The document discusses the Kocker-Langenbeck surgical approach for hip fractures. It provides a brief history of the approach's development. The key steps of the classic approach are described, including indications, positioning, incision, exposure of anatomical structures, fracture reduction techniques, and potential complications. Modifications like trochanteric osteotomy are also covered. The approach remains a workhorse for treating posterior hip fractures but requires careful exposure and identification of structures to minimize risks.
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References: *Bonasia, Davide Edoardo et al. "Anterolateral Ligament Of The Knee: Back To The Future In Anterior Cruciate Ligament Reconstruction". Orthopedic Reviews 7.2 (2015)
Biomechanical Results of Lateral Extra-articular
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Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
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4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
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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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2. Kocker-Langenbeck approach
• Learning outcomes:
Historical Development of the approach
Indications:
Preoperative precautions
Surgical Anatomy
Classic steps
Modifications:
Complications
3. Kocher- Langebeck Approach
Working horse!
Equally with ilioinguinal approach (40 % )
Single column
Many modifications were added
-Trochanteric osteotomy
-Gluteus maximus dissection plane
-External rotators preservation
4. Historical Development
1-Von Langenbeck
In 1874 described his “longitudinal
incision for hip infections“
"from above the sciatic notch to the
middle of the greater trochanter
passing between the bundles of the
gluteal maximus muscle“
Von Langenbeck
(1810-1887)
5. 2-Theodor Kocher (1841-1917)
In 1911 described the caudal extension
of Langenbeck’s approach
"The incision is curved, over femoral shaft,
the base of the great trochanter
upwards obliquely and
backwards in the direction of the
gluteus maximus"
Theodor Kocher
(1841-1917)
6. 3-Judet et al (1958)
have combined these
two classical posterior incisions,
gaining the advantages offered by each.
Since 1960,Letournel et al called it the
Kocher-Langenbeck approach.
7. •Indications:
FRACTURE PATTERN
DETERMINES APPROACH
-Posterior wall
-Posterior column
-Posterior wall &column
-Transverse with posterior wall
-Transverse with major
displacement at the posterior
column (juxtatectal and
infratectal).
- Posterior elements in T-type
8. at the level of the roof (Transtectal)
of the acetabulum
(therefore involving the weightbearing area )
Either sequential ilioinguinal then Kocher-Langenbeck
Or Kocher Langenbeck with trochanteric osteotomy
10. •Preoperative preparation:
• Surgery 3 to 5 days after injury.
• Review the patient’s general condition, limb N/V status
• blood transfusion.
• Review the imaging studies (anteroposterior pelvic and Judet
views and CT.
• Operating table, instruments, and implants.
• Retractors, Clamps , Forceps, Pusher.
• 3.5-mm screws and 3.5-mm reconstruction plates
• 1/3 tubular , mini-screws (2mm
11. • Soft tissue Retractors
Hohmann
Sciatic nerve (or Deever)
Cobra
Taylor (gluteal muscles)
Schanz pins
Sciatic n. retractor in the lesser notch
13. • Jungbluth clamp with 2 screws technique
Ball spike pusher with spiked disc for
comminuted bone
14. Positioning :Prone or lateral
Prone:
-Femoral head in reduced position
(gravity helps reduction of transerve fracture)
-90o knee flexion places the sciatic nerve
in a relaxed position
-allows digital access to the quadrilateral
surface (transverse or T type fractures)
15. Prone Position:
Disadvantages
-Un-scrubbed assistant is required
for intraoperative adjustment of the table
-Not allowing extension by
trochanteric osteotomy
-Muscular or high BMI --- heavy posterior flap
-Disorientation of the surgeon
--Special padding fo the chest and bony prominence
16. • So Lateral positioning
• Easy maneuverability of the limb
• Allow trochanteric flip osteotomy
• Muscular and high BMI
But:
Femoral head displaces fragments
Folded sterile towels allow for
femoral head subluxation
-Incomplete hip extension and knee
flexion—higher sciatic palsy
17. • In Both positions
Keep the hip slightly extended and knee flexed
90 °
Sciatic palsy reduced from 18% to 5%
c
a
d
a
v
e
r
18. No advantage to either position for the posterior
approach could be found
With equivalent radiologic outcomes between both
groups, a significantly higher rate of infection (p 0.017) were found in
the prone group
19. Residual fracture displacement with transverse
fractures reduced and stabilized in the lateral position
compared with those positioned prone.
21. Kocher- Langenbeck
Approach (prone)
• Steps
Surface landmarks and incision planning
Skin incision
Fascia lata & gluteal fascia
Gluteus maximus dissection
Trochanteric bursa
Gluteus maximus insertion release
Identification of the sciatic nerve
Gluteus medius retraction
Pyriformis muscle identification & release
Re-identification of the sciatic nerve course
Obturator internus and gemelli release
Lesser notch retractor
Fracture reduction and fixation
Muscle debridement and closure
22. Kocher- Langenbeck
Approach(prone)
• Prone with flexed knee on a
radiolucent table
• C-ram opposite side of the
surgeon
• Imaging of A/P and Judet
views
Inlet and outlet views freely
23. • Surface Landmarks:
PSIS (posterior superior iliac spine)
G. Trochanter
F. Shaft
• Skin incision:
-6-8 cm form PSIS
-Tip of GT
-Centre of GT
-Centre of femoral shaft
24. Fascial incision
-Start the dissection of gluteal maximus and its
fascia using scissors then separate the muscle fibers with fingers
-Iliotibial tract is dissected using scalpel
25. • Gluteus maximum splitting
• - posterior 2/3 muscle belly (inferior
• gluteal artery),
• - anterior 1/3 belly (superior gluteal
Artery
Inferior gluteal bundle is the limit
26. • Trochanteric bursa:
Free the covering layer over the rotators
• Visualization of the sciatic nerve carefully
27. • Gluteus maximus insertion release
• Detach the gluteus maximus 1.5 cm
from its insertion into the
gluteal tuberosity of the femur.
• less tension and easier mobilization
• A constant perforator
should be cauterized
28. • Identification of the sciatic nerve
Rotators damage in posterior dislocation
Identified at the quadratus femoris
No tension or compression is applied
Define the upper border of Q femoris
Quadratus
29. • Identification of the pyriformis muscle
Retract the gluteus Medius tendon
at the G trochanter limited by
Superior gluteal bundle
Beneath it lie both the G minimus (HO)
, and rounded pyriformis tendon.
G Medius
G
minimus
Pyriformis
30. • Pyriformis tendon should be
tagged and incised
1.5 cm from its insertion
Avoid injury of Medial Circumflex
femoral Artery (MCFA)
31. • Blood supply of the femoral head
Deep branch of MCFA
• Can be injured :
-Detachment of the Q femoris
(femoral side)
-Detachment of pyriformis or
Obturator Int less than 1.5 cm
32. Re-Identification of the sciatic nerve (SN) course:
(relation to Pyriformis)
84% deep to the muscle
(anterior)
Trace the nerve till the
G notch
33. Variation of S nerve course (Common Peroneal CPN-Tibial TN)
84% 12% 3%
1%
38. • Tips for fractures reduction and Fixation:
-Subperiosteal elevation of
Obturator internus fascia,
Quadrilateral plate ,
Gluteus minimus (HO)
-Carefully debride the fragment edges.(reduction)
-Never devitalize the soft tissue attachment (capsular attachment)– AVN
of the posterior wall
43. • Apply interfragmentary wall screws
• Double plates for the column
• Check intra-articular position in all views
44. Wound closure
• Meticulous debridement Remove necrotic tissue (G minimus) and
irrigate the entire wound
• suction drains
• Reinsert all tendons and approximate the split parts of the gluteus
maximus
• closure of the iliotibial tract
45. • Modifications:
1-Trochanteric flip osteotomy:
-Supraacetabular region with superior wall fragment
-Femoral head fracture with surgical dislocation
-Anterior column screw –transtectal transverse
Lateral approach
Single sheath including
V lateralis, G Medius
1.5 cm
52. • Anterior column screw after trochanteric osteotomy:
4 cm above the acetabulum just posterior to anterior gluteal line
In line with center of reduced hip (12 O’clock) ( Ob Outlet, IL Inlet)
53.
54. Complications:
1-Sciatic Nerve Palsy; 3-5%
-Always flex knee 90 °
-Proper identification
-Expect variations
-Intermittent retraction
-Never two retractors in both notches
56. Take Home Message
Kocher –Langenbeck
-Non extensile (use trochanteric osteotomy)
-Posterior fractures
-Prone is better except in some situations
-Special instruments
-Meticulous exposure and identification
-Tips for reduction and fixation
Was The working horse for displaced acetabular fractures accounting more than 52 %
But it is now equally used with ilioinguinal approach accounting for about 40 %
So it is still one of the working horses for management of displaced acetabular fractures.
A single column non-extensile approach for the posterior acetabular structures, but can fix some parts of the anterior column
Many modifications are present to allow for better exposure and preserve the hip joint function and viability of the femoral head that included –osteotomy
Fixation of posterior acetabular structures
The classical Kocher-Langenbeck approach allows direct visualization of the entire posterior column and wall and part of thesupraacetabular region. part of the inner surface of the true pelvis (quadrilateral surface) can be palpated throughthe greater sciatic foramenAdditional surgical hip dislocation with a bigastric trochanteric osteotomy allows a near total exposure of the acetabular roof andnear total direct visualization of the articular surface
For acetabularfracture reduction, specialized reduction tools, such as pelvic reduction clamps and forceps, ball spike pushers,and bone hooks, are used. For fracture fixation, 3.5-mm cortical screws and 3.5-mm reconstruction plates arecommonly used. Other implants that might be necessary, depending on the fracture type, are the one-thirdtubular plates (used as spring plates) and the 2.0-mm miniscrews (used for the 2-level reconstruction ofmarginal impaction of the posterior wall)
Offset clamps for anterior column reduction
The angle of the jaw clamp avoid pressing the sciatic nerve during inserion through the Greater notch
two-screw technique with a Jungbluth clampand an angled pelvic reduction clamp through the greater sciatic notch, placed on the quadrilateral surface.
This spiked disc can be applied for any ball –tipped instrument
Prone position either with or without traction table and fixed distal femoral traction
If the surgeon is routinely using the lateral position only
The patient in the lateral position with no fixed traction. A stack of towels tuckedunder the thigh acts as a fulcrum to assist with hip subluxation. Longitudinal traction is providedmanually via the Schanz pin placed into the femur at the level of the trochanters. The extremityand hip are free for repositioning as needed.
Reduction of the sciatic palsy by this maneuvers as extension increase nerve tension and reduces movability (examination in a cadaver)
Dotted line allows for A more proximal extension may improveexposure in obese or muscular patients. This extension will be through the skin but not the gluteus maximus muscle (as it will be stopped by the 1st bundle inferior epigastric )
Use your finger splitting the muscle to avoid injury of the inferior gluteal bundle
As shown by the yellow arrow
Free the layer of fat covering the short external rotators, exposing the insertion of the piriformis tendon, the gemelli, and the internal obturator muscle.
Constant bleeding needs to be auterized
The sciatic nerve (see illustration) lies posterior to the gemelli and internal obturator muscles, and anterior to the piriformis muscle, between the greater trochanter and the ischial tuberosity.
Carefully visualize the sciatic nerve.
Ensure at all times that no direct pressure or stretching is exerted on the nerve.
1st first perforating branch of the profunda femoris
The identification of the sciatic nerve more proximally is unsafe because of thepotentially distorted anatomy due to the fracture and/or trauma and should consequently be avoided. Handlethe sciatic nerve gently, avoiding excessive release of the surrounding fat tissue, and follow it up to the greatersciatic notch. Awareness of the nerve position and tension or compression applied to it at any given timethroughout the procedure is of paramount importance
Retraction of thesemuscles can be maintained by inserting two smoothSteinmann pins into the ilium above the greater sciaticnotch. Identify and protect the superior gluteal nerveand vessels as they exit the greater sciatic notch
Use Bovie and protect by your finger
Black lines indicate the variable distances through the course of the artery with a closer position to the bone in the pyriformis and ob internus but nof the Q FEMORIS (so never detach the quadratus femoris from the femoral side but from the ischial side
Type A variation where the SN exits the pelvis as asingle entity anterior (deep) the PM
B Peroneal division pierces the muscle
Type C peroneal division posterior to muscle (superficial ) and tibial diviosn anterior (deep)
We met this variation one time before (2 sciatic nerves)
Type A variation where the SN exits the pelvis as asingle entity anterior (deep) the PM
B Peroneal division pierces the muscle
Type C peroneal division posterior to muscle (superficial ) and tibial diviosn anterior (deep)
We met this variation one time before (2 sciatic nerves)
Fragement edges for reduction
Schantz screw for manipulation of the ischiopubic fragment
Direction of Jungbluth clamp is away from the notch to prevent compression of the sciatic nerve
Assess the anterior wall direction by index finger through the quadrilateral plate and
The starting point of drilling is about 2 cm from the apex of G notch
direct the dill and scres aided by fluoroscopy
Screw direction is verified in Obturator outlet and Iliac outlet views then apply your plates
If screw is extraarticular in one view it is extraarticular