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OBJECTIVE Spinal CSF leaks cause spontaneous intracranial hypotension (SIH). Surgical closure of spinal CSF leaks is the treatment of choice for persisting leaks. Surgical approaches vary, and there are no studies in which minimally invasive techniques were used. In this study, the authors aimed to detail the safety and feasibility of minimally invasive microsurgical sealing of spinal CSF leaks using nonexpandable tubular retractors. METHODS Consecutive patients with SIH and a confirmed spinal CSF leak treated at a single institution between April 2019 and December 2020 were included in the study. Surgery was performed via a dorsal 2.5-cm skin incision using nonexpandable tubular retractors and a tailored interlaminar fenestration and, if needed, a transdural approach. The primary outcome was successful sealing of the dura, and the secondary outcome was the occurrence of complications. RESULTS Fifty-eight patients, 65.5% of whom were female (median age 46 years [IQR 36–55 years]), with 38 ventral leaks, 17 lateral leaks, and 2 CSF venous fistulas were included. In 56 (96.6%) patients, the leak could be closed, and in 2 (3.4%) patients the leak was missed because of misinterpretation of the imaging studies. One of these patients underwent successful reoperation, and the other patient decided to undergo surgery at another institution. Two other patients had to undergo reoperation because of insufficient closure and a persisting leak. The rate of permanent neurological deficit was 1.7%, the revision rate for a persisting or recurring leak was 3.4%, and the overall revision rate was 10.3%. The rate of successful sealing during the primary closure attempt was 96.6% and 3.4% patients needed a secondary attempt. Clinical short-term outcome at discharge was unchanged in 14 patients and improved in 25 patients, and 19 patients had signs of rebound intracranial hypertension. CONCLUSIONS Minimally invasive surgery with tubular retractors and a tailored interlaminar fenestration and, if needed, a transdural approach is safe and effective for the treatment of spinal CSF leaks. The authors suggest performing a minimally invasive closure of spinal CSF leaks in specialized centers.

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BACKGROUND: Worldwide, the COVID-19 pandemic has a significant impact on daily life. First studies describe a negative impact of pandemic stressors even on individuals without previous mental illnesses. The home lockdown and the shutdown of pain clinics make it difficult for all patients to get the healthcare they need. OBJECTIVES: The aim of this study was to investigate to what extent patients with chronic pain felt affected by the pandemic and its consequences on pain treatments, focussing on the beginning of the outbreak. STUDY DESIGN: A prospective noninterventional study. SETTING: Medical University Center . METHODS: One-hundred and forty-nine patients, suffering from chronic pain, treated at a large German interdisciplinary pain center, were studied over a period of 2 months at the beginning of the pandemic. Data from patient charts and questionnaires were evaluated. Patients were asked about postponements or cancellations of pain therapy, the possible effect on pain levels, depression, anxiety and stress, and the impact of intensified hygiene measures. Results were compared to those from standardized and validated questionnaires from the same patients (German version of the depression, anxiety, and stress scale = DASS) at the time of the first contact in the pain clinic. RESULTS: Eighty-four (56.4%) patients reported cancelled or postponed treatments during the pandemic. Those chronic pain patients with delayed or cancelled treatments reported significantly more pain and psychological distress. The delay or discontinuation of treatments resulted in a deterioration of symptoms. From the patients’ point of view this deterioration was unrelated to the timing of treatment and not secondary to increased hygiene measures. In both groups, patients showed a significant amelioration of the DASS values compared to the values they had at the beginning of treatment, despite the negative effects of the COVID-19 pandemic on care structures. The majority of the patients do not think that the quality of pain treatment was significantly affected by the intensified hygiene requirements. LIMITATIONS: The limitations of the study are the small number of patients because of the limitation to a short period of time at the beginning of the pandemic and the return rate of 40.2% of the study consents. CONCLUSIONS: Even in the event of a pandemic-related restriction of the care structures, patients with chronic pain benefit from pain therapy. Limitations such as the increased hygiene measures caused by the pandemic were not considered detrimental to the therapeutic measures. KEY WORDS: COVID-19 pandemic, hygiene measures, chronic pain, anxiety, depression, stress