The increasing number of confirmed COVID-19 cases emphasizes the importance of preventive measures among healthcare workers (HCWs) [1]. The field of dermatology is not exempt from this global issue. Although elective procedures are already suspended, some continued to perform lasers and energy-based device (EBD) treatments during the initial period of the pandemic. Others may not have been aware of the possibility of disease transmission while performing the said procedures. There is a high chance of contracting or even transmitting the disease to and from the patient because of the close distance maintained. Patients can be categorized into two groups: those with severe symptoms documented with a COVID-19 diagnosis and those with undocumented infections which is estimated to cause 86.2% of all cases [2].

Although coronaviruses are isolated from human epithelial cells of the upper or lower respiratory tract, viral shedding in plasma or serum is also common [3]. Therefore, there is a theoretical risk of transmission of coronaviruses through the blood products of infected individuals. As there is an increasing number of asymptomatic patients, dermatologists should be fully aware of the potential risk of transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) while performing laser and EBD procedures, and geared with complete biosafety protection.

Preventive measures in dermatology practice

The principal preventive initiatives for COVID-19 include administrative guidelines for patients and staff, correct usage of personal protective equipment (PPE), and engineering measures.

Administrative measures for patients

All non-emergency dermatology consults and procedures must be rescheduled. Screening patients and cancelling appointments only for those with fever is not enough because of the known viral shedding during asymptomatic or pre-symptomatic period [4]. Given the pandemic situation and asymptomatic shedding of SARS-CoV-2, offering universal face masks and alcohol-based handrubs (ABHRs) to all patients should be considered. Routine postoperative visits must likewise be suspended and advised teledermatology instead (Table 1).

Table 1 Checklist of administrative measures for patients during the COVID-19 pandemic
Full size table

Administrative measures for staff

Recommendations of administrative measures for staff are summarized in Table 2. Hand hygiene is considered the most critical measure in reducing the risk of transmission [5]. As previously mentioned, SARS-CoV-2 can be inactivated through protein denaturation by using ABHRs, given without visible soiling. If visible soiling is present, mechanical removal and disinfection by hand washing with antiseptic soap is preferred. The WHO recommends 80% ethanol (v/v) or 75% isopropanol (v/v) as these were previously found to have virucidal action against SARS-CoV and Middle East Respiratory Syndrome coronavirus (MERS-CoV). The USCDC, on the other hand, maintains that the use of ABHR containing 60% ethanol or 70% isopropanol is sufficient. A combination of the “My 5 Moments for Hand Hygiene” protocol by the WHO as well as the use of the “Six-Step Hand-Hygiene Technique” ensures adequate coverage of all hand skin surfaces at key moments in patient care.

Table 2 Recommendation of administrative measures for staff
Full size table

Personal protective equipment

PPEs are the final line of protection for HCWs especially during the time of community transmission. For urgent procedures wherein laser and/or dermatologic surgeries are the primary treatment options, full protective gear must be worn and properly disposed of after. Goggles for eye protection are indicated at all times to prevent inoculation of the virus on the conjunctival surface.

The possibility of exposure to COVID-19 exists for operating personnel during procedures, especially with ablative lasers, lasers producing tissue spatter (Q-switched and picosecond lasers), and electrosurgery. According to the WHO, a healthy HCW needs to wear a face mask if he or she is taking care of a person with suspected COVID-19 infection. [6] However, mask-wearing during all patient contact points is suggested as HCWs may be unknowingly exposed to undocumented infected patients and asymptomatic carriers. Regarding source control, covering the mouth and nose of a patient with a facemask during laser and EBD procedures is recommended unless contraindicated.

N95 or class 2 filtering face-piece (FFP2) respirators are recommended when performing aerosol-generating procedures and to use medical masks when providing care to suspected or confirmed cases [7, 8]. To avoid iatrogenic spread of viral particles from a used facemask, it is important to follow the recommendation of the USCDC on how to properly put on and take off a disposable respirator. To reiterate, wearing a protective mask will not protect HCWs against COVID-19 if it is not accompanied by meticulous hand hygiene, eye protection, gloves, and a gown. Long-sleeved water-resistant gowns or a single-use plastic apron worn over a non-water-resistant gown must be used at all times (Table 2).

Engineering measures: Environment care of clinic

Machine surfaces and dermatology beds must be covered with a plastic wrap for ease of cleaning and disinfection. The procedure room must be kept physically clean and air-dried to reduce the viability of SARS-CoV-2. At room temperature, the virus remains viable from 2 h up to 9 days [9]. Ultraviolet (UV)-C irradiation has been widely used because of its germicidal effects by inhibiting cellular replication [10]. Due to this characteristic, its use in inactivating coronaviruses was initially explored during the severe acute respiratory syndrome (SARS) outbreak back in 2003 [11]. While there is a potential in using UV-C lamps for sterilization during this pandemic, no studies have been published to date on its ability to destroy the novel coronavirus.

Engineering measures: Exhaust ventilation procedures

Surgical smoke is produced by thermal destruction of target tissue and consists of 95% vapor and 5% particulate matter (infectious and non-infectious). It has been found that viral diseases such as genital warts caused by the human papillomavirus (HPV) can be transmitted via carbon dioxide (CO2) laser-generated plumes to produce nasopharyngeal lesions. Smoke evacuators are recommended for ablative laser procedures and electrosurgery. Importantly, the nozzle of the smoke evacuator hose must be kept less than an inch away from the source of emission to ensure efficient plume evacuation [12].

Conclusions

The practice of dermatology carries an equal risk of exposure to SARS-CoV-2 to both patients and HCWs. We are facing many unknowns, and thus, careful monitoring and further studies must be continued. At the peak of this pandemic, it must be emphasized that all non-emergent cases be rescheduled or deferred to teledermatology consults. If absolutely necessary, dermatologists are urged to abide by the consensus guidelines set forth by the WHO and of local dermatological societies to minimize potential risks of transmission.