ConclusionsThe majority of these Japanese LPR patients experienced some form of upper abdominal symptoms. The frequency of dysmotility-like symptoms was similar to that of acid reflux-related symptoms. The pretreatment frequency of dysmotility-like symptoms, but not of acid reflux-related symptoms, might be a predictor of patient response to acid-suppression therapy.


Otolaryngology-Head and Neck Surgery | 2007

Velopharyngeal insufficiency in hemifacial microsomia: Analysis of correlated factors

Emi Funayama; Hiroharu H. Igawa; Noriko Nishizawa; Akihiko Oyama; Yuhei Yamamoto

OBJECTIVE: To investigate the incidence of unilateral hypodynamic palate (UHP) and velopharyngeal insufficiency (VPI) in hemifacial microsomia (HFM), and to determine the dysmorphic manifestations having significant associations with UHP/VPI in HFM. STUDY DESIGN: This was a nonrandomized study of 48 patients with unilateral HFM without cleft palate. The correlation between each anomaly and UHP/VPI was analyzed statistically. In addition, we observed 4 HFM patients with cleft palate to examine the influence on cleft palate speech. RESULTS: The incidence of UHP in HFM was 50.0% and that of VPI was 14.6%. All the VPI patients had UHP. Severe micrognathia and soft tissue deficiency, macrostomia, and mental retardation were significant risk factors for developing VPI in HFM. Moreover, UHP exacerbated speech in HFM with cleft lip and palate. CONCLUSIONS: Significant correlations were detected between VPI and HFM. This finding should be helpful in the overall management of HFM.


Plastic and Reconstructive Surgery | 1998

A fiberscopic analysis of velopharyngeal movement before and after primary palatoplasty in cleft palate infants

Hiroharu H. Igawa; Noriko Nishizawa; Tsuneki Sugihara; Yukio Inuyama

&NA; There have been few studies done on the abnormal function of velopharyngeal muscles in unrepaired cleft palate infants. To examine and assess velopharyngeal movement before primary palatoplasty offers supposedly any valuable information for the successful operation and the restoration of excellent velopharyngeal function. We designed to investigate and analyze velopharyngeal movement before and after primary palatoplasty in 26 cleft palate infants with a fine nasopharyngeal fiberscope. We found three different patterns of velopharyngeal movement in unrepaired cleft palate infants when crying or strangulation reflex occurred: (1) posterior movement type (10 cases, 38.5 percent), where the soft palates moved only posteriorly and cephalically and did not move medially; (2) medial movement type (10 cases, 38.5 percent), where the soft palates moved only medially and did not move posteriorly or cephalically; and (3) posteromedial movement type (6 cases, 23.0 percent), where the soft palates moved both posteriorly and cephalically as well as medially. Postoperative velopharyngeal closure was classified into three patterns: (1) the soft palate type, in which the soft palate mainly operates; (2) the lateral wall type, in which compensational medial movement of the lateral pharyngeal wall is mainly observed; and (3) the mixed type, in which both the soft palate and the lateral pharyngeal wall operate. Also, we demonstrated a close relationship between velopharyngeal movement before and after primary palatoplasty in cleft palate infants. In total, 10 of 16 cleft palate infants with the posterior movement type or posteromedial movement type, in which posterior movement of the soft palates was observed before primary palatoplasty, postoperatively showed the soft palate type of velopharyngeal closure. On the other hand, only 2 of 10 cleft palate infants with the medial movement type, in which the soft palates did not move posteriorly but medially before primary palatoplasty, postoperatively showed the soft palate type of velopharyngeal closure. The Fishers exact probability test clarified that cleft palate infants with the posterior movement type or posteromedial movement type were more likely to show postoperatively the soft palate type of the velopharyngeal closure compared with those with the medial movement type (p = 0.051). This is the first trial to examine velopharyngeal movement in unrepaired cleft palate infants. Our Findings indicate the probability that velopharyngeal closure mechanism in repaired cleft palate infants is able to be predicted by velopharyngeal movement behavior before primary palatoplasty. Next, we must clarify a correlation between preoperative velopharyngeal movement and postoperative velopharyngeal function and speech outcome. (Plast. Reconstr. Surg. 102: 668, 1998.)


Auris Nasus Larynx | 2001

Identification of the opener and closer of the pharyngoesophagus in laryngectomees.

Noriko Nishizawa; Yasushi Mesuda; Mamiko Kobashi; Makoto Takahashi; Yukio Inuyama

BACKGROUND In esophageal and tracheoesophageal speakers, the neoglottis acts not only as the orifice of the digestive tract but also as the airway and the voice source. The opening and closing mechanism is thought to be essential for these functions. It is not known, however, whether there is any active muscular control of neoglottal opening and closing. Examinations have been carried out to find the physiological background of the opening and closing of the neoglottis. In this paper, we present our findings of the opening and closing mechanism of the neoglottis and discuss them with reviewing the previous studies. SUBJECTS AND METHODS Subjects were volunteer esophageal speakers. Neoglottal width, EMG of the inferior pharyngeal constrictor (IPC) and that of the geniohyoid muscle (GH) were recorded simultaneously during swallowing and air intake for esophageal speech. RESULTS At rest, the neoglottis was closed by the mucosal protrusion in the posterior wall of the pharyngoesophagus. During swallowing, the neoglottis was widely opened. Traction of the anterior pharyngeal wall anteriorly by the GH and reciprocal suppression of the IPC activity was thought to be the mechanism of the neoglottal opening in this case. However, such simple reciprocity was not observed during air intake, although transient opening of the neoglottis was commonly observed. The GH showed increased activity at neoglottal opening as it did during swallowing. The IPC was. on the other hand, continuously activated, and no significant suppression was observed. During air intake, the muscle is assumed to play a role in maintaining the shape and tension of the posterior mucosal protrusion which acts as a voice source in subsequent phonation. CONCLUSIONS The GH and the IPC were found to open and close the neoglottis, respectively. Their activities were not always clearly reciprocal in the various functions of the neoglottis.


Auris Nasus Larynx | 1993

Thyroplasty Type I with Ceramic Shim

Noboru Sakai; Yasushi Furuta; Noriko Nishizawa; Kenichi Koichi; Toshiya Suganuma; Eiji Chida; Yoshihiro Dousaka; Hideo Kurihara; Junichi Matsushima; Yukio Inuyama

To prevent side effects from a silicone shim in Isshiki thyroplasty type I, we used a ceramic shim in 10 patients with unilateral recurrent laryngeal nerve paralysis. No published reports have described the use of ceramic in this type of surgery. According to the degree of glottic insufficiency, ceramic shims of various heights were inserted into the fenestration made in the thyroid ala. All patients experienced subjective improvement of voice postoperatively. Laryngoscopies in most cases showed that glottic insufficiency improved postoperatively. In the postoperative examination, the maximum phonation time improved an average of 3.7 s, and the mean flow rate improved an average of 331 ml/s. We have analyzed the relationship of these improvements to the degree of glottic insufficiency and have compared our results with those of other investigators.


International Journal of Pediatric Otorhinolaryngology | 2014

Important points for primary cleft palate repair for speech derived from speech outcome after three different types of palatoplasty

Emi Funayama; Yuhei Yamamoto; Noriko Nishizawa; Tadashi Mikoya; Toru Okamoto; Satoko Imai; Naoki Murao; Hiroshi Furukawa; Toshihiko Hayashi; Akihiko Oyama

OBJECTIVE This study was performed to investigate speech outcomes after three different types of palatoplasty for the same cleft type. The objective of this study was to investigate the surgical techniques that are essential for normal speech on the basis of each surgical characteristic. METHODS Thirty-eight consecutive nonsyndromic patients with unilateral complete cleft of the lip, alveolus, and palate were enrolled in this study. Speech outcomes, i.e., nasal emission, velopharyngeal insufficiency, and malarticulation after one-stage pushback (PB), one-stage modified Furlow (MF), or conventional two-stage MF palatoplasty, were evaluated at 4 (before intensive speech therapy) and 8 (after closure of oronasal fistula/unclosed hard palate) years of age. RESULTS Velopharyngeal insufficiency at 4 (and 8) years of age was present in 5.9% (0.0%), 0.0% (0.0%), and 10.0% (10.0%) of patients who underwent one-stage PB, one-stage MF, or two-stage MF palatoplasty, respectively. No significant differences in velopharyngeal function were found among these three groups at 4 and 8 years of age. Malarticulation at 4 years of age was found in 35.3%, 10.0%, and 63.6% of patients who underwent one-stage PB, one-stage MF, and two-stage MF palatoplasty, respectively. Malarticulation at 4 years of age was significantly related to the presence of a fistula/unclosed hard palate (P<0.01). One-stage MF palatoplasty that was not associated with postoperative oronasal fistula (ONF) showed significantly better results than two-stage MF (P<0.01). Although the incidences of malarticulation at 8 years of age were decreased in each group compared to at 4 years of age, the incidence was still high in patients treated with two-stage MF (45.5%). On the whole, there was a significant correlation between ONF/unclosed hard palate at 4 years of age and malarticulation at 8 years of age (P<0.05). CONCLUSION Appropriate muscle sling formation can compensate for a lack of retropositioning of the palate for adequate velopharyngeal closure. Early closure of the whole palate and the absence of a palatal fistula were confirmed to be essential for normal speech. To avoid fistula formation, multilayer repair of the whole palate may be critical.


Journal of Voice | 2017

Reliability and Validity of Speech Evaluation in Adductor Spasmodic Dysphonia

Saori Yanagida; Noriko Nishizawa; Ryusaku Hashimoto; Kenji Mizoguchi; Hiromitsu Hatakeyama; Akihiro Homma; Satoshi Fukuda

OBJECTIVES The aim of this study was to evaluate speech in patients with adductor spasmodic dysphonia (ADSD) by perceptual evaluations and acoustic measures, and to examine the reliability and validity of these measures. METHODS Twenty-four patients with ADSD and 24 healthy volunteers were included in the study. Speech materials consisted of three sentences constructed from serial voiced syllables to elicit abductor voice breaks. Three otolaryngologists rated the degree of voice symptoms using a visual analog scale (VAS). VAS sheets with five 100-mm horizontal lines were given to each rater. The ends of the lines were labeled normal vs severe, and the five lines were labeled as overall severity of each of the four speech symptoms (strangulation, interruption, tremor and strained speech). Nine words were selected for acoustic analysis, and abnormal acoustic events were classified into one of the three categories. To evaluate the intra- and inter-rater and intermeasurer reliabilities of the VAS scores or acoustic measures, Pearson r correlations were calculated. To examine the validity of perceptual evaluations and acoustic measures, the sensitivity and the specificity were calculated. RESULTS Pearson r correlation coefficients for overall severity showed the highest intra- and inter-rater reliabilities. For acoustic events, the intrameasurer reliabilities were r = .645 (frequency shifts), r = .969 (aperiodic segments), and r = 1.0 (phonation breaks), and the intermeasurer reliability ranged from r = .102 to r = 1.0. Perceptual evaluation showed high sensitivity (91.7%) and specificity (100%), whereas acoustic analysis showed low sensitivity (70.8%) and high specificity (100%). CONCLUSION Both perceptual evaluation and acoustic measures alone were found likely to overlook patients with true ADSD.

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