Mengenali Facial Palcy pada Trauma Wajah dan Tatalaksana Pembedahan

Bell's palsy is the most common neurological disorder affecting the cranial nerves with an onset that is rapid and unilateral, and it is common cause of facial paralysis worldwide. Bell's palsy occurs due to compression or enlargement of the stylomastoid foramen and causes nerve obstruction or damage caused by trauma, infection, inflammation, autoimmune, ischemic. This article aims to review bell's palsy, specifically motor nerve alignment, surgical disorders and management of bell's palsy. Source searches were carried out on online portals for journal publications such as Google Scholar (scholar.google.com) and the National Centre for Biotechnology Information/NCBI (ncbi.nlm.nih.gov), with the keyword “Facial palcy, dan Bell’s palcy”. In the United States, the annual incidence of Bell's palsy is approximately 23 cases per 100,000 people. Permanent facial paralysis and non-transient functional deficits are the main indications for surgical reconstruction of facial nerve function. The indications for surgery depend on the severity of the nerve lesion, blunt trauma that causes nondegenerative neuropraxia does not require surgical reconstruction, whereas disorders leading to degenerative neurotmesis require surgery.

Unilateral Corneal Insult Also Alters Sensory Nerve Activity in the Contralateral Eye

After the unilateral inflammation or nerve lesion of the ocular surface, the ipsilateral corneal sensory nerve activity is activated and sensitized, evoking ocular discomfort, irritation, and pain referred to the affected eye. Nonetheless, some patients with unilateral ocular inflammation, infection, or surgery also reported discomfort and pain in the contralateral eye. We explored the possibility that such altered sensations in the non-affected eye are due to the changes in their corneal sensory nerve activity in the contralateral, not directly affected eye. To test that hypothesis, we recorded the impulse activity of the corneal mechano- and polymodal nociceptor and cold thermoreceptor nerve terminals in both eyes of guinea pigs, subjected unilaterally to three different experimental conditions (UV-induced photokeratitis, microkeratome corneal surgery, and chronic tear deficiency caused by removal of the main lacrimal gland), and in eyes of naïve animals ex vivo. Overall, after unilateral eye damage, the corneal sensory nerve activity appeared to be also altered in the contralateral eye. Compared with the naïve guinea pigs, animals with unilateral UV-induced mild corneal inflammation, showed on both eyes an inhibition of the spontaneous and stimulus-evoked activity of cold thermoreceptors, and increased activity in nociceptors affecting both the ipsilateral and the contralateral eye. Unilateral microkeratome surgery affected the activity of nociceptors mostly, inducing sensitization in both eyes. The removal of the main lacrimal gland reduced tear volume and increased the cold thermoreceptor activity in both eyes. This is the first direct demonstration that unilateral corneal nerve lesion, especially ocular surface inflammation, functionally affects the activity of the different types of corneal sensory nerves in both the ipsilateral and contralateral eyes. The mechanisms underlying the contralateral affectation of sensory nerves remain to be determined, although available data support the involvement of neuroimmune interactions. The parallel alteration of nerve activity in contralateral eyes has two main implications: a) in the experimental design of both preclinical and clinical studies, where the contralateral eyes cannot be considered as a control; and, b) in the clinical practice, where clinicians must consider the convenience of treating both eyes of patients with unilateral ocular conditions to avoid pain and secondary undesirable effects in the fellow eye.

P114 ROBOTIC INGUINAL HERNIA REPAIR (RTAPP): ANATOMY LESSONS AND RESULTS OF A CASUISTIC OF 302 OPERATED HERNIAS

Aim The purpose of this study is to apply the resources of robotics to inguinal hernia repair (r-TAPP) and to investigate where specific optimizations to the surgical technique of can be achieved. Material and Methods The results of 302 consecutive r-TAPP surgeries performed over an 18-month period are presented. It is a cohort study without a control group. The study was approved by the ethics committee (Ref. No. 2019-02046). Decisions on interventions (suturing of the transverse fascia or fibrin glue sealing of the inguinal canal) and mesh size were made intraoperatively. Patients were followed up six weeks postoperatively. Results In every fourth patient, a femoral, obturator, or Spieghel hernia was diagnosed in addition to symptomatic inguinal hernia. Mesh fixation with absorbable suture at 4 points was matured. The operative time averaged 71 minutes for unilateral, 103 minutes for bilateral and 95 minutes for unilateral recurrent hernias. 48% of procedures were performed by residents. Seroma incidence decreased from 15.0% in the first period to 5.1% in the third study period. None of the patients experienced pain symptoms due to nerve lesion. The study provided new clarity about the blood supply patterns of the lipoma, the course of the genital branch and the constitution iliac fascia. Conclusions Suturing of the transversal fascia, fibrin glue sealing of the inguinal canal, and suture fixation of the mesh are steps who must be validated in future studies. Robotics provides optimal conditions for residents training, without learning curve on the patient and with predictable OR times. Postoperative seroma formation and complication rate of r-TAPP are low.

687 ADVERSE EVENTS DURING MINIMALLY INVASIVE ESOPHAGECTOMY IN PRONE POSITION

Since the initial description of laparoscopic fundoplication in 1991 for the treatment of gastroesophageal reflux disease, different minimally invasive procedures have been developed until nowadays, when esophagectomy is performed using combined thoracoscopy and laparoscopy. Objective: The aim of our study is to analyze the intraoperative complications of minimally invasive esophagectomy in prone position. Methods Between November 2011 and January 2021, 70 patients underwent minimally invasive esophagectomy in prone position in the Hospital Interzonal General de Agudos General San Martín and private practice of La Plata city. Results During the abdominal stage one patient presented coronary vessel injury and the other with short vessel injury. The complications occurring in the thoracic stage included lung injury, azygos arch injury, thoracic duct section, laryngeal recurrent nerve lesion, main stem bronchus injury, and pericardium lesion, during lymph node resection. Most of these complications occurred in the first 30 patients, while in the remaining 40 cases only two complications (p value = 0.4). Conclusion Minimally invasive esophagectomy in prone position is a feasible and safe procedure that can cause serious intraoperative complications due to its complexity. Although the results of our series did not show statistically significant differences, the number of complications during surgeries performed by the same team showed an important reduction associated with better training.

Muscle Degeneration Induced by Sequential Release and Denervation of the Rotator Cuff Tendon in Sheep

Background: In a sheep rotator cuff model, tenotomy predominantly induces fatty infiltration, and denervation induces mostly muscle atrophy. In clinical practice, myotendinous retraction after tendon tear or lateralization after tendon repair tear may lead to traction injury of the nerve. Purpose/Hypothesis: To analyze whether an additional nerve lesion during rotator cuff repair leads to further degeneration of the rotator cuff muscle in the clinical setting. We hypothesized that neurectomy after tendon tear would increase atrophy as well as fatty infiltration and that muscle paralysis after neurectomy would prevent myotendinous retraction after secondary tendon release. Study Design: Controlled laboratory study. Methods: Twelve Swiss alpine sheep were used for this study. For the 6 sheep in the tenotomy/neurectomy (T/N) group, the infraspinatus tendon was released; 8 weeks later, the suprascapular nerve was transected. For the 6 sheep in the neurectomy/tenotomy (N/T) group, neurectomy was performed, and the infraspinatus was tenotomized 8 weeks later. All sheep were sacrificed after 16 weeks. Magnetic resonance imaging (MRI) was performed before the first surgery (baseline) and then after 8 and 16 weeks. The MRI data were used to assess muscle volume, fat fraction, musculotendinous retraction, pennation angle, and muscle fiber length of the infraspinatus muscle. Results: Three sheep (2 in the T/N and 1 in the N/T group) had to be excluded because the neurectomy was incomplete. After 8 weeks, muscle volume decreased significantly less in the T/N group (73% ± 2% of initial volume vs 52% ± 7% in the N/T group; P < .001). After 16 weeks, the mean intramuscular fat increase was higher in the T/N group (36% ± 9%) than in the N/T group (23% ± 6%), without reaching significance ( P = .060). After 16 weeks, the muscle volumes of the N/T (52% ± 8%) and T/N (49% ± 3%) groups were the same ( P = .732). Conclusion: Secondary neurectomy after tenotomy of a musculotendinous unit increases muscle atrophy. Tenotomy of a denervated muscle is associated with substantial myotendinous retraction but not with an increase of fatty infiltration to the level of the tenotomy first group. Clinical Relevance: Substantial retraction, which is associated with hitherto irrecoverable fatty infiltration, should be prevented, and additional neurogenic injury during repair should be avoided to limit the development of further atrophy.

Suppression of Pain in the Late Phase of Chronic Trigeminal Neuropathic Pain Failed to Rescue the Decision-Making Deficits in Rats

Trigeminal neuropathic pain (TNP) led to vital cognitive functional deficits such as impaired decision-making abilities in a rat gambling task. Chronic TNP caused hypomyelination in the anterior cingulate cortex (ACC) associated with decreased synchronization between ACC spikes and basal lateral amygdala (BLA) theta oscillations. The aim of this study was to investigate the effect of pain suppression on cognitive impairment in the early or late phases of TNP. Blocking afferent signals with a tetrodotoxin (TTX)-ELVAX implanted immediately following nerve lesion suppressed the allodynia and rescued decision-making deficits. In contrast, the TTX used at a later phase could not suppress the allodynia nor rescue decision-making deficits. Intra-ACC administration of riluzole reduced the ACC neural sensitization but failed to restore ACC-BLA spike-field phase synchrony during the late stages of chronic neuropathic pain. Riluzole suppressed allodynia but failed to rescue the decision-making deficits during the late phase of TNP, suggesting that early pain relief is important for recovering from pain-related cognitive impairments. The functional disturbances in ACC neural circuitry may be relevant causes for the deficits in decision making in the chronic TNP state.

Toll-Like Receptor 9-Mediated Neuronal Innate Immune Reaction Is Associated with Initiating a Pro-Regenerative State in Neurons of the Dorsal Root Ganglia Non-Associated with Sciatic Nerve Lesion

One of the changes brought about by Wallerian degeneration distal to nerve injury is disintegration of axonal mitochondria and consequent leakage of mitochondrial DNA (mtDNA)—the natural ligand for the toll-like receptor 9 (TLR9). RT-PCR and immunohistochemical or Western blot analyses were used to detect TLR9 mRNA and protein respectively in the lumbar (L4-L5) and cervical (C7-C8) dorsal root ganglia (DRG) ipsilateral and contralateral to a sterile unilateral sciatic nerve compression or transection. The unilateral sciatic nerve lesions led to bilateral increases in levels of both TLR9 mRNA and protein not only in the lumbar but also in the remote cervical DRG compared with naive or sham-operated controls. This upregulation of TLR9 was linked to activation of the Nuclear Factor kappa B (NFκB) and nuclear translocation of the Signal Transducer and Activator of Transcription 3 (STAT3), implying innate neuronal immune reaction and a pro-regenerative state in uninjured primary sensory neurons of the cervical DRG. The relationship of TLR9 to the induction of a pro-regenerative state in the cervical DRG neurons was confirmed by the shorter lengths of regenerated axons distal to ulnar nerve crush following a previous sciatic nerve lesion and intrathecal chloroquine injection compared with control rats. The results suggest that a systemic innate immune reaction not only triggers the regenerative state of axotomized DRG neurons but also induces a pro-regenerative state further along the neural axis after unilateral nerve injury.