Regional Blocks of the Upper Limb and Thorax RRTRanjith Thampi
Blocks of the UL and Thorax made easy. Most methods mentioned here are modifications and not classical methods used that maybe be required for examination writing purpose.
Facial and Hearing Preservation in Acoustic Neuroma SurgeryDr Fakir Mohan Sahu
Vestibular Schwannoma Most common CPA (Cerebellopontine angle) tumor changed from prolongation of life to nerve preservation explained in brief with all pre- operative work up.
Regional Blocks of the Upper Limb and Thorax RRTRanjith Thampi
Blocks of the UL and Thorax made easy. Most methods mentioned here are modifications and not classical methods used that maybe be required for examination writing purpose.
Facial and Hearing Preservation in Acoustic Neuroma SurgeryDr Fakir Mohan Sahu
Vestibular Schwannoma Most common CPA (Cerebellopontine angle) tumor changed from prolongation of life to nerve preservation explained in brief with all pre- operative work up.
Osseous anatomy, Types of approaches(Position,landmarks,Incision,Superficial and Deep surgical dissection) , structures at risk, Extensile approaches with diagrams and eponymous .
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Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
- WOMEN’S HEALTH: FERTILITY PRESERVATION
- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
- ARTIFICIAL INTELLIGENCE AND ETHICS
- GENE THERAPY
- BEYOND BORDERS: GLOBAL INITIATIVES FOR DEMOCRATIZING LIFE SCIENCE TECHNOLOGIES AND PROMOTING ACCESS TO HEALTHCARE
- ETHICAL CHALLENGES IN LIFE SCIENCES
- Prix Galien International Awards Ceremony
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
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Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
2. Topics
• Supraclavicular blocks
• Infraclavicular blocks
• Axillary blocks
• TAP blocks
• Femoral nerve blocks
• Sciatic nerve blocks in the popliteal fossa
Number
of slides:
66
3.
4. INTERSCALENE BLOCK:
Blockade occurs at the level of the superior and middle trunks
SUPRACLAVICULAR BLOCK:
Blockade occurs at the distal trunk-proximal division level.
INFRACLAVICULAR BLOCK:
Blockade occurs at the level of the cords
AXILLARY BLOCK:
Blockade occurs at the level of the terminal nerves.
7. SUPRACLAVICULAR BLOCKS
• The advantages:
–brachial plexus is compact
–the nerve visibility is extremely good
–the structures
–are shallow (20- to 30-mm field
8. SUPRACLAVICULAR BLOCKS
• Indications for operations:
– on the elbow,
– forearm,
– hand
• Risk :
1. vascular puncture in an
area that is difficult to
compress
2. pneumothorax.
9. in-plane approach from medial to lateral to ensure
that the needle will pass over the subclavian artery can
be used to reach the brachial plexus
10. Current technique:
• patient position:
– semi-sitting
– head turned to the opposite side
– the arms flush with the body.
11. Key Points
• Proximity to the phrenic nerve
occurs if the block location is
too cephalad
• linear transducer (20- to 30-
mm footprint)
• The medial-to lateral and the
lateral-to-medial in-plane
approaches both have
excellent efficacy and safety
• The C5 ventral ramus (and other
contributions to the brachial
plexus) can pass over or through
the anterior scalene muscle rather
than between the scalene muscles.
• When this condition is identified,
the block is usually performed at a
more caudal position in the neck to
avoid incomplete brachial plexus
anesthesia
12.
13.
14.
15.
16. Supraclavicular block with ultrasound imaging.
A, In this external photograph of ultrasound-guided supraclavicular block, the needle
approaches the brachial plexus from medial to lateral.
B, Sonogram of supraclavicular block with ultrasound guidance. The block needle approaches
from medial to lateral within the plane of imaging for this procedure. Local anesthetic is observed
to distribute around the compact brachial plexus
18. INFRACLAVICULAR BLOCKS
Advantages
• complete brachial plexus
anesthesia
• is a stable place for a catheter
• provides anesthesia to the arm
• and hand.
• no manipulation of the arm is
necessary
Disadvantages
• Deeper block
• Needle or probe manipulations are
necessary
19. Current technique:
• Arm is abducted the to straighten the neurovascular
bundle: block is easier
• three arterial wall-hugging cords are named with respect
to the second part of the axillary artery: medial, lateral,
and posterior.
• artery is visualized in short-axis view deep to the
pectoralis major and minor muscles
• Most practitioners use an in-plane approach
20. posterior to the axillary artery for
single-shot or catheter placement
The ideal place for local anesthetic:
21. The cords of the brachial plexus do not need to
be directly visualized for successful block
22.
23.
24.
25. External photograph of the
setup for infraclavicular block
shows the arm has
been abducted in this case
Sonogram of the cords of the
brachial plexus (yellow arrows)
are adjacent to the axillary artery
(A) and vein (V).
The neurovascular bundle lies
deep to the pectoralis major
(PMa) and pectoralis minor (PMi)
muscles in this anatomic region
Needle tip is in
position for
infraclavicular block and
the resulting local
anesthetic distribution
26. Sonographic Signs Indicating Infraclavicular Block Success
U-shaped distribution underneath the axillary
artery
Separation of cords from axillary artery
White wall appearance to the axillary artery
Reduction in axillary artery diameter
Dark streak underneath the axillary artery in the
long axis view
28. AXILLARY BLOCKS
• cardinal weakness has been the failure to block the
musculocutaneous (MCN) nerve
• provides surgical anesthesia:
– elbow
– more distal upper extremity
• The shallow depth of the neurovascular bundle (a 20-mm
field is typical) relativel easy with US guidance
29. AXILLARY BLOCKS
• the MCN nerve has a
characteristic change in
shape:
– adjacent to the artery (round)
– coracobrachialis muscle (flat)
– exiting the muscle (triangular)
• Both techniques can be used:
– in-plane
(with needle approaching from the
lateral side of the arm)
– out-of-plane
(with needle approaching from
distal to proximal)
30. AXILLARY BLOCKS
• The block is performed in the
proximal axilla
• transducer gently pressed
against the chest wall to
visualize the conjoint tendon
of the latissimus dorsi and
teres major
• A high-frequency linear probe
with a small footprint (25 to 50
mm)
• The ideal location for LA
injection is between the nerves
and the artery so that
separation between the two
structures occurs to ensure
distribution within the
neurovascular bundle
31. the median
(superficial
and lateral to
the artery)
the ulnar
(superficial
and medial to
the artery),
and
the radial
(posterior and
lateral or
medial to the
artery) nerves .
32.
33.
34.
35. Axillary block with ultrasound guidance.
A, External photograph demonstrates the in-plane approach.
B, Sonogram of the neurovascular bundle in the short axis view shows the
needle tip in-plane after injection of the local anesthetic. The probe
compression is just sufficient to coapt the walls of the satellite veins. The
block is performed at the level of the conjoint tendon of the latissimus dorsi
and teres major (white arrows), which lies under the neurovascular
structures. The third part of the axillary artery (A) and nerves of the brachial
plexus—radial, ulnar, median, and musculocutaneous—in order from medial
to lateral (yellow arrows) are shown
36. Distribution of Blockade
• The axillary nerve itself is not blocked because it
departs from the posterior cord high up in the axilla.
• As a result, the skin over the deltoid muscle is not
anesthetized.
• Medial skin of the upper arm (intercostobrachial nerve,
T2) can be blocked by an additional subcutaneous
injection just distal to the axilla
37.
38.
39. Key points
• In an adult patient, 20 to 25 mL of local anesthetic is
usually adequate for successful blockade.
• Complete spread around the artery is necessary for
success but infrequently seen with a single injection.
• Two to three redirections and injections are usually
necessary for reliable blockade, as well as a separate
injection to block the musculocutaneous nerve.
40. These injections result in excellent clinical blocks.
The MCN nerve is usually blocked
within the coracobrachialis, where its flat shape gives a
large amount of surface area for rapid block
41. COMPARISON OF THE INFRACLAVICULAR AND AXILLARY
APPROACHES TO BRACHIAL PLEXUS BLOCK
Infraclavicular Block Axillary Block
Depth Deep (two muscles) Shallow
Onset Slower Faster
Tourniquet tolerance Better Good
Catheter success High Low
43. TAP BLOCK
• Four peripheral nerves, the subcostal, ilioinguinal,
iliohypogastric, and genitofemoral, primarily innervate
the lower abdominal wall.
• three nerves through the abdominal wall within the
layer between the TA and the IO muscles makes this the
desired anatomic location for regional block
• patient position: supine
• The transducer is placed between the iliac crest and
costal margin in the midaxillary line.
44. TAP BLOCK
• Injection is in the fascial layer that separates the IO and
the TA muscles
• 15 to 20 mL of dilute local anesthetic is injected
• Approach: in-plane from the ANT side and directed
toward the posterolateral corner of the TA muscle
45.
46.
47. The kayak sign demonstrates successful TAP injection.
The fascia between the IO and TA muscles is split apart in the shape
resembling a kayak
48. Ilioinguinal nerve block
with ultrasound
imaging.
The
transducer is rotated
and placed near the
iliac crest for
ilioinguinal
nerve block.
50. FEMORAL NERVE BLOCKS
• advantages US:
– more complete block
– local anesthetic volume
sparing
– fewer vascular punctures
• The femoral nerve usually lies
lateral to the femoral A in the
groove formed by the iliacus
and psoas muscles.
• Nerve: oval or triangular in
cross-sectional shape
• anteroposterior diameter of 3
mm and a mediolateral
diameter of 10 mm.
51. Key Points
• some tilting of the US probe is necessary for the sound
beam to meet the nerve perpendicularly for optimal
scanning
• some rotation : the FN has a slight medial-to-lateral
course;
• FN is covered by echobright adipose tissue and fascia,
the echogenic outer sheath of the nerve is difficult to
establish
52. Key Points
• a broad (35- to 50-mm footprint) linear transducer is
used
• Both approaches can be used :
– in-plane (from lateral to medial)
– out-of-plane (from distal to proximal).
• The fascia iliaca has a characteristic mediolateral slant
53. FEMORAL NERVE BLOCKS
The desired distribution:
• is local anesthetic layering
under or completely around
the femoral nerve
• When layering of LA is
restricted over the nerve, the
concern is that the fascia iliaca
is intact and that block failure
will result.
54.
55.
56. Cross-section at the block location below the inguinal crease. The femoral nerve lies
deep to the fascia lata and fascia. iliaca (iliopectineal fascia) and is separated from
the artery and vein(s).
57. Femoral nerve block with ultrasound imaging (inplane
approach).
A, External photograph shows the setup for femoral nerve
block.
B, The needle tip is in position before injecting adjacent to
the femoral nerve (yellow arrow). The femoral nerve lies
lateral to the femoral artery (A).
C, Local anesthetic surrounds the femoral nerve
after injection.
58. saphenous branch of the FN can be blocked in the
midthigh, deep to the sartorius muscle using US
guidance
advantage: that the quadriceps motor block is reduced.
59. Saphenous nerve block in the middle thigh with ultrasound imaging (in-planeapproach).
A, External photograph shows the setup for saphenous nerve block.
B, The needle tip has been placed through the Sartorius muscle adjacent to the saphenous nerve
(yellow arrow) and superficial femoral artery (A) before injection.
C, Local anesthetic surrounds the saphenous nerve after injection deep to the sartorius muscle
61. Sciatic nerve blocks in the popliteal fossa
• One of the most common approaches :
– using a lateral approach in supine position with the leg
elevated
• The division of the sciatic nerve:
– provides a broad target
– large surface area to promote clinical block characteristics
• the needle tip: between the tibial and common peroneal
near the division so that a single injection distributes to
both nerves
62.
63.
64.
65. Popliteal block with ultrasound imaging (in-plane approach).
A, External photograph shows the setup for popliteal nerve block in the supine position. The leg is elevated,
and the transducer is applied to the posterior surface of the leg.
B, The needle approaches the bifurcation of the sciatic nerve in the plane of imaging from the lateral aspect of
the leg.
The needle tip is positioned between the tibial (long yellow arrow) and common peroneal (short yellow arrow)
nerves
66. Sciatic nerve blocks in the popliteal fossa
• The TN has a straighter course than the CPN and has
twice the cross-sectional area.
• Move the foot : the nerves have motions that can be
helpful for nerve identification in some patients.
• The advantages of this approach:
– are the convenient position,
– transducer position is remote from the site of needle entry,
– parallel in-plane approach of the block needle results in
optimal needle tip visibility