All India Ophthalmological Society - Oculoplastics Association of India consensus statement on preferred practices in oculoplasty and lacrimal surgery during the COVID-19 pandemic



## I. definitions
a. Infectious Aerosols: These are defined as particles suspended in gas, less than 100 m and can be respired. Aerosols between 10-100 m are usually deposited in the upper respiratory tract, whereas less than 10 m can penetrate deep into the lungsb. AGP (Aerosol Generating Procedures): Medical procedures or interventions that has the potential to generate aerosols and expose the healthcare worker to the pathogens. Examples are endotracheal intubation, mechanical ventilation, suctioning of body fluids, etc.c. PPE (Personal Protective Equipment): PPE refers to the equipment worn to minimize hazards of exposure to the pathogens and includes protective clothing, masks, goggles, face masks, face shields, helmets with or without respirators d. FFP (Filtering Face Piece mask): FFP or simply called a respirator is a protective face mask known to filter dust particles and viruses. They are of three types based on the filtration capacity and inward leakage. The FFP2 (N-95) or FFP3 masks are commonly recommended for the virusese. PAPR (Powered Air Purifying Respirators): PAPR or positive pressure masks are a specialized respirator designed to filter contaminated air. They are considered superior to N-95 mask; however, its use is limited by the cost and availability factorsf. Ideal PPE (Type A): This would comprise of Hazmat suit + N-95 mask + Visor + Shoe coverg. Minimum PPE (Type B): This would comprise of Surgical gown + N-95 mask + Visor + Shoe cover + cap +/-monkey hood or cap +/-plastic apron +/-goggles/surgical loupes.II. COVID screening in practices When resuming services, it would be ideal to screen every patient who comes for a consult. An easy way to perform it during demanding situations like a pandemic is the use of a simple questionnaire []. In addition, make a note of the patient's residential address and the colour code of the zone of the location. This questionnaire would then form the basis for pre-surgical screening subsequently []. The use of these two simple methods would allow the surgeon to make decisions with regards to proceeding with clinical examination, surgery where needed, and the degree of logistical needs.
III. General pre-operative, intra-operative and post-operative guidelines for SARS-Cov-2 positive or suspected patients 1. PPE for all medical and non-medical personnel involved in the surgery (at least minimum PPE described as above)2. Only minimum necessary anaesthetic, surgical and allied health personnel should be present inside the operating room3. Use of aerosol protection devices is encouraged during intubation and extubation to limit spread of aerosols away from the patient. An oxygen mask/aerosol protection device should be placed over the face after the tube is removed to mitigate aerosolization with coughing4. Non-anaesthetic manpower should be outside the operating room during intubation and extubation5. The surgical operating team should be outside the door ideally for 20 minutes following intubation before entering the operating theatre. The team may then enter with appropriate PPE (N95 or PAPR)6. Povidine Iodine (PVP-I) disinfection for endonasal lacrimal and orbital procedures: PVP-I has viricidal activity on coronaviruses related to SARS-Cov-2. Studies suggest 0.5% PVP-I preferably in atomised form for disinfection of nasal mucosa and nasopharynyx for both the medical personnel involved in surgery and the patient. Alternatively, 2% PVP-I oral solution can be used for oral mucosal dis-infection of medical personnel before surgery and 5% PVP-I solution in the case of the patient. The method of instillation depends on the availability, region and institution where surgery is being performed7. An interval of 20-30 minutes between cases is essential during the time of this crisis to give enough time for aerosols generated during the previous procedure to clear. The exact interval timing will depend on operating theatre air exchange rates-which should be decided by individual hospitals.IV.

## Role of respirators-use of n95 respirators vs powered air-purifying respirators (paprs)
There is enough evidence in literature of superior protection of N95 respirators and PAPRs compared to regular 3-ply face masks especially against Influenza virus and SARS-CoV (the virus responsible for the previous SARS outbreak) making them indispensable during this present pandemicIn one significant comparative study, N95 respirators had 30 times more protective factor than the regular 3-ply masks.For emergency proceduresPlease score the above sheet, but can go ahead with surgery with full PPE in designated operating rooms. A pre or post-operative consultation from an infectious disease (ID) specialist or General Physician. It is also advised that nasopharyngeal swab/ blood be sent preferably for COVID-19 testing* pre-operatively. Operating team may not be able to wait for results before proceeding with surgery.
For semi urgent/elective procedures 1. If the answer to all the questions above is NO, then may proceed with surgery with preferably testing for COVID-19.* 2. If the answer to any of the above is YES -please consult infectious diseases specialist before proceeding.
*Either RT-PCR of nasopharyngeal swab OR protective serum IgG level. Experiences from Wuhan, China and Northern Italy suggest that PAPR (FFP3) were deemed to have accorded better protection than N95 respirators (FFP2) and helped in keeping infection rates among medical personnel in control.There are issues of comfort and physiological effects on medical personnel using N95 masks. Earlier studies have reported decreased concentrations of inhaled oxygen (O2) and increased concentrations of inhaled carbon dioxide (CO2) associated with use of N95 respirators for long periods.With expected prolonged mask wearing, long term health implications of the medical personnel needs be carefully considered. In a long-term study, the subjects consistently reported headache, dizziness, feeling tired and communication obstacles.In many surgeries, mask wearing time may be significantly longer and there may be increased O2 utilisation rate than in experimental settings. These issues are obviated by PAPRs making them the respirators of choice. Though PAPRs are preferred over N95 respirators, considering the cost factor involved and availability of PAPRs, the choice of respirators may be left to the individual institutions, hospitals and practices in the present time. Full Face-shield Respirators with better air ventilation and N95 specifications can be considered as an alternative to N95 respirators. There are suggestions for disinfection of respirators to conserve expensive respirators in this period of crisis. Ultraviolet irradiation, atomised hydrogen peroxide and moist heat are the most promising decontamination procedures, but there is not enough literature to support its specific efficacy against SARS-CoV-2. Reusing respirators after disinfection may reduce its efficacy over time.V. General guidelines for oculoplastic surgery 1. Avoid general anaesthesia (intubation, extubation) whenever possible2. Avoid monopolar cautery for cutting/coagulation3. Use cutting blade for skin and mucosal incisions whenever possible4. Use bipolar cautery for haemostasis in lowest power setting5. Practise minimal handling of tissues especially mucosal surfaces6. Avoid repeated irrigation and suctioning of tissues7. Avoid/minimize drills, oscillating osteotomes and other powered instruments8. Consider closed reduction if fracture is stable for zygomatico-maxillary complex (ZMC) fractures. Avoid intra-oral incision, if two-point fixation (rim and ZF) is sufficient for stabilization9. Self-drilling screws preferred over self-tapping ones that require pre-drilling10. An optional use of a smoke and suction evacuator device having fluid suction high-efficiency particulate air (HEPA) filter compartment and an ultra-low penetrating air (ULPA) efficiency rating will keep the aerosol and smoke dispersion in check11. To plan orbital decompression surgery avoiding endo-nasal endoscopic approach and only utilising an orbital approach, so that there is minimal to no breach of sinus mucosa. The operating surgeon can even consider-in a known COVID-19 positive patient-a single wall, aggressive lateral wall decompression as a temporising procedure to protect the optic nerve or/and reduce orbital congestion. The surgeon can plan for a more complete decompression at a later date.VI. Donning and doffing of complete and minimum PPEThe decision to use either complete (Type A) and ideal PPE versus minimum PPE (Type B) depends upon the nature of the risk and availability of the protective suits. The donning and doffing techniques of each type is described.

## Vii. classification of clinical and surgical procedures [14,17,18,22]
This classification offers a broad time line but is not sacrosanct and may be modified based on individual or institutional discretion.
Level A -Emergency/Urgency -The need to operate within 4-72 hours.
Level B -May be deferred for up to 4 weeks with or without conservative management.
Level C -May be deferred beyond 6 weeks without adversely affecting the outcomes.

## Viii. risk stratification for oculoplastic surgeries
The risk classifications of orbital surgeries are shown in, eyelid and facial procedures inand that of Ocular Oncology inand lacrimal procedures in. In addition, certain specifics of eyelids, orbital and lacrimal malignancies are dealt within the respective risk stratification tables.

## Ix. lacrimal surgeries
Unlike other oculoplastic surgeries, lacrimal procedures involves various interventions into the nasal cavity which enhances the risks for a lacrimal surgeon. Hence it requires a brief discussion on the intricacies of clinical examinations like lacrimal irrigation and nasal endoscopy and common surgical procedures.

## A. lacrimal irrigation
This is a basic clinical examination in any ophthalmic clinic. However, it is potentially an aerosol generating procedure -especially in the setting of an obstructed lacrimal drainage system. This can be compounded by the controversy of presence of virus in the tears.The previous guideline was to avoid lacrimal irrigation and instead rely more on Fluorescein dye disappearance test (FDDT).In the immediate aftermath of lockdown, this view may not be entirely valid. One, because of inherent sensitivity and specificity of the test and second, FDDT is neither confirmatory test for any lacrimal obstruction nor does it reflect the level of obstruction. Hence decisions to operate cannot be confidently taken. Irrigation, when necessary, should be performed ideally with at least a minimum PPE and preferably with a low capacity syringe (1 cc) and straight 25 or 27 G cannulas. This is to reduce the force generated to minimum and allow a more controlled and slower rate of fluid flow. This is likely to reduce the generation of aerosols. Since a straight canula is used on a slim syringe, the same canula can also be used to assess the level of canalicular obstruction if needed. The usual second intervention of using a probe to assess the level of obstruction can be avoided.

## B. nasal endoscopy
Routine nasal endoscopies prior to any lacrimal surgery is best avoided while the pandemic lasts. Yet it may be needed for a subset of patients, for example, in congenital dacryocystocele with signs of airway compromise, to assess intranasal cyst or in cases of acute lacrimal drainage trauma or malignancies. It is to be borne in mind that the nasal tissues harbour high viral load with higher risk for the examining surgeon. This can be complicated by an unexpected sneeze reflex that it may occasionally induce. In addition, since the SARS-CoV-2 virus can be stable on the surfaces for long periods,effective disinfection of the telescope before using it for another patient can be a dilemma. While disposable endoscopes can be an alternative, it is not an economically feasible option in the developing world. When performing nasal endoscopy, carefully decongest and anesthetize the nose. It is preferable to avoid the use of atomizers and suctions. Perform the procedure in a quick yet controlled manner, preferably with PPE.

## C. stent extubation
Stent extubation is not an emergency. It may be warranted on a priority basis where clinical examination reveals complications like internal common opening threatening tubal granulomas. Endoscopy route is the quickest to remove it. In the presence of concerns for endoscopy either because of logistic reasons or patient related factors, a careful external approach removal can be an alternative. However, for obvious reasons, there is no scope for its removal by sneezing manoeuvre as is the practice in some centres.

## D. probing for congenital nasolacrimal obstruction (cnldo)
Routine probing is to be avoided till the decline of the pandemic. However, exceptional circumstances like congenital dacryocystocele or dacryocystopyocele may require endoscopic decompression. In such an eventuality, all precautions for a surgery as mentioned earlier including PPE is warranted.

## E. dacryocystorhinostomy
Routine dacryocystorhinostomy (DCR) by any approach is to be avoided till the decline of the pandemic. However, there may be certain indications that come under level A surgical classification may require it, for example recurrent lacrimal abscess with extraocular complications in younger individuals. The surgery would mandate a pre-operative testing for COVID-19 as described earlier and PPE. If an urgent DCR is planned, it is preferable to use the external route, use blades for incisions, avoid cautery, powered instruments like drills or ultrasonic aspirators and suction (use gauze instead). One needs to be very careful while fashioning the nasal mucosal flap. Use a direct decongestion on the nasal mucosa before incising it. Avoid suction here as it is a potentially aerosol generating step. A direct pack compression is preferable in case of troublesome bleeding. Use at least a PPE at minimum during the post-operative follow-ups of these patients.

## F. dacryocystectomy
Dacryocystectomy is comparatively a safer procedure than a DCR and mandates all the general precautions as elucidated above. It has certain absolute indications in the present eraand any other indications need to be weighed against the risk of persistent epiphora. For all extended DCTs, PPE is mandatory.

# X. conclusion
While all attempts have been made to make this a comprehensive document, these guidelines must be put into practice taking into consideration the rules and regulations laid down by the local state/municipal authorities. As a subspecialty, oculoplastic surgery will come out of this crisis but not without fundamental changes to the way we practice, and the new normal may be completely different. In reality, the bulk of surgeries in ophthalmic plastic surgery are elective surgeries, and it is evident that resumption of elective and aesthetic procedures is not on the cards in the immediate foreseeable future. How much of these changes that our practice has undergone will become permanent remains to be seen; and the guidelines presented in this document are likely to change over time. Until an effective treatment against COVID-19 or a vaccine is developed, it is hoped that this set of guidelines can help oculoplastic surgeons in resuming clinical duties and serving society at large in an optimal and secure way, without compromising on both their safety as well as their patients.

## Financial

## Financial support and sponsorship
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## Conflicts of interest
There are no conflicts of interest.

## Disclaimer
The authors of this document would like to declare that these guidelines are based on the information issued by various relevant organizations, and State and Central Governments as on the date of their release. These guidelines are provided for informational and educational purposes only. Adherence to any recommendations included in this document may not ensure a successful outcome in every situation. Furthermore, the recommendations contained in this document should not be interpreted as setting a standard of care or be deemed inclusive of all proper methods of care nor exclusive of other methods of care reasonably directed to obtaining the same results. These guidelines reflect the best available information at the time the document was prepared. The results of future studies may require revisions to the recommendations to reflect new data. The guidelines do not replace or override existing national/regional/ local statutory requirements. The guidelines are to be tempered with the regional, local and individual hospital guidelines and expertise. The ultimate judgment regarding the propriety of any specific therapy must be made by the physician and the patient considering all the circumstances presented by the individual patient, and the known variability and biological behavior of the medical condition. This expert panel does not warrant the accuracy or completeness of the guidance and assumes no responsibility for any injury or damage to persons or property arising out of or related to any use of this guidance or for any errors or omissions. We will not be a party to/for medico legal implications arising out of following or not following these recommendations.