Diaphragmatic Paralysis Research Articles

Diaphragmatic Paralysis Following Chest Tube Insertion in an Infant

Diaphragmatic paralysis (DP) can occur due to central nervous system pathology or peripheral nerve injury. Direct injury to the phrenic nerve after intercostal chest drain (ICD) insertion for treatment of pneumothorax is an infrequent complication. We present a 4-month-old baby, ex-preterm 27 weeks, who was admitted to a tertiary care hospital pediatric intensive care unit in Muscat, Oman, in 2023 with severe respiratory syncytial virus bronchiolitis and required intubation and mechanical ventilation (MV). His illness was complicated by right-side pneumothorax that required ICD insertion. Post-extubation, he had persistent tachypnea with the inability to be weaned from noninvasive ventilation (NIV). Chest x-ray (CXR) and fluoroscopy showed a high right diaphragm dome with paradoxical movements. He improved dramatically after the plication of the right diaphragm and was discharged home on the 9th day after the plication.

The early results of minimally invasive surgery throught the right axillary approach for the treatment of ventricular septal defect in childrent under 6 months old

Objective: this study to evaluate the characteristics of the lesions as well as the early results of minimally invasive surgery through the right axillary approach for the treatment of ventricular septal defect in children under 6 months old Summary: Ventricular septal defect is the most common congenital heart disease, accounting for about 25%. Surgical repair is indicated when the patient has symptoms of heart failure, poor weight gain or recurrent pneumonia; echocardiography demonstrates a large defect or one located in a position that cannot be self-closed (below the aortic valve, infundibular position). Nowadays, with the development of anesthesia and surgical techniques, most ventricular septal defects are surgically treated through minimally invasive procedures. However, in children under 6 months of age, especially newborns with low birth weight, minimally invasive surgery in the treatment of ventricular septal defects is still a challenge in clinical practice. We conducted this study to evaluate the characteristics of the lesions as well as the early results of minimally invasive surgery through the right axillary approach for the treatment of ventricular septal defect in children under 6 months old at the Cardiovascular Center - E Hospital in the period of 2022 - 2023. Study subjects and methods: descriptive study. From October 2022 to December 2023, 62 patients who were under 6 months of age with ventricular septal defect underwent minimally invasive surgery through the right axillary approach, 27 males and 35 females, average age 3 months, average weight 4.8 kg. The average diameter was 7.4 mm, severe pulmonary hypertension in 27 patients (42.9%). Results: average CPB and cross-clamping aortic time were 68 minutes and 46 minutes, respectively . No patient required sternotomy. Average ventilator time was 30 hours, hospital stay was 15 days. No incidence of fatality. Early postoperative complications included: temporary arrhythmia (4 patients), postoperative bleeding (1 patient), cerebrovascular accident (2 patients), superior vena cava stenosis (1 patient), diaphragmatic paralysis (1 patient), chylous effusion (1 patient). Postoperative echocardiography: closed ventricular septal defect in 55 patients (88.7%), residual permeable shunt in 7 patients with small residual shunt with out reoperation. Postoperative pulmonary hypertension decreased or disappeared in most patients, only 1 patient still had severe postoperative pulmonary hypertension. Conclusion: minimally invasive surgery via the right axillary approach to treat ventricular septal defect in children under 6 months of age is feasible and brings positive early results.

Diaphragmatic Palsy Due to a Paraneoplastic Autoimmune Syndrome Revealed by Checkpoint Inhibitors

Background and Clinical Significance: Immune checkpoint inhibitors (ICIs) have revolutionized cancer treatment but may underlie diverse and potentially life-threatening immune-related adverse events (irAEs). They may cause various conditions leading to respiratory failure, including myasthenic syndromes and myositis. However, diaphragmatic paralysis (DP) has rarely been reported. To describe patients with diaphragmatic paralysis in a pharmacovigilance registry, we searched the prospective REISAMIC registry at the Gustave Roussy Cancer Center (Villejuif, France) for cases of diaphragmatic palsy (DP) occurring from September 2014 to December 2021. Case Presentation: We identified three patients, in whom DP was confirmed by diaphragmatic ultrasonography, pulmonary function tests, and/or diaphragmatic electroneuromyogram. Diaphragmatic palsy was life-threatening in all patients, as it caused respiratory failure requiring mechanical ventilation. In all cases, a pre-existing subclinical paraneoplastic syndrome was detected. Onconeural antibodies (anti-titin and anti-VGCC) were detected in these patients before and after the initiation of ICI therapy, suggesting a mixed paraneoplastic syndrome with features overlapping those of myasthenic syndrome (myasthenia gravis in one patient and Lambert–Eaton syndrome in another) and myositis. Conclusions: Diaphragmatic palsy is a severe irAE potentially resulting from different mechanisms, including myositis and neuromuscular junction involvement (myasthenia gravis, Lambert–Eaton). Antineuronal antibodies associated with such conditions were already present in our patients prior to immunotherapy initiation, suggesting ICIs could trigger flare-ups of pre-existing silent paraneoplastic autoimmune conditions.

Lung ultrasound in neonates under cardiac surgery: feasible and predictive.

To determine whether pre- and postoperative follow-up based on lung ultrasound is associated with the respiratory and clinical evolution of patients undergoing cardiac surgery in the neonatal period. Prospective observational unicentric study from December 2020 to October 2023 in a neonatal intensive care unit, a referral center for congenital heart diseases (CHD). Neonates with CHD exposed to heart surgery or percutaneous catheterization in their first 28days of life were included. LU follow-up was performed before surgery (LUSpre) and on days 1 (LUS_1), 3 (LUS_3), and 7 (LUS_7) afterwards by mean of a dedicated score (LUS) ranging from 0 to 3 points in 8 areas (total score 0-24). Fifty-five neonates were included. Median gestational age was 39.1weeks (37.8-40.1), birth weight 3088g (IQR 2910-3400). Forty-nine received surgery and 6 only percutaneous catheterization. Median LUSpre score was associated with total respiratory support in the first 30 postoperative days (p = 0.034). Median postoperative LUS was significantly higher than LUSpre in the surgery cohort at all time points (p < 0.05). LUS_1 was associated with respiratory and several clinical outcomes: for each point increase in the ultrasound score, the days on invasive mechanical ventilation, the need for any respiratory support within the first 30 postoperative days, and the length of NICU stay increased significantly (p < 0.05). The presence of consolidations in any area in the postoperative lung ultrasounds was associated with worse respiratory outcomes: higher invasive mechanical ventilation duration (6.84days), longer total respiratory support (6.07days), and NICU admission (21.61days). The presence of consolidations in LUS_7 was significantly associated with the occurrence of ipsilateral diaphragmatic paralysis (odds ratio of 10.25 (95% CI 2.05-51.26, p = 0.006). Performance of lung ultrasound follow-up in CHD in the NICU is feasible and predictive of the respiratory evolution of the patient. LUS_1 presented the highest predictive values. The presence of consolidations is associated with a worse respiratory evolution and if they persist for a week after the procedure, it may raise suspicion of ipsilateral diaphragmatic paralysis.

Diagnostic Strategy in Idiopathic Diaphragmatic Paralysis

Unilateral diaphragmatic paralysis is a medical condition characterized by the impairment of either the right or left hemidiaphragm, resulting in an inability to contract effectively during inspiration. This condition may arise due to intrinsic diaphragmatic muscle dysfunction or a disruption in the neural input from the phrenic nerve to the affected hemidiaphragm. The etiology is diverse, with clinical manifestations varying from an absence of symptoms to severe respiratory compromise. This case study aims to review the assessment and management of unilateral diaphragmatic paralysis, highlighting the role of dynamic imaging techniques, such as diaphragmatic ultrasound, in the diagnosis, evaluation, and ongoing monitoring of patients with this condition.

Diaphragm Muscle Atrophy Contributes to Low Physical Capacity in COVID-19 Survivors.

Fatigue and dyspnea are the most commonly reported long-term complaints in individuals previously infected with SARS-CoV-2. This study aimed to comprehensively evaluate diaphragm muscle function in post-COVID-19 patients and investigate whether potential diaphragm dysfunction contributes to physical functioning impairment. A total of 46 patients who qualified for pulmonary rehabilitation were examined. Diaphragm muscle function parameters were evaluated using ultrasonography, while the severity of dyspnea, aerobic capacity, and the amount of energy used by the body during physical activity were assessed using the six-minute walk test, mMRC scale, and Metabolic Equivalent Task (MET), respectively. We identified that 69.5% of patients had diaphragm atrophy and 6.5% had diaphragm paralysis. The percentage of atrophy was not related to age, gender, BMI, oxygen therapy usage during the COVID-19 infection course, and disease severity. Patients who experienced cough, fever, and no loss of smell during the COVID-19 course had significantly greater diaphragm inspiratory thickness values, while patients with cough and no smell disorders had a significantly lower percentage of diaphragm atrophy. Diaphragm functional parameters were strongly associated with selected variables of exercise tolerance, such as distance in the six-minute walk test, oxygen saturation levels, fatigue, and exertion on the Borg scale. In conclusion, diaphragm muscle dysfunction is a serious long-term post-COVID-19 consequence and can be viewed as a major contributing factor to prolonged functional impairments.

To study the relation of volume of local anaesthetic and diaphragmatic motility in ultrasound guided supraclavicular brachial plexus block

Supraclavicular brachial plexus block is a valuable technique for upper limb surgeries, but it carries the risk of hemi diaphragmatic paresis due to phrenic nerve involvement, which can limit its utility. Thirty-six patients undergoing forearm and hand surgery received ultrasound-guided supraclavicular brachial plexus blocks with varying volumes of 0.5% ropivacaine, determined by Dixon and Massey's up-and-down approach starting at 25 ml. We assessed diaphragmatic paralysis/paresis incidence and spirometry parameters across different volumes to optimize clinical outcomes. Among the patients, 15 ml of 0.5% ropivacaine consistently provided effective surgical anesthesia without causing diaphragmatic paralysis or paresis. The study showed no significant changes in spirometry parameters such as FEV1 and FVC with lower volumes, while higher volumes correlated with increased diaphragmatic impairment. Reducing the volume of 0.5% ropivacaine mitigates the risk of diaphragmatic paralysis associated with supraclavicular brachial plexus blocks, ensuring safe and effective anesthesia for upper limb surgeries.

Ultrasound guided supraclavicular block versus combined infraclavicular and Suprascapular block: A randomized controlled trial

The infraclavicular block (ICB) can avoid some of the side effects of the supraclavicular block (SCB) like hemi-diaphragmatic palsy. This study aimed to analyze the comparative efficacy of supraclavicular block versus combined infraclavicular block and suprascapular block.Patients undergoing upper limb surgery under general anaesthesia were randomized into group S (to receive supraclavicular brachial plexus block) and group I (to receive infraclavicular brachial plexus block and suprascapular nerve block). Onset times and the duration of both sensory and motor block was noted in both the groups. Postoperative pain as assessed by NRS score and total fentanyl requirement was noted for 24 hours. : The group S showed a significantly faster onset of both sensory (8.47±3.12) vs. 13.75±4.69; p&amp;#60;0.001) and motor blocks (15.56±5.32 vs. 24.17±5.67; p&amp;#60;0.001). The duration of sensory block was significantly greater in the group I, with no significant difference in the duration of motor block.We also noted hemi diaphragmatic paresis (27.8%) and paralysis (8.3%) only in the SCB group.For the patients undergoing upper limb surgeries, the use of ICB+SSB block as compared to the SCB block resulted in increased duration of sensory block; however, the fentanyl consumption was not significantly reduced.

Clinically relevant mouse models of severe spinal muscular atrophy with respiratory distress type 1.

Spinal Muscular Atrophy with Respiratory Distress (SMARD1) is a lethal infantile disease, characterized by the loss of motor neurons leading to muscular atrophy, diaphragmatic paralysis, and weakness in the trunk and limbs. Mutations in IGHMBP2, a ubiquitously expressed DNA/RNA helicase, have been shown to cause a wide spectrum of motor neuron disease. Though mutations in IGHMBP2 are mostly associated with SMARD1, milder alleles cause the axonal neuropathy, Charcot-Marie-Tooth disease type 2S (CMT2S), and some null alleles are potentially a risk factor for sudden infant death syndrome (SIDS). Variant heterogeneity studied using an allelic series can be informative in order to create a broad spectrum of models that better exhibit the human variation. We previously identified the nmd2J mouse model of SMARD1, as well as two milder CMT2S mouse models. Here, we used CRISPR-Cas9 genome editing to create three new, more severe Ighmbp2 mouse models of SMARD1, including a null allele, a deletion of C495 (C495del) and a deletion of L362 (L362del). Phenotypic characterization of the IGHMBP2L362del homozygous mutants and IGHMBP2C495del homozygous mutants respectively show a more severe disease presentation than the previous nmd2J model. The IGHMBP2L362del mutants lack a clear denervation in the diaphragm while the IGHMBP2C495del mutants display a neurogenic diaphragmatic phenotype as observed in SMARD1 patients. Characterization of the Ighmbp2-null model indicated neo-natal lethality (median lifespan = 0.5days). These novel strains expand the spectrum of SMARD1 models to better reflect the clinical continuum observed in the human patients with various IGHMBP2 recessive mutations.

An Implantable Self-Driven Diaphragm Pacing System Based on a Microvibration Triboelectric Nanogenerator for Phrenic Nerve Stimulation.

Spinal cord injury poses considerable challenges, particularly in diaphragm paralysis. To address limitations in existing diaphragm pacing technologies, we report an implantable, self-driven diaphragm pacing system based on a microvibration triboelectric nanogenerator (MV-TENG). Leveraging the efficient MV-TENG, the system harvests micromechanical energy and converts this energy into pulses for phrenic nerve stimulation. In vitro tests confirm a stable MV-TENG output, while subcutaneous implantation of the device in rats results in a constant amplitude over 4 weeks with remarkable energy-harvesting efficacy. The system effectively induces diaphragmatic motor-evoked potentials, triggering contractions of the diaphragm. This proof-of-concept system has potential clinical applications in implantable phrenic nerve stimulation, presenting a novel strategy for advancing next-generation diaphragm pacing devices.

Investigation of diaphragmatic motion and projected lung area in diaphragm paralysis patients using dynamic chest radiography.

Dynamic chest radiography (DCR) is a novel and supplementary examination in respiratory diseases. The investigation of other chest diseases using DCR has been explored, identifying a certain correlation of the pulmonary function test (PFT). However, there is a lack of research using DCR parameters to quantitatively evaluate chest disease. The purpose of this study was to investigate the diagnostic value of DCR for diaphragm paralysis (DP). This retrospective study recruited 118 participants, which include 18 patients with DP, 48 healthy volunteers, and 52 patients with respiratory disease. Comparison of DCR parameters relationships among 3 groups was performed using one-way analysis of variance (ANOVA) and Kruskal-Wallis test. The receiver operating characteristic (ROC) curve was used to compare the value of the DCR parameters to diagnose DP. The differences of excursion of diaphragm (ED) in normal (nb) and forced breathing (fb), ED(fb)-ED(nb), and the parameters of projected lung area (PLA) in inspiratory (ins) and expiratory phase (exp), PLA.exp(fb), PLA.ins(fb)-PLA.ins(nb), and PLA.exp(fb)-PLA.exp(nb) among the 3 groups were statistically significant. The highest area under the curve (AUC) of right-side parameter was the ED(fb)-ED(nb), for which the AUC was 0.8950 [95% confidence interval (CI): 0.7618-1.000], whereas that of the left-side parameter was ED(fb), for which the AUC was 0.9176 [95% confidence interval (CI): 0.8524-0.9829]. The parameters of DCR have good diagnostic value for DP. The highest diagnostic efficiency for DP on the right side is the ED(fb)-ED(nb), with a sensitivity of 95% and a specificity of 78.6%, whereas on the left side is ED(fb), with a sensitivity of 80% and a specificity of 88.2%.

Dynamic process of forced breathing in a patient with right diaphragm paralysis.

Dynamic process of forced breathing in a patient with right diaphragm paralysis.

Clavipectoral fascial plane block for clavicle fracture surgery: a case report.

Regional anaesthesia can be an attractive alternative anaesthetic approach in clavicle surgery, but it requires the peripheral block of multiple cervical and brachial nerves that transmit nociceptive information. Deep cervical plexus blocks, as paravertebral nerve block, can lead to severe side effects, such as unilateral diaphragmatic paralysis. A 66-year-old male patient, American Society of Anesthesiologists physical status III, was scheduled for open reduction and internal fixation of the right clavicle with plates and screws after a high-energy trauma. Pre-anaesthetic evaluation revealed right hemopneumothorax and bilateral rib fractures. We decided to perform regional anaesthesia (superficial cervical plexus block and clavipectoral fascial plane block), combined with dexmedetomidine perfusion to avoid invasive mechanical ventilation and prevent additional pulmonary complications. The surgical procedure was successfully completed without any further anaesthesia requirements. The patient remained comfortable during the postoperative period. Regional anaesthesia for clavicle surgeries has the advantage of promoting non-opioid free anaesthesia. Effective pain control enhances patient satisfaction and reduces the length of stay in hospital. In our case report, a combined superficial cervical plexus block and clavipectoral fascial plane block was a safe and effective regional anaesthetic approach.

Weaning failure due to isolated residual diaphragmatic paralysis after cervical spinal cord ischemia following aortic surgery- a case report

BackgroundBilateral diaphragmatic dysfunction can lead to dyspnea and recurrent respiratory failure. In rare cases, it may result from high cervical spinal cord ischemia (SCI) due to anterior spinal artery syndrome (ASAS). We present a case of a patient experiencing persistent isolated diaphragmatic paralysis after SCI at level C3/C4 following thoracic endovascular aortic repair (TEVAR) for Kommerell’s diverticulum. This is, to our knowledge, the first documented instance of a patient fully recovering from tetraplegia due to SCI while still exhibiting ongoing bilateral diaphragmatic paralysis.Case presentationThe patient, a 67-year-old male, presented to the Vascular Surgery Department for surgical treatment of symptomatic Kommerell’s diverticulum in an aberrant right subclavian artery. After successful surgery in two stages, the patient presented with respiratory insufficiency and flaccid tetraparesis consistent with anterior spinal artery syndrome with maintained sensibility of all extremities. A computerized tomography scan (CT) revealed a high-grade origin stenosis of the left vertebral artery, which was treated by angioplasty and balloon-expandable stenting. Consecutively, the tetraparesis immediately resolved, but weaning remained unsuccessful requiring tracheostomy. Abdominal ultrasound revealed a residual bilateral diaphragmatic paralysis. A repeated magnetic resonance imaging (MRI) 14 days after vertebral artery angioplasty confirmed SCI at level C3/C4. The patient was transferred to a pulmonary clinic with weaning center for further recovery.ConclusionsThis novel case highlights the need to consider diaphragmatic paralysis due to SCI as a cause of respiratory failure in patients following aortic surgery. Diaphragmatic paralysis may remain as an isolated residual in these patients.

Overlap of Chilaiditi syndrome and diaphragmatic paralysis: a rare case.

Overlap of Chilaiditi syndrome and diaphragmatic paralysis: a rare case.

Diaphragmatic paralysis after pediatric cardiac surgery: Associated implications and outcomes

Diaphragmatic paralysis after pediatric cardiac surgery: Associated implications and outcomes

Analysis of Risk Factors of Difficult Weaning from Mechanical Ventilation after Pediatric Cardiac Surgery: A Single Center Prospective Study

Abstract Background Weaning from mechanical ventilation (MV( and timing of extubation are crucial components in the postoperative management of cardiac surgery as altered respiratory mechanics and positive pressure ventilation may have significant influence on hemodynamics. Aim: To evaluate risk factors for failure of weaning from mechanical ventilation after pediatric cardiac surgery and to assess the frequency of phrenic nerve injury. Methodology This Cohort study included medical records of 101 children admitted consecutively to Pediatric post-cardiac surgery ICU in Academy of Cardiovascular surgery in Ain Shams university Hospitals between April, 2020 and April, 2021, who had undergone heart surgery. The patients were divided into two groups : - successefully weaned group. - Difficult to wean group. Diaphragmatic ultrasound was done for every difficult weaning patient to assess diaphragmatic paralysis. Result: Age (P &amp;lt; 0.001), Weight (P &amp;lt; 0.001), volum intake (P &amp;lt; 0.001), systolic blood pressure (P = 0.017), Diastolic blood pressure (P = 0.004), were significantly lower in patients who showed difficult weaning compared to patients with successful weaning. Furthermore operation time (P &amp;lt; 0.001), use of noradrenaline (P = 0.019), use of adrenaline ( P = 0.017), use of Milirinon ( P = 0.003), respiratory rate ( P = 0.003), inotropic support (P = 0.001), positive fluid balance (P &amp;lt; 0.001), heart failure, renal failure, Pulmonary complications, need of pace maker, sepsis ( P &amp;lt; 0.001), diaphragmatic paralysis ( P &amp;lt; 0.001), transposition of great arteries operations ( P = 0.009), were significantly higher in patients who showed difficult weaning compared to patients with successful weaning. While use of dobutamine, discharge with open chest, reoperation, transfusion &amp;gt; 50 ml / kg, urine output, reoperation bleeding and any operation other than atrial septal defect, transposition of great arteries all did not affect weaning difficulty. Conclusion younger age, operation time, as well as sepsis were the best predictors for difficulty of weaning.

Diaphragmatic palsy following lung transplantation.

Diaphragmatic palsy after lung transplantation has been reported infrequently. Given the role of the diaphragm in respiration, the palsy may play a significant role in the post-surgical recovery as well as morbidity and mortality. This review summarises the current literature to better understand diaphragmatic palsy in the post lung-transplant setting among adults. A thorough literature search was conducted through multiple databases and 91 publications were identified that fit the research question. The review aimed to report the burden of this problem, explore different modalities of diagnosis reported, the effect of various clinical factors and treatment modalities, as well as their effects on outcomes. Additionally, it aimed to highlight the variability, limitations of reported data, and the absence of a standardised approach. This review emphasises the crucial need for more dedicated research to better address this clinical challenge.

Ultrasound assessment of diaphragmatic dysfunction in non-critically ill patients: relevant indicators and update.

Diaphragm dysfunction (DD) can be classified as mild, resulting in diaphragmatic weakness, or severe, resulting in diaphragmatic paralysis. Various factors such as prolonged mechanical ventilation, surgical trauma, and inflammation can cause diaphragmatic injury, leading to negative outcomes for patients, including extended bed rest and increased risk of pulmonary complications. Therefore, it is crucial to protect and monitor diaphragmatic function. Impaired diaphragmatic function directly impacts ventilation, as the diaphragm is the primary muscle involved in inhalation. Even unilateral DD can cause ventilation abnormalities, which in turn lead to impaired gas exchange, this makes weaning from mechanical ventilation challenging and contributes to a higher incidence of ventilator-induced diaphragm dysfunction and prolonged ICU stays. However, there is insufficient research on DD in non-ICU patients, and DD can occur in all phases of the perioperative period. Furthermore, the current literature lacks standardized ultrasound indicators and diagnostic criteria for assessing diaphragmatic dysfunction. As a result, the full potential of diaphragmatic ultrasound parameters in quickly and accurately assessing diaphragmatic function and guiding diagnostic and therapeutic decisions has not been realized.

Parsonage-Turner Syndrome and SARS-CoV-2 Infection: A Literature Review With Case Presentation.

Neuralgic amyotrophy, also known as Parsonage-Turner syndrome (PTS), is characterized by severe pain and muscle wasting affecting the anterior body, including the head, shoulder, upper limb, and chest wall. Often triggered by an antecedent event, such as infection, PTS encompasses various conditions historically identified as separate entities. In 1948, Parsonage and Turner unified these conditions under the term neuralgic amyotrophy based on shared features of intense pain and muscular atrophy. Recent studies have highlighted PTS as a spectrum disorder with diverse manifestations, including pure sensory neuropathy, extensive neuropathy, spinal accessory nerve involvement, and diaphragmatic palsy. We reviewed 26 documented cases of PTS following SARS-CoV-2 infection, emphasizing the importance of considering PTS in individuals with a history of COVID-19 due to varied clinical presentations. Standardized diagnostic methods and comprehensive evaluations are crucial for accurate diagnosis and management. Future research should focus on consistent evaluation methods and employing a comprehensive differential diagnosis approach.