Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid...

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Khalid M. Taibah , MBBch, FRCSc.ABOto. Professor ,Alfaisal University, Collage of Medicine Director of ENT Medical Center, Riyadh Founder of Saudi Society For Hearing Impairment (Saudi Hi) Former Head, Otolaryngology,Head &Neck surgery, KFSH&RC PAST, PRESENT AND FUTUER OF OTORHINOLARYNGOLOG AND HEAD&NECK SURGERY 1-2 December 2018

Transcript of Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid...

Page 1: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...

Khalid M. Taibah , MBBch, FRCSc.ABOto.

Professor ,Alfaisal University, Collage of Medicine

Director of ENT Medical Center, Riyadh

Founder of Saudi Society For Hearing Impairment (Saudi Hi)

Former Head, Otolaryngology,Head &Neck surgery, KFSH&RC

PAST, PRESENT AND FUTUER OF OTORHINOLARYNGOLOG AND HEAD&NECK SURGERY

1-2 December 2018

Page 2: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...

PAST, PRESENT AND FUTUER OF OTORHINOLARYNGOLOG AND HEAD&NECK SURGERY

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ANCIENT MEDICINE

EGYPTION 5000 ROMANGRECO - ROMAN INDIAN

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Pure air was implanted in the ear

EMPEDOCLLES ( c. 490-c.430)

(fire, air, earth and water),

Seeshell

Aristotle ( 384 B.C. to 322 B.C.)

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1-MEDICAL ETHEICS

2- HOSPITAL/ BIRIMISTAN

3-PHARMCY

4- WOMEN AND MEDICINE

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الزهراوىأبو القاسم

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1700 – 1800 - 1900

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Struycken ‘s instrument for Hearing 1950

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Otorhinolaryngologists :individual surgeons have subspecialised in:

1- Otology, cochlear implant surgery,

2- Otoneurosurgery and skull-base surgery,

3- Head and Neck surgery,

4- Laryngology and Phonosurgery,

5- Rhinology,

6- Facioplastic surgery

7- paediatric otorhinolaryngology

8- Sleep Medicine.

William House John J. Conley

William Montgomery Heinz Stemberger

Charles Bluestone Robin cotton

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100th Year Anniversary

Department of Otolaryngology, McGill University

2005

Dr. Jeremy with my

daughter, MaramNurse with my

son, Mahmoud

McGill University , Montreal, 1983-1987

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King Faisal Specialist Hospital &Research Centre

• Joined KFSH&RC 1988.

• Head and Neck oncology surgery.

• Paediatric and Adult Laryngeal reconstruction surgery.

• Otology and Neurotology.

• General Otorhinolarynglogy.

Page 14: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...

Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad

Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher

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KING FAISAL SPECIALIST HOSPITAL&RC

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Otology and Neurotology

• First Cochlear Implant Program in the Kingdom of Saudi Arabia started at KFSH&RC in 1993.

• National Program for Early Detection of congenital hearing loss at ( Saudi HI) 2001.

• First Bone Anchored Hearing Aid (BAHA) at KFSH&RC in 2006.

• Genetic study for Deaf Gene in Saudi Arabia population at KFSH&RC and

ENT Medical Centre 2009.

• Middle Ear Implant Partial and Total experience at ENT Medical Centre 2010.

• Future of Gene and stem cell therapy.

• Future Implantable devices for hearing and balance.

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:لفترةنتائج برنامج فحص السمع المبكر لألطفال حديثي الوالدة في ا

هـ30/12/1429هـ إلى 1/1/1429من -

الجمعية السعودية لإلعاقة السمعية

Saudi HI

Prof. Dr Seraj Zagzog Prof.Dr Khalid Taibah

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الجمعية السعودية لإلعاقة السمعية

Saudi HI

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:نتائج برنامج فحص السمع المبكر لألطفال حديثي الوالدة في الفترة

هـ30/12/1429هـ إلى 1/1/1429من -

:المقدمة*

-12إلى عمر علسمأثبتت الدراسات مدى أهمية برامج فحص السمع لألطفال حديثي الوالدة قبل خروجهم من المستشفى، فمن دون هذه البرامج قد يتأخر كشف ضعف ا.شهراً أو أكثر في بعض الحاالت36

الطبيعي ويترتب على في وقت متأخر تكون النتيجة تأخر ملحوظ في اللغة يصعب تحسينه إلى المستوى-لدى األطفال حديثي الوالدة-فعندما يتم اكتشاف ضعف السمع لديهم مبكراً حيث وهذا ليس بحال األطفال الذين يتم اكتشاف ضعف السمع, ذلك تأخرهم دراسيا ًكما سيعانون مستقبالًمن مشاكل تعليمية، ونفسية، وإجتماعية

.فنجدهم في مستوى لغوي ودراسي مساو ألقرانهم الذين ال يعانون من مشاكل سمعية, يحصلون على تدخل مبكر

:المستشفيات المشاركة في مدينة الرياض*

ممرضات متفرغات لبرنامج فحص السمع المبكر 4لديهم : مجمع الملك سعود الطبي-1

لديهم ممرضات متفرغات لبرنامج فحص السمع المبكر : مستشفى اليمامة-2

:إجراءات البرنامج*

نين أو كالهما في و في حال لم تنجح أحدى األذ, ينص برنامج فحص السمع المبكر لألطفال حديثي الوالدة على فحص كل طفل حديث الوالدة قبل خروجه من المستشفى-د أو متأخر أو في حال كان الطفل حديث الوالدة معرضاً لخطر إكتساب فقدان سمع متزاي-لثالث مرات متتالية يفصل بين كل فحص واآلخر شهر-الفحص

فل جذع الدماغ يتم تحويلهم لفحص أس-إلخ , سواء كان بسبب والدة مبكرة أو تناول أدوية تؤثر على السمع أو لدى عائلة الطفل تاريخ طبي في ضعف السمع(ABR )في فترة ال تتجاوز ثالثة أشهر من آخر فحص أولي.

. حيث يوجد أجهزة في كال المستشفيين, GSI AudioScreenerالجهاز المستخدم إلجراء الفحص األولي هو

وبناءاً عليه يجب على , ترددات في كل إذن5هيرتز وذلك بفحص 6000إلى 2000يمكن للفحص أن يكشف نقص السمع في أذن أو في أذنين في الترددات ما بين .الطفل حديث الوالدة أن ينجح في أربع من الخمس الترددات المفحوصة في كل أذن

.يليتم تسجيل معلومات األطفال المفحوصين ونتائج الفحص وعوامل الخطر في نموذج خاص ثم يتم إدخالها في قاعدة بيانات مخصصة على الحاسب اآل

:هـ 1429-12-30هـ إلى 1429-1-1اإلحصائيات من *

%(.3.89)منهم لم ينجحوا 396في مجمع الملك سعود الطبي، 4353في مستشفى اليمامة و 5821طفل حديث الوالدة، منهم 10174تم فحص -

،( 5821)عدد األطفال حديثي الوالدة الذي تم فحصهم في مستشفى اليمامة كان -

نجحن،2765)أنثى 2803و ( لم ينجحوا56نجحوا، و 2962)ذكر3018

(.لم ينجحن38و

،(4353)عدد األطفال حديثي الوالدة الذين تم فحصهم في مجمع الملك سعود الطبي كان -

(.لم ينجحن142نجحن، و 2038)أنثى 2180و ( لم ينجحوا160نجحوا، و 2013)ذكر 2173

في مستشفى اليمامة، 10165طفل حديث الوالدة، منهم ( 17559) هـ1429بلغ مجموع األطفال الذين تم فحصهم منذ بداية البرنامج وحتى نهاية شهر ذو الحجة لعام -%(.3.32)منهم لم ينجحوا 583في مجمع الملك سعود الطبي، 7394و

:مالحظة*

وكذلك فحص أسفل جذع OAEs))يقوم المختصون في عيادة السمعيات في مجمع الملك سعود الطبي بتوجيه أولياء أمور األطفال الذين لم يجتازوا الفحص األولي د الطبي حيث أن مجمع الملك سعو, لطفلهم وذلك من خالل شرائها من حسابهم الخاص( السماعات الطبية)إلى ضرورة استخدام المعينات السمعية (ABR)الدماغ

.س المجمع الطبيفي نف( لجنة أصدقاء المرضى)وذلك من خالل تحويلهم للجنة الشؤون اإلجتماعية , ال يوفر المعينات السمعية إال لمن ليس له القدرة على شرائها

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:هـ 1429-12-30هـ إلى 1429-1-1اإلحصائيات من

4353في مستشفى اليمامة و 5821طفل حديث الوالدة، منهم 10174تم فحص -

%(.3.89)منهم لم ينجحوا 396في مجمع الملك سعود الطبي،

نـجـح

لـم يـنـجـح0

500

1000

1500

2000

2500

3000

مستشفي اليمامة

)ذكور(

مستشفي اليمامة

)إناث(

مجمع الملك

سعود الطبي

)ذكور(

مجمع الملك

سعود الطبي

)إناث(

نـجـح

لـم يـنـجـح

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بلغ مجموع األطفال الذين تم فحصهم منذ بداية البرنامج وحتى نهاية شهر ذو الحجة

في مستشفى اليمامة، و 10165طفل حديث الوالدة، منهم ( 17559) هـ1429لعام

%(.3.32)منهم لم ينجحوا 583في مجمع الملك سعود الطبي، 7394

نـجـح

لـم يـنـجـح

Page 22: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...
Page 23: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...

Advance Audiology Lab

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Conventional Hearing Aid

feedback

occlusion

distortion

Chronic ear disease

cosmetics

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Hearing Implants – Level of InterventionBAHA/Atract

Bone Bridge

Sophono

Hearing aids

MEIs

( partial /Total)

C.I.EAS

ABI / MB

1ST . . . . .

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Cochlear Implant At KFSH&RC

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Cochlear implant program At KFSH&RC

Page 28: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...

Cochlear Implant Surgery

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Page 31: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...
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Middle Ear Implant

Passive ( classical ossiculopasty and Stapes Surgery).

Active ( Powered Middle ear implant).

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Conductive Hearing Loss

Ossiculoplasty ( Passive)

Page 34: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...
Page 35: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...
Page 36: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...
Page 37: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...

Active Implants

Esteem (Envoy)(Total implant)

Vibrant Sound Bridge ( VSB)Ototronix- Maxum

CARINA/ MET

Bone anchored HA

STRATIGY OF DIFFERENT IMPLANTABLE HEARING DEVICES

Ototronex

VSB

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Page 39: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...

Bone Anchored Hearing Aid (BAHA)

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Ponto Pro (Oticon Medical)BAHA

Cond.HL / Mix.HL /SSD Electromechanical (Bone Anchored Hearing

Aid)

BONEBRIDGE IMPLANT SOPHONO ALPH1 (M)

(Percutaneous)

(Transcutaneous)

The Baha® 4 Attract System

Page 41: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...
Page 42: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...

Middle Ear Implants

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SOUND BRIDGE VIBROPLASTY (VSB)

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VibroplastyVibrant Sound Bridge (SVB)

Treatment of hearing loss via

vibratory stimulation in the middle ear.

SNHL Conductive & Mixed HL

Incus Vibroplasty Round Window Vibroplasty

PORP / TORP Vibroplasty

Oval Window / Stapes

Vibroplasty

Third window Vibroplasty

Page 45: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...
Page 46: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...

Total Middle Ear Implant (Bionic Ear)

Page 47: Khalid M. Taibah , MBBch, FRCSc.ABOto ... - King Faisal Prize · Dr Abdulah AL Oteichan Dr Khalid Taibah Dr Mohamed Aboziad Dr Zeyad Mahasin Dr Peter MacArthur Dr Nabeal Zaher. ...

How It Works

Envoy ( Esteem) total implant

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MET® Middle Ear Implant

The sound processor

captures sound, processes it

and transmits it to the implant

The implant sends it to the

actuator

The actuator converts the

signal to mechanic vibrations,

which stimulate the cochlea

via the ossicular chain or

round window

A

B

C

D

AB

CD

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MET® Middle Ear Implant System

Implant

Fixation System

Button® Audio Processor

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Gene of Deafness research

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Research group:

This work was funded and supported in part by:

Prince Salman Centre for Disability Research

(PSCDR #04-IN-0005-04-EP-1)

King Faisal Specialist Hospital (RAC#2040039)

King Abdulaziz City for Science and Technology

ENT Medical Center,Riyadh KF MH,JeddahKF Medical city,Riyadh

Genetic study in the Deaf Saudi Arabian population

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AcknowledgementsKFSH&RC ENT Medical Centre

Prof Dr Khalid Taibah Prof Dr Khalid Taibah

Dr Faiqa Imtiaz Asst. Prof. Dr Ahmed Khater

Dr Brian Meyer Mrs. Saher Al Dehaish

Dr Khushnooda Ramzan Dr Adel Al Adawy

Dr Mohammad Al-Owain Lolo Juma

Dr Khaild Tabbara

Dr Fowzan Al-Kuraya King Fahd General Hospital

Dr Amal Humaidan Dr Sameera Sogaty

Bashair Al-Mubarak Dr Abdulmonem Al-Shaikh

Dr S. Bamkhaimar

Ghada Bin-Khamis

Abeer Al-Mostafa

Rabab Allam King Fahad Medical City

Dr Ameen Softah

PSCDR Special Thanks

Dr Sultan Al-Sedairy Sheikh Nasser Al-Mutawa ( Donation)

Dr Heidi Al-Askary

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Although non-syndromic HD is clinically

homogeneous, genetically it is

heterogeneous.

It is estimated that >300 genes are involved

in hearing process.

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55

Outline of statistics in previous studies

in hereditary hearing loss that our

study is targeting

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56

Saudi Population is Ideal for

Disease-Gene Discovery

Consanguinity 52% Consanguinity rate

Mostly first cousin marriages

Large family size Average nuclear family size is 8-10

U.A.E.Oman

Gulf ofOman

ArabianG

ulf

Iran

Kuwait

Iraq

Jordan

Red Sea

Egypt

Sudan

Yemen

ArabianSea

RUWALLA

ENAZASHAMMAR

MUTAIR

HARB

Juhainah

OTAIBAH

Jahadila

GhamidBuqum

Zahran

Dawasir

SUBAI

SUHUL

Yam

QAHTAN

Quraish

ASIR

MURRA

Manasir

Ajman

Awazim

Qatar

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57

Affymetrix GeneChip® Human Mapping 250K/6.0

Microarrays to identify regions containing any

known-deafness causing genes that were

subsequently sequenced.

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58

Clinical and Experimental Stages in the

Hereditary Deafness Study

Step I

Sep 2

Step 3

538 samples taken so far

500 patients screened for mutations in CONNEXIN genes

DNA Extracted

ENT CLINIC

AUDIOLOGY CLINIC

SUPPORT SERVEICE

KFSH&RC ENT MEDICAL CENTER

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Work Flow at (KFSH&RC): Pre-PCR

DNA EXTRACTION

PRE-PCR SETUP

PCR

AMPLIFICATION

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Work Flow at (KFSH&RC): Post-PCR

GEL

VISUALIZATION &

DOCUMENTATION

SEQUENCE ANALYSIS

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Publications

Khushnooda Ramzan a,*, Faiqa Imtiaz a, Khalid Taibah b, Samir Alnufieec, Mohammed Akhtar d, Selwa A.F. Al-Hazzaa e, Mohammed Al-Owain

ILDR1: Novel mutation and a rare cause of congenital deafness in the Saudi Arabian population.Khushnooda Ramzan a,*, Khalid Taibah b, Asma I. Tahir a, Nada Al-Tassan a, Amal Berhan a,Ahmed M. Khater b, Selwa Al-Hazzaa c, Mohammed

Al-Owain d,e, Faiqa Imtiaz a

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Gene therapy/ Molecu?

Genetic Map

Premarital Exam

National Program For Early Dedication Of Deafness

Mixed / Conductive HLSensory neural HL

Hearing Aid Stem cell ?

Rehab.

Cochlear Implant

Optical Cochlear Imp?

BSI/MBI/cortical ? Surgical option

Middle ear implant

Tube/Middle ear S.

Bone- AHA

Rehabilitation

Integration

Medical Treatment

Sign Language

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A race for 10 to 15 years awayCONCULSION:

Patient counselling !!!!!!

STEM CELL THERAPY GENE THERAPY

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Comparison of various strategies in inner ear drug delivery.

BLBbase–apex concentration gradient

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Kanzaki, S.; Saito, H.

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Biotechnology-based approaches of inner ear drug delivery

1-Gene therapy

Atoh 1 genes ,green fluorescent protein (GFP) , glial-derived neurotrophic factor (GDNF),

2- Stem cell therapy

embryonic stem cells,fetal dorsal root ganglion otocyst cells

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hair cell regeneration:

(1) direct of transdifferentiation from supporting cells (SCs) to new hair cells (HCs) (green

(2) proliferation of SCs and mitotic regeneration (red).Sho Kanzaki

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Gene therapy

• inject Atoh 1 genes into the cochlea to induce hair cell regeneration

• viral vectors include adenovirus, herpes virus, Sendai virus.

• adeno-associated virus vectors (AAV)s ,can pass the RWM without making a hole.

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Photomicrographs of whole-mounted guinea pig cochlea showing the distribution of GFP-fusion protein after injection of GFP-fused Sendai virus vector (GFP-SeV/DF) into the scala media

S. Karger AG

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Growing new Hair cellIn Guiana pigs (gene Math 1)

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Future Implant

• Robotics Cochlear Implant.

• Vestibular Implant.

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OSCILLOPSIA

Bilateral Vestibular functional loss

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VESTIBULAR SYSTEM IMPLANT

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Dr Sunil Narayan Dutt

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Dr Sunil Narayan Dutt

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THANKSKhalid M. Taibah , MBBch, FRCSc., ABOto.

Professor ,Alfaisal University, Medical Collage, Riyadh

Director of ENT Medical Center, Riyadh

Founder of Saudi Society For Hearing Impairment (Saudi Hi)

Former, Head Section Otolaryngology,H&N King Faisal Sp.Hosp. &RC

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84

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Empedocles, Greek philosopher, known for numbering the four basic elements

(fire, air, earth and water),

was the first to describe the cochlea.

He called the structure , the name of a seashell found in the Mediterranean region.

However, his discovery intrigued him more for the perfect and singular shape of that anatomical structure than its function or relation with hearing.

EMPEDOCLLES ( c. 490-c.430)

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Aristotle ( 384 B.C. to 322 B.C.)

Aristotle, one of the best-known Greek philosophers,

even without anatomical knowledge, created a theory on hearing.

He believed there was a resonating space within the inner ear, which vibrated in

response to sound.

Pure air was implanted in the ear as the person was born, and congenitally deaf people

did not have this air implanted there.

As time passes, people would lose this pure air, thus reducing hearing.

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أبو القاسم الزهراوى

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88

923 A.C.

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1700 - 1800

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1800 - 1900

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Burt D. La Force (1869-1947)

Tonsillectomies by Fahnestock, Mathieu and Brüning

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Early Electric laryngoscope ( Theodor Simon 1937 )

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KFSH&RC ENT Department

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Carina® Fully Implantable Middle

Ear Implant

The subcutaneous

microphone captures sound,

and sends it to the implant

The implant sends it to the

actuator

The actuator converts the

signal to mechanic vibrations,

which stimulate the cochlea

via the ossicular chain or

round window

B.

C

D

B

CD

A

A

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100th Year Anniversary

Department of Otolaryngology, McGill University

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100th Year Anniversary

Department of Otolaryngology, McGill University

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100th Year Anniversary

Department of Otolaryngology, McGill University

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100th Year Anniversary

Department of Otolaryngology, McGill University

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100th Year Anniversary

Department of Otolaryngology, McGill University

McGill UniversityOtolaryngology, Head & Neck Surgery

SAUDI GRADUATES1982-2005

1. Moheedin Mandura, Makkah

2. Khalid Taibah, Riyadh

3. Surayie Al Dousary, Riyadh

4. Khalid Al Noury, Jeddah

5. Essam Al Zimaiti, Jeddah

6. Saeed Al Ghamdi, Assir

7. Saleh Al Ghamdi, Dhahran

8. Khalid Al Ghamdi, Jeddah

9. S. Al Jedher, Dhahran

10. Ashraf Al Benayan, Jeddah

11. Saleh Al Dhahri, Riyadh

12. Nasser Al Faqeeh, Assir

13. Ahmad Al Ammar, Riyadh

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Disease CharacteristicsHereditary Hearing Loss:

Non-Syndromic or Syndromic

Worldwide rate for pre-lingual deafness is between

1-2/1000

Incidence is higher in Saudi Arabia (Prof. Zakzoug)

( 1.6%)

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108

Principal Aim

ESTABLISH THE ROLE OF CONNEXIN

GENES, GJB2 AND GJB6 (DFNB1) IN

THE AETIOLOGY OF NON-SYNDROMIC

HEREDITARY DEAFNESS IN SAUDI

PATIENTS

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110

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Khushnooda Ramzan a,*, Faiqa Imtiaz a, Khalid Taibah b, Samir Alnufiee c, Mohammed Akhtar d, Selwa A.F. Al-Hazzaa e, Mohammed Al-Owain c,f

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ILDR1: Novel mutation and a rare cause of congenital deafness in the Saudi Arabian population.

Khushnooda Ramzan a,*, Khalid Taibah b, Asma I. Tahir a, Nada Al-Tassan a, Amal Berhan a,Ahmed M. Khater b, Selwa Al-Hazzaa c, Mohammed Al-Owain d,e, Faiqa Imtiaz a

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114

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Conclusion :

FOR Genetic study in the Saudi Arabian population :

Our results strongly indicate that DFNB1 only accounts for 3% of non-syndromic hearing loss in the Saudi Arabian population of ethnic ancestry.

The overall results of this study are highly suggestive that underlying molecular basis of autosomal recessive non-syndromic deafness in Saudi Arabia is very genetically heterogeneous.

In addition, we report that there does not seem to be any common or more prevalent loci, genes or mutations in patients with autosomal recessive non-syndromic hearing loss in patients of Saudi Arabian tribal origin.

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Photomicrographs of histological sections of guinea pig scala media

Hair cells and supporting cells from the organ of Corti in an inoculated ear.

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Photomicrographs of histological sections of guinea pig scala media

Sensory epithelial cells and fibrocytes of the scala tympani