Using Ultrasound to Determine Optimal Location for Needle Decompression of Tension Pneumothorax: A Pilot Study.

BACKGROUND: Chest injury can result in life-threatening complications like tension pneumothorax, in which rapid deterioration can occur without decompression. Traditionally, the second intercostal space (ICS) along the mid-clavicular line is taught as the site for decompression. However, this has been questioned due to high rates of treatment failure. The fifth ICS on the mid-axillary line (MAL) is hypothesized to have a shorter distance from skin to pleura based on recent studies. OBJECTIVE: The purpose of this study was to use point-of-care ultrasound (POCUS) to compare chest wall thickness at these two locations. The primary objective was to evaluate the distance from skin to pleura line at the second ICS along the mid-clavicular line and the fifth ICS along the MAL. Secondarily, we aimed to evaluate inter-rater reliability of the two assessments. METHODS: This was a single-center, observational, pilot study. POCUS was performed using a linear transducer. Measurements of skin to pleura line were obtained at the right second ICS and fifth ICS. These measurements were then repeated by a blinded second ultrasonographer. Intraclass correlations (ICCs) for each measurement site were calculated to determine the inter-rater reliability. RESULTS: Ninety-three percent of volunteers had a smaller chest wall distance at the fifth ICS-MAL. The median distance at the second and fifth ICS was 2.28 cm and 1.80 cm. The ICC for second ICS was 0.75 (95% CI 0.54-0.87), and 0.90 for the fifth ICS (95% CI 0.81-0.95), both indicating good reliability. CONCLUSIONS: The data support that patients have a smaller chest wall distance at the fifth ICS vs. the second ICS. We support performing needle decompression at the fifth ICS and believe POCUS can be used to determine the optimal location for decompression.

Acute Angle-Closure Glaucoma Secondary to Vitreous Hemorrhage Diagnosed with the Aid of Point-of-Care Ultrasound.

BACKGROUND: Acute angle-closure glaucoma (AACG) caused by vitreous hemorrhage is a rare complication of intravitreal injection that often leads to permanent vision loss without prompt treatment. CASE REPORT: This is a case of vitreous hemorrhage with secondary AACG in an 80-year-old man who presented to the emergency department (ED) with pain and vision loss in his left eye after undergoing intravitreal injection to treat exudative macular degeneration. The diagnosis was made with the use of point-of-care ultrasound after intraocular pressure (IOP) was found to be significantly elevated in the left eye. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: Emergency physicians should have a high level of suspicion for AACG in patients who are diagnosed with a vitreous hemorrhage after intravitreal injection and should immediately measure IOP for elevation upon presentation to the ED.

Use of Point-of-Care Ultrasound to Facilitate Guidance and Intrauterine Placement of a Foley Urinary Catheter to Tamponade Life-Threatening Postprocedure Hemorrhage Caused by Disseminated Intravascular Coagulation.

BACKGROUND: Severe vaginal hemorrhage caused by disseminated intravascular coagulation (DIC) after dilation and evacuation is a rare but life-threatening situation that can be difficult to manage. Obtaining hemostasis in such a patient with heavy vaginal bleeding secondary to DIC can be difficult. One technique involves the use of a urinary bladder catheter inserted into the uterus that is inflated to apply pressure on the endometrium, allowing for tamponade of the bleeding. CASE REPORT: A 36-year-old female gravida 2 para 0 at 21 weeks' gestation presented to the emergency department after being transferred from another facility for a higher level of care available at our facility, after a dilation and evacuation procedure that was indicated because of intrauterine fetal demise. The physical examination was significant for an ill-appearing female with active heavy vaginal bleeding. Resuscitation was initiated with packed red blood cells, cryoprecipitate, and platelets. Because of her thrombocytopenia, the development of DIC was suspected. Point-of-care ultrasound (POCUS) was performed and showed a thickened endometrial stripe with evidence of multiple anechoic foci, which were thought to represent intrauterine clots. To tamponade the bleeding, a 30-cc standard Foley urinary bladder catheter was placed into the uterus, using POCUS for guidance, to attempt to induce hemostasis via tamponade of the bleeding after inflation of the catheter balloon. Placement of an intrauterine urinary catheter to enable tamponade can be useful for the management of uncontrolled hemorrhage, but can be difficult to accomplish without use of POCUS for guidance. POCUS enabled us to accomplish accurate intrauterine placement of the urinary catheter and confirmation of a properly placed catheter balloon within the uterus. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: Menorrhagia in the emergency department can be difficult to manage, especially in the setting of DIC. Placement of an intrauterine urinary catheter can be useful in management but may be difficult for the inexperienced provider. POCUS can be used to guide the catheter into place and confirm the location once the balloon is inflated.