Stamatia Vlachou - Academia.edu (original) (raw)

Papers by Stamatia Vlachou

Journal of Laryngology and Otology, Aug 1, 2001

A rare case of ossifying broma of the temporal bone is presented. Fibro-osseous lesions are benig... more A rare case of ossifying broma of the temporal bone is presented. Fibro-osseous lesions are benign neoplasms but may show an aggressive behaviour when invading important anatomical structures. The lack of experience in the treatment of those tumours is re ected in the small relative literature. The purpose of this paper is to contribute to the few cases already reported.

ORL, 1999

Multiple-frequency tympanometry (MFT) and conventional 226-Hz tympanometry were performed in 86 e... more Multiple-frequency tympanometry (MFT) and conventional 226-Hz tympanometry were performed in 86 ears of children affected by acute otitis media (AOM) after therapy. In a 3-month follow-up period, the recurrence rate of AOM and persistence of middle-ear effusion in these children were evaluated in comparison with the early results of the two methods, as well as the relation of MFT findings to the possibility of development of AOM sequelae. It seems that abnormal resonant frequency values and recordings by MFT right after an episode of AOM indicate persistence of changes in the mass and stiffness balance of the middle ear, not demonstrated by conventional tympanometry, that could be responsible for a higher probability of AOM sequelae.

Otolaryngology-Head and Neck Surgery, Dec 1, 1999

Multiple-frequency tympanometry (MFT) is a sweep-frequency method of acoustic immittance measurem... more Multiple-frequency tympanometry (MFT) is a sweep-frequency method of acoustic immittance measurement, recently introduced in clinical practice. It provides values for the resonant frequency of the middle ear system. The purpose of this study was to use MFT to collect information about the mechanoacoustical changes occurring to the middle ear system after acute otitis media and to compare it with the results of conventional, low probe-tone tympanometry. Children with acute otitis media were followed up with both methods for 1 month after an episode of acute infection. Also, children with normal hearing were studied to establish normative data. Resonant frequency of the middle ear was found to be lower than normal even 1 month past the initial episode, for all types of 226-Hz tympanograms. MFT seemed to record changes in the middle ear after acute otitis media that 226-Hz tympanometry was unable to detect, implying persistence of pathology. More extended research will illuminate the clinical value of this method in the follow-up of acute otitis media.

Scandinavian Audiology, 2001

ABSTRACT Middle ear mechanics, in normal and in pathological conditions, is the subject of this r... more ABSTRACT Middle ear mechanics, in normal and in pathological conditions, is the subject of this research, with acoustic impedance measurements as the cornerstone. Previous studies have established the importance of admittance-phase tympanograms, mainly in frequencies higher than the conventional 226 Hz. The purpose of the present study was to record how acute otitis media (AOM) affects the middle ear system and function by evaluating the recordings of the change in phase angle parameter (deltatheta) provided by an automated tympanometer using the sweep-frequency technique. Multifrequency and conventional tympanograms were obtained from 70 children suffering from AOM on consecutive visits. Values of deltatheta from these subjects were compared to normative data previously acquired in our Department. It appears that changes in the mechanical status of the middle ear after AOM are reflected in abnormal deltatheta values, despite the normal findings of conventional tympanometry. A positive history of AOM did not seem to influence the behaviour of the middle ear. In most cases, abnormal deltatheta values coexisted with abnormal values of resonance frequency (RF), i.e. the frequency at which mass and stiffness of the middle ear are in balance, and total susceptance (deltaB) reaches 0mmhos and the converse. The deltatheta seems to be an important indicator of middle ear mechanical status that can record changes occurring in the system after AOM and undetected by low probe-tone tympanometry.

PubMed, Oct 28, 2005

The aim of this paper was to present our experience with a universal newborn hearing screening pr... more The aim of this paper was to present our experience with a universal newborn hearing screening program, including the specific problems and difficulties faced since its beginning, along with the measures used to overcome them and to improve its efficiency. We analyzed data from 22,195 newborns screened by transiently evoked otoacoustic emissions (TEOAE) performed during the first days after birth. 84.8% of the newborns passed on the first test and another 12.15% passed on rescreening before hospital discharge. This produced a "not pass" rate (false-positive and true positive) of 3.05%. The rate of newborns who did not undergo screening and the rate of "lost to follow-up" newborns were reduced in time, due to various applied modifications to the protocol. It may be thus concluded that our protocol proved to be successful in attaining low refer rates for follow-up screening. A major problem that remains unresolved is the absence of effective follow-up.

Turkish Journal of Pediatrics

The aim of this paper was to present our experience with a universal newborn hearing screening pr... more The aim of this paper was to present our experience with a universal newborn hearing screening program, including the specific problems and difficulties faced since its beginning, along with the measures used to overcome them and to improve its efficiency. We analyzed data from 22,195 newborns screened by transiently evoked otoacoustic emissions (TEOAE) performed during the first days after birth. 84.8% of the newborns passed on the first test and another 12.15% passed on rescreening before hospital discharge. This produced a "not pass" rate (false-positive and true positive) of 3.05%. The rate of newborns who did not undergo screening and the rate of "lost to follow-up" newborns were reduced in time, due to various applied modifications to the protocol. It may be thus concluded that our protocol proved to be successful in attaining low refer rates for follow-up screening. A major problem that remains unresolved is the absence of effective follow-up.

Rhinology, 2002

The inverted papilloma of the nose and paranasal sinuses is a controversial disease. It invades s... more The inverted papilloma of the nose and paranasal sinuses is a controversial disease. It invades surrounded structures, shows a high recurrence rate after surgical excision and may coexist with squamous cell carcinoma. The use of the optimal surgical approach and technique is of the utmost importance, as it is related to the possibility of recurrence. In cases of tumors of limited size a conservative local excision is sufficient, while, in larger tumors filling the nasal cavity and the paranasal sinuses a more aggressive strategy is needed, such as a medial maxillectomy after lateral rhinotomy. In this paper we present our experience from treating 42 sinonasal inverted papillomas, using a surgical technique which is based on the conservation of as much part of the healthy lateral nasal wall as possible. This modified medial maxillectomy allows us to create a limited in size and normally functioning nasal cavity, thus minimizing the disadvantages of the classical medial maxillectomy w...

The inverted papilloma of the nose and paranasal sinuses is a controversial disease. It invades s... more The inverted papilloma of the nose and paranasal sinuses is a controversial disease. It invades surrounded structures, shows a high recurrence rate after surgical excision and may coexist with squamous cell carcinoma. The use of the optimal surgical approach and technique is of the utmost importance, as it is related to the possibility of recurrence. In cases of tumors of limited size a conservative local excision is sufficient, while, in larger tumors filling the nasal cavity and the paranasal sinuses a more aggressive strategy is needed, such as a medial maxillectomy after lateral rhinotomy. In this paper we present our experience from treating 42 sinonasal inverted papillomas, using a surgical technique which is based on the conservation of as much part of the healthy lateral nasal wall as possible. This modified medial maxillectomy allows us to create a limited in size and normally functioning nasal cavity, thus minimizing the disadvantages of the classical medial maxillectomy w...

The aim of this paper was to present our experience with a universal newborn hearing screening pr... more The aim of this paper was to present our experience with a universal newborn hearing screening program, including the specific problems and difficulties faced since its beginning, along with the measures used to overcome them and to improve its efficiency. We analyzed data from 22,195 newborns screened by transiently evoked otoacoustic emissions (TEOAE) performed during the first days after birth. 84.8% of the newborns passed on the first test and another 12.15% passed on rescreening before hospital discharge. This produced a "not pass" rate (false-positive and true positive) of 3.05%. The rate of newborns who did not undergo screening and the rate of "lost to follow-up" newborns were reduced in time, due to various applied modifications to the protocol. It may be thus concluded that our protocol proved to be successful in attaining low refer rates for follow-up screening. A major problem that remains unresolved is the absence of effective follow-up.

The Turkish journal of pediatrics

The aim of this paper was to present our experience with a universal newborn hearing screening pr... more The aim of this paper was to present our experience with a universal newborn hearing screening program, including the specific problems and difficulties faced since its beginning, along with the measures used to overcome them and to improve its efficiency. We analyzed data from 22,195 newborns screened by transiently evoked otoacoustic emissions (TEOAE) performed during the first days after birth. 84.8% of the newborns passed on the first test and another 12.15% passed on rescreening before hospital discharge. This produced a "not pass" rate (false-positive and true positive) of 3.05%. The rate of newborns who did not undergo screening and the rate of "lost to follow-up" newborns were reduced in time, due to various applied modifications to the protocol. It may be thus concluded that our protocol proved to be successful in attaining low refer rates for follow-up screening. A major problem that remains unresolved is the absence of effective follow-up.

International Journal of Oral and Maxillofacial Surgery, 2009

Scandinavian Audiology, 2001

ABSTRACT Middle ear mechanics, in normal and in pathological conditions, is the subject of this r... more ABSTRACT Middle ear mechanics, in normal and in pathological conditions, is the subject of this research, with acoustic impedance measurements as the cornerstone. Previous studies have established the importance of admittance-phase tympanograms, mainly in frequencies higher than the conventional 226 Hz. The purpose of the present study was to record how acute otitis media (AOM) affects the middle ear system and function by evaluating the recordings of the change in phase angle parameter (deltatheta) provided by an automated tympanometer using the sweep-frequency technique. Multifrequency and conventional tympanograms were obtained from 70 children suffering from AOM on consecutive visits. Values of deltatheta from these subjects were compared to normative data previously acquired in our Department. It appears that changes in the mechanical status of the middle ear after AOM are reflected in abnormal deltatheta values, despite the normal findings of conventional tympanometry. A positive history of AOM did not seem to influence the behaviour of the middle ear. In most cases, abnormal deltatheta values coexisted with abnormal values of resonance frequency (RF), i.e. the frequency at which mass and stiffness of the middle ear are in balance, and total susceptance (deltaB) reaches 0mmhos and the converse. The deltatheta seems to be an important indicator of middle ear mechanical status that can record changes occurring in the system after AOM and undetected by low probe-tone tympanometry.

ORL, 1999

Multiple-frequency tympanometry (MFT) and conventional 226-Hz tympanometry were performed in 86 e... more Multiple-frequency tympanometry (MFT) and conventional 226-Hz tympanometry were performed in 86 ears of children affected by acute otitis media (AOM) after therapy. In a 3-month follow-up period, the recurrence rate of AOM and persistence of middle-ear effusion in these children were evaluated in comparison with the early results of the two methods, as well as the relation of MFT findings to the possibility of development of AOM sequelae. It seems that abnormal resonant frequency values and recordings by MFT right after an episode of AOM indicate persistence of changes in the mass and stiffness balance of the middle ear, not demonstrated by conventional tympanometry, that could be responsible for a higher probability of AOM sequelae.

Otolaryngology - Head and Neck Surgery, 1999

Multiple-frequency tympanometry (MFT) is a sweep-frequency method of acoustic immittance measurem... more Multiple-frequency tympanometry (MFT) is a sweep-frequency method of acoustic immittance measurement, recently introduced in clinical practice. It provides values for the resonant frequency of the middle ear system. The purpose of this study was to use MFT to collect information about the mechanoacoustical changes occurring to the middle ear system after acute otitis media and to compare it with the results of conventional, low probe-tone tympanometry. Children with acute otitis media were followed up with both methods for 1 month after an episode of acute infection. Also, children with normal hearing were studied to establish normative data. Resonant frequency of the middle ear was found to be lower than normal even 1 month past the initial episode, for all types of 226-Hz tympanograms. MFT seemed to record changes in the middle ear after acute otitis media that 226-Hz tympanometry was unable to detect, implying persistence of pathology. More extended research will illuminate the clinical value of this method in the follow-up of acute otitis media.

American Journal of Otolaryngology, 2000

The Journal of Laryngology & Otology, 2000

Ectopic thymic tissue in the neck is rarely reported in medical literature. This paper presents t... more Ectopic thymic tissue in the neck is rarely reported in medical literature. This paper presents the case of a young female, who presented with a soft, fluctuating mass in the left side of her neck. Surgical excision revealed an ectopic thymic cyst. Ectopic thymic tissue may be an infrequent finding, but it should be included in the differential diagnosis of neck masses, especially in children. This case report is accompanied by a short review of the relative literature.

Journal of Laryngology and Otology, Aug 1, 2001

A rare case of ossifying broma of the temporal bone is presented. Fibro-osseous lesions are benig... more A rare case of ossifying broma of the temporal bone is presented. Fibro-osseous lesions are benign neoplasms but may show an aggressive behaviour when invading important anatomical structures. The lack of experience in the treatment of those tumours is re ected in the small relative literature. The purpose of this paper is to contribute to the few cases already reported.

ORL, 1999

Multiple-frequency tympanometry (MFT) and conventional 226-Hz tympanometry were performed in 86 e... more Multiple-frequency tympanometry (MFT) and conventional 226-Hz tympanometry were performed in 86 ears of children affected by acute otitis media (AOM) after therapy. In a 3-month follow-up period, the recurrence rate of AOM and persistence of middle-ear effusion in these children were evaluated in comparison with the early results of the two methods, as well as the relation of MFT findings to the possibility of development of AOM sequelae. It seems that abnormal resonant frequency values and recordings by MFT right after an episode of AOM indicate persistence of changes in the mass and stiffness balance of the middle ear, not demonstrated by conventional tympanometry, that could be responsible for a higher probability of AOM sequelae.

Otolaryngology-Head and Neck Surgery, Dec 1, 1999

Multiple-frequency tympanometry (MFT) is a sweep-frequency method of acoustic immittance measurem... more Multiple-frequency tympanometry (MFT) is a sweep-frequency method of acoustic immittance measurement, recently introduced in clinical practice. It provides values for the resonant frequency of the middle ear system. The purpose of this study was to use MFT to collect information about the mechanoacoustical changes occurring to the middle ear system after acute otitis media and to compare it with the results of conventional, low probe-tone tympanometry. Children with acute otitis media were followed up with both methods for 1 month after an episode of acute infection. Also, children with normal hearing were studied to establish normative data. Resonant frequency of the middle ear was found to be lower than normal even 1 month past the initial episode, for all types of 226-Hz tympanograms. MFT seemed to record changes in the middle ear after acute otitis media that 226-Hz tympanometry was unable to detect, implying persistence of pathology. More extended research will illuminate the clinical value of this method in the follow-up of acute otitis media.

Scandinavian Audiology, 2001

ABSTRACT Middle ear mechanics, in normal and in pathological conditions, is the subject of this r... more ABSTRACT Middle ear mechanics, in normal and in pathological conditions, is the subject of this research, with acoustic impedance measurements as the cornerstone. Previous studies have established the importance of admittance-phase tympanograms, mainly in frequencies higher than the conventional 226 Hz. The purpose of the present study was to record how acute otitis media (AOM) affects the middle ear system and function by evaluating the recordings of the change in phase angle parameter (deltatheta) provided by an automated tympanometer using the sweep-frequency technique. Multifrequency and conventional tympanograms were obtained from 70 children suffering from AOM on consecutive visits. Values of deltatheta from these subjects were compared to normative data previously acquired in our Department. It appears that changes in the mechanical status of the middle ear after AOM are reflected in abnormal deltatheta values, despite the normal findings of conventional tympanometry. A positive history of AOM did not seem to influence the behaviour of the middle ear. In most cases, abnormal deltatheta values coexisted with abnormal values of resonance frequency (RF), i.e. the frequency at which mass and stiffness of the middle ear are in balance, and total susceptance (deltaB) reaches 0mmhos and the converse. The deltatheta seems to be an important indicator of middle ear mechanical status that can record changes occurring in the system after AOM and undetected by low probe-tone tympanometry.

PubMed, Oct 28, 2005

The aim of this paper was to present our experience with a universal newborn hearing screening pr... more The aim of this paper was to present our experience with a universal newborn hearing screening program, including the specific problems and difficulties faced since its beginning, along with the measures used to overcome them and to improve its efficiency. We analyzed data from 22,195 newborns screened by transiently evoked otoacoustic emissions (TEOAE) performed during the first days after birth. 84.8% of the newborns passed on the first test and another 12.15% passed on rescreening before hospital discharge. This produced a "not pass" rate (false-positive and true positive) of 3.05%. The rate of newborns who did not undergo screening and the rate of "lost to follow-up" newborns were reduced in time, due to various applied modifications to the protocol. It may be thus concluded that our protocol proved to be successful in attaining low refer rates for follow-up screening. A major problem that remains unresolved is the absence of effective follow-up.

Turkish Journal of Pediatrics

The aim of this paper was to present our experience with a universal newborn hearing screening pr... more The aim of this paper was to present our experience with a universal newborn hearing screening program, including the specific problems and difficulties faced since its beginning, along with the measures used to overcome them and to improve its efficiency. We analyzed data from 22,195 newborns screened by transiently evoked otoacoustic emissions (TEOAE) performed during the first days after birth. 84.8% of the newborns passed on the first test and another 12.15% passed on rescreening before hospital discharge. This produced a "not pass" rate (false-positive and true positive) of 3.05%. The rate of newborns who did not undergo screening and the rate of "lost to follow-up" newborns were reduced in time, due to various applied modifications to the protocol. It may be thus concluded that our protocol proved to be successful in attaining low refer rates for follow-up screening. A major problem that remains unresolved is the absence of effective follow-up.

Rhinology, 2002

The inverted papilloma of the nose and paranasal sinuses is a controversial disease. It invades s... more The inverted papilloma of the nose and paranasal sinuses is a controversial disease. It invades surrounded structures, shows a high recurrence rate after surgical excision and may coexist with squamous cell carcinoma. The use of the optimal surgical approach and technique is of the utmost importance, as it is related to the possibility of recurrence. In cases of tumors of limited size a conservative local excision is sufficient, while, in larger tumors filling the nasal cavity and the paranasal sinuses a more aggressive strategy is needed, such as a medial maxillectomy after lateral rhinotomy. In this paper we present our experience from treating 42 sinonasal inverted papillomas, using a surgical technique which is based on the conservation of as much part of the healthy lateral nasal wall as possible. This modified medial maxillectomy allows us to create a limited in size and normally functioning nasal cavity, thus minimizing the disadvantages of the classical medial maxillectomy w...

The inverted papilloma of the nose and paranasal sinuses is a controversial disease. It invades s... more The inverted papilloma of the nose and paranasal sinuses is a controversial disease. It invades surrounded structures, shows a high recurrence rate after surgical excision and may coexist with squamous cell carcinoma. The use of the optimal surgical approach and technique is of the utmost importance, as it is related to the possibility of recurrence. In cases of tumors of limited size a conservative local excision is sufficient, while, in larger tumors filling the nasal cavity and the paranasal sinuses a more aggressive strategy is needed, such as a medial maxillectomy after lateral rhinotomy. In this paper we present our experience from treating 42 sinonasal inverted papillomas, using a surgical technique which is based on the conservation of as much part of the healthy lateral nasal wall as possible. This modified medial maxillectomy allows us to create a limited in size and normally functioning nasal cavity, thus minimizing the disadvantages of the classical medial maxillectomy w...

The aim of this paper was to present our experience with a universal newborn hearing screening pr... more The aim of this paper was to present our experience with a universal newborn hearing screening program, including the specific problems and difficulties faced since its beginning, along with the measures used to overcome them and to improve its efficiency. We analyzed data from 22,195 newborns screened by transiently evoked otoacoustic emissions (TEOAE) performed during the first days after birth. 84.8% of the newborns passed on the first test and another 12.15% passed on rescreening before hospital discharge. This produced a "not pass" rate (false-positive and true positive) of 3.05%. The rate of newborns who did not undergo screening and the rate of "lost to follow-up" newborns were reduced in time, due to various applied modifications to the protocol. It may be thus concluded that our protocol proved to be successful in attaining low refer rates for follow-up screening. A major problem that remains unresolved is the absence of effective follow-up.

The Turkish journal of pediatrics

The aim of this paper was to present our experience with a universal newborn hearing screening pr... more The aim of this paper was to present our experience with a universal newborn hearing screening program, including the specific problems and difficulties faced since its beginning, along with the measures used to overcome them and to improve its efficiency. We analyzed data from 22,195 newborns screened by transiently evoked otoacoustic emissions (TEOAE) performed during the first days after birth. 84.8% of the newborns passed on the first test and another 12.15% passed on rescreening before hospital discharge. This produced a "not pass" rate (false-positive and true positive) of 3.05%. The rate of newborns who did not undergo screening and the rate of "lost to follow-up" newborns were reduced in time, due to various applied modifications to the protocol. It may be thus concluded that our protocol proved to be successful in attaining low refer rates for follow-up screening. A major problem that remains unresolved is the absence of effective follow-up.

International Journal of Oral and Maxillofacial Surgery, 2009

Scandinavian Audiology, 2001

ABSTRACT Middle ear mechanics, in normal and in pathological conditions, is the subject of this r... more ABSTRACT Middle ear mechanics, in normal and in pathological conditions, is the subject of this research, with acoustic impedance measurements as the cornerstone. Previous studies have established the importance of admittance-phase tympanograms, mainly in frequencies higher than the conventional 226 Hz. The purpose of the present study was to record how acute otitis media (AOM) affects the middle ear system and function by evaluating the recordings of the change in phase angle parameter (deltatheta) provided by an automated tympanometer using the sweep-frequency technique. Multifrequency and conventional tympanograms were obtained from 70 children suffering from AOM on consecutive visits. Values of deltatheta from these subjects were compared to normative data previously acquired in our Department. It appears that changes in the mechanical status of the middle ear after AOM are reflected in abnormal deltatheta values, despite the normal findings of conventional tympanometry. A positive history of AOM did not seem to influence the behaviour of the middle ear. In most cases, abnormal deltatheta values coexisted with abnormal values of resonance frequency (RF), i.e. the frequency at which mass and stiffness of the middle ear are in balance, and total susceptance (deltaB) reaches 0mmhos and the converse. The deltatheta seems to be an important indicator of middle ear mechanical status that can record changes occurring in the system after AOM and undetected by low probe-tone tympanometry.

ORL, 1999

Multiple-frequency tympanometry (MFT) and conventional 226-Hz tympanometry were performed in 86 e... more Multiple-frequency tympanometry (MFT) and conventional 226-Hz tympanometry were performed in 86 ears of children affected by acute otitis media (AOM) after therapy. In a 3-month follow-up period, the recurrence rate of AOM and persistence of middle-ear effusion in these children were evaluated in comparison with the early results of the two methods, as well as the relation of MFT findings to the possibility of development of AOM sequelae. It seems that abnormal resonant frequency values and recordings by MFT right after an episode of AOM indicate persistence of changes in the mass and stiffness balance of the middle ear, not demonstrated by conventional tympanometry, that could be responsible for a higher probability of AOM sequelae.

Otolaryngology - Head and Neck Surgery, 1999

Multiple-frequency tympanometry (MFT) is a sweep-frequency method of acoustic immittance measurem... more Multiple-frequency tympanometry (MFT) is a sweep-frequency method of acoustic immittance measurement, recently introduced in clinical practice. It provides values for the resonant frequency of the middle ear system. The purpose of this study was to use MFT to collect information about the mechanoacoustical changes occurring to the middle ear system after acute otitis media and to compare it with the results of conventional, low probe-tone tympanometry. Children with acute otitis media were followed up with both methods for 1 month after an episode of acute infection. Also, children with normal hearing were studied to establish normative data. Resonant frequency of the middle ear was found to be lower than normal even 1 month past the initial episode, for all types of 226-Hz tympanograms. MFT seemed to record changes in the middle ear after acute otitis media that 226-Hz tympanometry was unable to detect, implying persistence of pathology. More extended research will illuminate the clinical value of this method in the follow-up of acute otitis media.

American Journal of Otolaryngology, 2000

The Journal of Laryngology & Otology, 2000

Ectopic thymic tissue in the neck is rarely reported in medical literature. This paper presents t... more Ectopic thymic tissue in the neck is rarely reported in medical literature. This paper presents the case of a young female, who presented with a soft, fluctuating mass in the left side of her neck. Surgical excision revealed an ectopic thymic cyst. Ectopic thymic tissue may be an infrequent finding, but it should be included in the differential diagnosis of neck masses, especially in children. This case report is accompanied by a short review of the relative literature.