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Journal of Intensive Care Medicine Aug 2023Prone position ventilation (PPV) is one of the few interventions with a proven mortality benefit in the management of acute respiratory distress syndrome (ARDS), yet it... (Review)
Review
Prone position ventilation (PPV) is one of the few interventions with a proven mortality benefit in the management of acute respiratory distress syndrome (ARDS), yet it is underutilized as demonstrated by multiple large observational studies. Significant barriers to its consistent application have been identified and studied. But the complex interplay of a multidisciplinary team makes its consistent application challenging. We present a framework of multidisciplinary collaboration that identifies the appropriate patients for this intervention and discuss our institutional experience applying a multidisciplinary team to implement prone position (PP) leading up to and through the current COVID-19 pandemic. We also highlight the role of such multidisciplinary teams in the effective implementation of prone positioning in ARDS throughout a large health care system. We emphasize the importance of proper selection of patients and provide guidance on how a protocolized approach can be utilized for proper patient selection.
Topics: Humans; COVID-19; Prone Position; Pandemics; Respiratory Distress Syndrome; Respiration, Artificial; Patient Positioning
PubMed: 36883212
DOI: 10.1177/08850666231162566 -
Critical Care (London, England) Nov 2023Pulse pressure and stroke volume variation (PPV and SVV) have been widely used in surgical patients as predictors of fluid challenge (FC) response. Several factors may... (Meta-Analysis)
Meta-Analysis
BACKGROUND
Pulse pressure and stroke volume variation (PPV and SVV) have been widely used in surgical patients as predictors of fluid challenge (FC) response. Several factors may affect the reliability of these indices in predicting fluid responsiveness, such as the position of the patient, the use of laparoscopy and the opening of the abdomen or the chest, combined FC characteristics, the tidal volume (Vt) and the type of anesthesia.
METHODS
Systematic review and metanalysis of PPV and SVV use in surgical adult patients. The QUADAS-2 scale was used to assess the risk of bias of included studies. We adopted a metanalysis pooling of aggregate data from 5 subgroups of studies with random effects models using the common-effect inverse variance model. The area under the curve (AUC) of pooled receiving operating characteristics (ROC) curves was reported. A metaregression was performed using FC type, volume, and rate as independent variables.
RESULTS
We selected 59 studies enrolling 2,947 patients, with a median of fluid responders of 55% (46-63). The pooled AUC for the PPV was 0.77 (0.73-0.80), with a mean threshold of 10.8 (10.6-11.0). The pooled AUC for the SVV was 0.76 (0.72-0.80), with a mean threshold of 12.1 (11.6-12.7); 19 studies (32.2%) reported the grey zone of PPV or SVV, with a median of 56% (40-62) and 57% (46-83) of patients included, respectively. In the different subgroups, the AUC and the best thresholds ranged from 0.69 and 0.81 and from 6.9 to 11.5% for the PPV, and from 0.73 to 0.79 and 9.9 to 10.8% for the SVV. A high Vt and the choice of colloids positively impacted on PPV performance, especially among patients with closed chest and abdomen, or in prone position.
CONCLUSION
The overall performance of PPV and SVV in operating room in predicting fluid responsiveness is moderate, ranging close to an AUC of 0.80 only some subgroups of surgical patients. The grey zone of these dynamic indices is wide and should be carefully considered during the assessment of fluid responsiveness. A high Vt and the choice of colloids for the FC are factors potentially influencing PPV reliability.
TRIAL REGISTRATION
PROSPERO (CRD42022379120), December 2022. https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=379120.
Topics: Adult; Humans; Blood Pressure; Hemodynamics; Stroke Volume; Operating Rooms; Reproducibility of Results; Colloids; Fluid Therapy; ROC Curve
PubMed: 37940953
DOI: 10.1186/s13054-023-04706-0 -
BMC Pulmonary Medicine Jul 2023Awake prone positioning (APP) is a recommended therapy for non-intubated ARDS patients, but adherence can be challenging. Understanding the barriers and facilitators of...
BACKGROUND
Awake prone positioning (APP) is a recommended therapy for non-intubated ARDS patients, but adherence can be challenging. Understanding the barriers and facilitators of adherence to APP is essential to increase the adherence of therapy and improve patient outcomes. The objective of this study was to explore the barriers and facilitators of adherence to awake prone ventilation using a qualitative approach and the Capability, Opportunity, Motivation-Behavior (COM-B) model.
METHODS
Semi-structured, in-depth interviews were conducted with patients involved in awake prone ventilation. Data were analyzed using an adapted inductive thematical approach and mapped onto the COM-B model to identify barriers and facilitators to adherence of APP.
RESULTS
Nineteen patients were interviewed (aged 55-92 years). Fifteen themes were identified and mapped directly on to the six COM-B constructs, with "physical challenges" related to physical capability being the primary barrier. These COM-B sub-items reflected five other barriers, including low self-efficacy(M), treatment environment(O), availability of time(O), misconceptions about the treatment(C), and insufficient knowledge(C). Key facilitators in adhering to APP were ability to identify and overcome obstacles(C), availability and affordability of treatment(O), family influences(O), beliefs and trust in treatment(M), fear about the disease(M), and perceived benefits(M). In addition, three factors played the role of both facilitator and barrier, such as media influences(O), healthcare influences(O), and behavioral habits(M).
CONCLUSION
The COM-B model was proved to be a useful framework for identifying the barriers and facilitators of adherence to awake prone ventilation. The findings suggest that adherence behavior is a dynamic and balanced process and interventions aimed at improving adherence to APP should address the barriers related to capability, opportunity, and motivation. Healthcare providers should focus on providing proper guidance and training, creating a comfortable environment, and offering social support to improve patients' capability and opportunity. Additionally, promoting patients' positive beliefs and attitudes towards the treatment and addressing misconceptions and fears can further enhance patients' motivation to adhere to the treatment plan.
Topics: Humans; Wakefulness; Motivation; Prone Position; Qualitative Research; Health Personnel
PubMed: 37468848
DOI: 10.1186/s12890-023-02561-x -
Journal of Wound, Ostomy, and...The purpose of this quality improvement (QI) initiative was to evaluate the effects of a repositioning intervention bundle on the occurrences and severity of...
PURPOSE
The purpose of this quality improvement (QI) initiative was to evaluate the effects of a repositioning intervention bundle on the occurrences and severity of hospital-acquired pressure injuries (HAPIs) of the face in patients with COVID-19-related acute respiratory distress syndrome (ARDS) managed by ventilation and placed in a prone position.
PARTICIPANTS AND SETTING
Eighteen critically ill, ventilated patients were placed in a prone position for extended periods (range, 1-13 days). The study setting was critical care units in a 504-bed nonprofit teaching hospital located in the Northeastern United States.
APPROACH
Standard of care for the prevention of pressure injury (PI) in ventilated patients placed in a prone position at our facility included use of foam dressings over bony prominences on the face and the application of tape to secure the endotracheal (ET) tube as compared to commercial ET tube securement devices. We also placed a fluidized pillow with pillowcase wrapped with an absorbent pad under the head to absorb secretions. We added 2 interventions to our facility's existing HAPI prevention bundle. The first was a repositioning strategy; ventilated and prone patients were lifted by their shoulders by critical care RNs while their ET tube was stabilized by a respiratory therapist every 6 hours. The RNs then repositioned the patient's head and arms to the opposite side into a swimmer's position (head lying to the side with one cheek in contact with the fluidized pillow). The second intervention was micromovement of the head performed by an RN every 4 hours.
OUTCOMES
Prior to implementation of the QI initiative, data collected during the early pandemic demonstrated that multiple patients developed facial PIs secondary to prone positioning; a majority were full-thickness or unstageable PIs, whereas a minority were partial-thickness PIs (stage 2). Following implementation of the QI initiative, data indicated that 5 of 18 (28%) patients placed in a prone position had HAPIs of the face; 4 (22%) of the HAPIs were stage 1 or 2 and 1 was unstageable. Patients were placed in a prone position from 1 to 13 days. All facial HAPIs developed within the first 2 days of placement in a prone position.
IMPLICATIONS FOR PRACTICE
The addition of an RN and a respiratory therapist repositioning intervention and micromovements of the head every 4 hours by the RN to an existing pressure prevention bundle during prone positioning led to a clinically relevant reduction in the severity of facial HAPIs. As a result, care for these patients has been changed to incorporate the repositioning interventions implemented during this QI project.
Topics: Humans; Prone Position; Pressure Ulcer; Intensive Care Units; Respiratory Distress Syndrome; Hospitals
PubMed: 37966074
DOI: 10.1097/WON.0000000000001025 -
Medicina (Kaunas, Lithuania) Nov 2023: Supine-to-prone hypotension is caused by increased intrathoracic pressure and decreased venous return in the prone position. Dynamic arterial elastance (Ea) indicates... (Observational Study)
Observational Study
: Supine-to-prone hypotension is caused by increased intrathoracic pressure and decreased venous return in the prone position. Dynamic arterial elastance (Ea) indicates fluid responsiveness and can be used to predict hypotension. This study aimed to investigate whether Ea can predict supine-to-prone hypotension. : In this prospective, observational study, 47 patients who underwent elective spine surgery in the prone position were enrolled. Supine-to-prone hypotension is defined as a decrease in Mean Arterial Pressure (MAP) by more than 20% in the prone position compared to the supine position. Hemodynamic parameters, including systolic blood pressure (SAP), diastolic blood pressure, MAP, stroke volume variation (SVV), pulse pressure variation (PPV), stroke volume index, cardiac index, dP/dt, and hypotension prediction index (HPI), were collected in the supine and prone positions. Supine-to-prone hypotension was also assessed using two different definitions: MAP < 65 mmHg and SAP < 100 mmHg. Hemodynamic parameters were analyzed to determine the predictability of supine-to-prone hypotension. : Supine-to-prone hypotension occurred in 13 (27.7%) patients. Ea did not predict supine-to-prone hypotension [Area under the curve (AUC), 0.569; = 0.440]. SAP > 139 mmHg (AUC, 0.760; = 0.003) and dP/dt > 981 mmHg/s (AUC, 0.765; = 0.002) predicted supine-to-prone hypotension. MAP, SAP, PPV, and HPI predicted MAP <65 mm Hg. MAP, SAP, SVV, PPV, and HPI predicted SAP < 100 mm Hg. : Dynamic arterial elastance did not predict supine-to-prone hypotension in patients undergoing spine surgery. Systolic arterial pressure > 139 mmHg and dP/dt > 981 mmHg/s in the supine position were predictors for supine-to-prone hypotension. When different definitions were employed (mean arterial pressure < 65 mmHg in the prone position or systolic arterial pressure < 100 mmHg in the prone position), low blood pressures in the supine position were related to supine-to-prone hypotension.
Topics: Humans; Prospective Studies; Hypotension; Blood Pressure; Hemodynamics; Stroke Volume
PubMed: 38138152
DOI: 10.3390/medicina59122049 -
BMC Pulmonary Medicine Dec 2023Prone position is an option for rescue therapy for acute respiratory distress syndrome. However, there are limited relevant data among trauma and surgical patients, who... (Meta-Analysis)
Meta-Analysis
BACKGROUND
Prone position is an option for rescue therapy for acute respiratory distress syndrome. However, there are limited relevant data among trauma and surgical patients, who may be at increased risk for complications following position changes. This study aimed to identify the benefits and risks of proning in this patient subgroup.
METHODS
Follow the PRISMA 2020, MEDLINE and EMBASE database searches were conducted. Additional search of relevant primary literature and review articles was also performed. A random effects model was used to estimate the PF ratio, mortality rate, mechanical ventilator days, and intensive care unit length of stay using Review Manager 5.4.1 software.
RESULTS
Of 1,128 studies, 15 articles were included in this meta-analysis. The prone position significantly improved the PF ratio compared with the supine position (mean difference, 79.26; 95% CI, 53.38 to 105.13). The prone position group had a statistically significant mortality benefit (risk ratio [RR], 0.48; 95% CI, 0.35 to 0.67). Although there was no significant difference in the intensive care unit length of stay, the prone position significantly decreased mechanical ventilator days (-2.59; 95% CI, -4.21 to -0.97). On systematic review, minor complications were frequent, especially facial edema. There were no differences in local wound complications.
CONCLUSIONS
The prone position has comparable complications to the supine position. With its benefits of increased oxygenation and decreased mortality, the prone position can be considered for trauma and surgical patients. A prospective multicenter study is warranted.
Topics: Humans; Respiration, Artificial; Prone Position; Prospective Studies; Intensive Care Units; Respiratory Distress Syndrome; Multicenter Studies as Topic
PubMed: 38093216
DOI: 10.1186/s12890-023-02805-w -
Journal of Neurosurgery. Spine Oct 2023Lateral lumbar interbody fusion including anterior-to-psoas oblique lumbar interbody fusion has conventionally relied on pedicle screw placement (PSP) for construct...
OBJECTIVE
Lateral lumbar interbody fusion including anterior-to-psoas oblique lumbar interbody fusion has conventionally relied on pedicle screw placement (PSP) for construct stabilization. Single-position surgery with lumbar interbody fusion in the lateral decubitus position with concomitant PSP has been associated with increased operative efficiency. What remains unclear is the accuracy of PSP with robotic guidance when compared with the more familiar prone patient positioning. The present study aimed to compare robot-assisted screw placement accuracy between patients with instrumentation placed in the prone and lateral positions.
METHODS
The authors identified all consecutive patients treated with interbody fusion and PSP in the prone or lateral position by a single surgeon between January 2019 and October 2022. All pedicle screws placed were analyzed using CT scans to determine appropriate positioning according to the Gertzbein-Robbins classification grading system (grade C or worse was considered as a radiographically significant breach). Multivariate logistic regression models were constructed to identify risk factors for the occurrence of a radiographically significant breach.
RESULTS
Eighty-nine consecutive patients (690 screws) were included, of whom 46 (477 screws) were treated in the prone position and 43 (213 screws) in the lateral decubitus position. There were fewer breaches in the prone (n = 13, 2.7%) than the lateral decubitus (n = 15, 7.0%) group (p = 0.012). Nine (1.9%) radiographically significant breaches occurred in the prone group compared with 10 (4.7%) in the lateral decubitus group (p = 0.019), for a prone versus lateral decubitus PSP accuracy rate of 98.1% versus 95.3%. There were no significant differences in BMI between prone versus lateral decubitus cohorts (30.1 vs 29.6) or patients with screw breach versus those without (31.2 vs 29.5). In multivariate models, the prone position was the only significant protective factor for screw accuracy; no other significant risk factors for screw breach were identified.
CONCLUSIONS
The present data suggest that pedicle screws placed with robotic assistance have higher placement accuracy in the prone position. Further studies will be needed to validate the accuracy of PSP in the lateral position as single-position surgery becomes more commonplace in the treatment of spinal disorders.
Topics: Humans; Robotics; Pedicle Screws; Robotic Surgical Procedures; Retrospective Studies; Lumbar Vertebrae; Tomography, X-Ray Computed; Surgeons; Spinal Fusion
PubMed: 37486864
DOI: 10.3171/2023.5.SPINE221296 -
PloS One 2023COVID-19 placed immense strain on healthcare systems, necessitating innovative responses to the surge of critically ill patients, particularly those requiring mechanical...
BACKGROUND
COVID-19 placed immense strain on healthcare systems, necessitating innovative responses to the surge of critically ill patients, particularly those requiring mechanical ventilation. In this report, we detail the establishment of a dedicated critical care prone positioning team at University Hospital Southampton in response to escalating demand for prone positioning during the initial wave of the pandemic.
METHODS
The formation of a prone positioning team involved meticulous planning and collaboration across disciplines to ensure safe and efficient manoeuvrers. A comprehensive training strategy, aligned with national guidelines, was implemented for approximately 550 staff members from a diverse background. We surveyed team members to gain insight to the lived experience.
RESULTS
A total of 78 full-time team members were recruited and successfully executed over 1200 manoeuvres over an eight-week period. Our survey suggests the majority felt valued and expressed pride and willingness to participate again should the need arise.
CONCLUSION
The rapid establishment and deployment of a dedicated prone positioning team may have contributed to both patient care and staff well-being. We provide insight and lessons that may be of value for future respiratory pandemics. Future work should explore objective clinical outcomes and long-term sustainability of such services.
Topics: Humans; COVID-19; SARS-CoV-2; Respiration, Artificial; Intensive Care Units; Delivery of Health Care; Prone Position
PubMed: 38153940
DOI: 10.1371/journal.pone.0296379 -
Beijing Da Xue Xue Bao. Yi Xue Ban =... Aug 2023To summarize the clinical manifestation, classification, and experience of surgical treatment of primary tethered cord syndrome (TCS) in adults.
OBJECTIVE
To summarize the clinical manifestation, classification, and experience of surgical treatment of primary tethered cord syndrome (TCS) in adults.
METHODS
The authors retrospectively analyzed a series of 171 adult patients with primary TCS who were surgically treated under microscope from March 2007 to October 2019. There were 61 males and 110 females whose ages were 18-65 years, with an average age of (39.02±11.81) years. Clinically, the patients presented with various neurological symptoms and signs including lower back and legs pain, reflex changes, sensory disturbances, muscle weakness, and sphincter problems. They were divided into 5 types by clinical manifestations and neuro-imaging features: (1) filum terminale traction in 69 cases, (2) split cord malformation in 21 cases, (3) myelomeningocele in 20 cases, (4) lipomyelomeningocele in 36 cases, and (5) dermal sinus traction in 25 cases. All the patients underwent microsurgery to untether the spinal cord. The patients kept prone position 7 days postoperatively. The Kirollos grading was used to evaluate the outcome of intraoperative untethering. The visual analogue scale (VAS) was used to evaluate the pain, the score of critical muscle strength was used to evaluate the lower extremity motor function, and the Japanese Orthopaedic Association (JOA) sphincter function score was used to evaluate the bladder function.
RESULTS
All of the 171 patients were treated with microsurgery to release the adhesion and cut off the filum terminalis. 61 cases of them received resection of the lesions according to the etiology. All the tethered spinal cord reached Kirollos grade Ⅰ untethering and the dural sac was reconstructed. Other than 5 patients had cerebrospinal fluid leakage and incision laceration and underwent re-suture, there was no surgical complication. The local pain was relieved, the lower limbs weakness or bowel and bladder dysfunction gradually recovered postoperatively. The period of follow-up ranged from 6 months to 12.5 years with an average of (5.62±2.31) years. The neurological function was improved in 153 cases and stable in 18 cases. There was no recurrence of tethered cord be found during the follow-up period.
CONCLUSION
The primary TCS in adulthood could be classified into 5 types by clinical manifestations and neuro-imaging features and surgical treatment should be undertaken in regard to the classifications including dissection and resection of the lesion detethering the spinal cord and reconstruction of the dura sac under microscope. The outcome of surgical treatment is satisfactory.
Topics: Male; Female; Humans; Adult; Middle Aged; Retrospective Studies; Treatment Outcome; Meningomyelocele; Neural Tube Defects; Pain
PubMed: 37534645
DOI: 10.19723/j.issn.1671-167X.2023.04.012 -
The Annals of Thoracic Surgery May 2024Prone positioning has become a standard therapy in acute respiratory distress syndrome to improve oxygenation and decrease mortality. However, little is known about...
BACKGROUND
Prone positioning has become a standard therapy in acute respiratory distress syndrome to improve oxygenation and decrease mortality. However, little is known about prone positioning in lung transplant recipients. This large, singe-center analysis investigated whether prone positioning improves gas exchange after lung transplantation.
METHODS
Clinical data of 583 patients were analyzed. Prone position was considered in case of impaired gas exchange Pao/fraction of oxygen in inhaled air (<250), signs of edema after lung transplantation, and/or evidence of reperfusion injury. Patients with hemodynamic instability or active bleeding were not proned. Impact of prone positioning (n = 165) on gas exchange, early outcome and survival were determined and compared with patients in supine positioning (n = 418).
RESULTS
Patients in prone position were younger, more likely to have interstitial lung disease, and had a higher lung allocation score. Patients were proned for a median of 19 hours (interquartile range,15-26) hours). They had significantly lower Pao/fraction of oxygen in inhaled air (227 ± 96 vs 303 ± 127 mm Hg, P = .004), and lower lung compliance (24.8 ± 9.1 mL/mbar vs 29.8 ± 9.7 mL/mbar, P < .001) immediately after lung transplantation. Both values significantly improved after prone positioning for 24 hours (Pao/fraction of oxygen ratio: 331 ± 91 mm Hg; lung compliance: 31.7 ± 20.2 mL/mbar). Survival at 90 days was similar between the 2 groups (93% vs 96%, P = .105).
CONCLUSIONS
Prone positioning led to a significant improvement in lung compliance and oxygenation after lung transplantation. Prospective studies are needed to confirm the benefit of prone positioning in lung transplantation.
Topics: Humans; Lung Transplantation; Prone Position; Male; Female; Middle Aged; Retrospective Studies; Adult; Patient Positioning; Pulmonary Gas Exchange; Treatment Outcome
PubMed: 37150273
DOI: 10.1016/j.athoracsur.2023.04.036