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BackgroundSub-Tenon's anaesthetic is effective and reliable in producing both akinesia and anaesthesia for cataract surgery. Our clinical experience indicates that it is sometimes necessary when absolute akinesia is required during surgery to augment the block with 1–2 ml of local anaesthetic. Hypothesis was that after first injection some of the volume injected may spill out and before second injection the effect of hyaluronidase has taken place and second volume injectate will have desired effect.MethodsA prospective, randomised, control trial in which patients were randomly allocated to one of two groups. In group 1, single injection of 5 ml of local anaesthetic was injected. In group 2, 3 ml of the same anaesthetic solution was injected followed by application of gentle orbital pressure for 2 minutes. A further 2 ml of the same anaesthetic solution was injected through the same conjunctival incision. Measurement of movement in four quadrants of eye was done by the surgeon at 3 and 6 minutes. Intraocular pressure, chemosis, and subconjuctival haemorrhage were also measured.ResultsSignificant differences at 3 minutes between groups for overall movement, medial, superior, and lateral quadrants occurred. At 6 minutes no significant group differences emerged for the overall movement or for any of four quadrants.ConclusionSingle injection of local anaesthesia for sub-Tenon's block with mixture of lignocaine with adrenaline, bupivacaine and hyaluronidase was found to be superior to provide akinesia of ocular muscles compared to divided dose given by two injections. No difference in groups in terms of haemorrhage, chemosis, patient's satisfaction and intraocular pressure was found.Trial registrationTrial registration no-ISRCTN73431052

Background & Objective: COVID 19 patients with severe respiratory failure may require prolonged mechanical ventilation. Placement of a tracheostomy tube often becomes necessary for such patients. The steps of tracheostomy procedure and post tracheostomy care of these patients can be classified as aerosol generating. We wish to highlight our modified technique to address these issues. Methods: We performed percutaneous dilation tracheostomy in three clinically challenging COVID-19 patients in our ICU and developed guidelines aiming to minimise aerosolisation during and after the tracheostomy procedure to safeguard healthcare workers. Results: Percutaneous tracheostomy was performed by a team of three experienced anaesthetists and an ICU nurse. Conclusion: The decision of surgical or percutaneous tracheostomy should be dependent on the experience of the tracheostomy performer, health-care worker safety, resource availability, and patient-centred care. We believe our modified strategic approach of brief bronchoscopy, minimum PEEP and gas flows and step-wise planned approach for PCDT offers an extra level of safety to healthcare workers. doi: https://doi.org/10.12669/pjms.36.7.3518 How to cite this:Khan E, Lal S, Hashmi J, Thomas J, Malik MA. Per-cutaneous dilatation tracheostomy (PCTD) in COVID-19 patients and peri-tracheostomy care: A case series and guidelines. Pak J Med Sci. 2020;36(7):---------.   doi: https://doi.org/10.12669/pjms.36.7.3518 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.