Can receiving HSCT care at home reduce the risk of GVHD and COVID-19?

Dr. Henry: So let’s then take it through what happens. Say I am a patient with myeloma. I’ve had various therapies, and it’s time for me to get an autotransplant, let’s say. And so I need to do a couple of things. I need to get my stem cells collected. I need to then get my high-dose [conditioning] therapy, and then follows the stem cell therapy reinfusion. So can you take me through each step? Where is that done?

Dr. Sung: Absolutely. So the collection will occur in the outpatient setting, typically after mobilization with G-CSF [granulocyte colony–stimulating factor] and/or plerixafor. That will occur in our outpatient clinic with one of our leukapheresis machines. And the patient will then return to that same outpatient clinic, which is the same building, the same facility as the hospital, to receive melphalan conditioning. And then, following conditioning, about 24 hours after, day 0, that’s the day of their stem cell transplant infusion, which we do in the hospital setting just because of the potential for reactions associated with that.

But everything after that, from day 1 onwards, we try to keep them at home. And as I said, they will stay in their home. One of our nurse practitioners or physician assistants will visit them in the morning, do the assessment and draw the labs. And nurses will return in the afternoon to deliver any supportive care that they need.
 

Dr. Henry: So let’s define “home.” So I’m a Philadelphia resident and I say to you, Dr. Sung, I want to go home. You say, well, Philadelphia is too far. What is close enough and not too far, when you say home?

Dr. Sung: Absolutely. So when we originally conceived the program, we focused on patients who lived within an hour of our transplant center. And in part, that was because, as you know, unfortunately, things can sometimes go wrong during transplant. One of the most concerning ones is infections. And if a patient were to develop a neutropenic fever, we would want them to be seen as urgently as possible within an hour. And that’s where our limitation comes from.

So for our patients who live more than an hour away, those are the ones that we will have relocate to temporary lodging near our transplant center. And we’ve worked with several facilities in the area that have clean, furnished units that are available for rent. Many insurances also include lodging benefits for patients during stem cell transplant, recognizing this need. And historically, those [patients] were not considered part of our transplant patient cohorts.

I have not mentioned, but we initially did this in a phase 1 study, and we’re now studying it in a series of randomized, phase 2 studies that I can go into detail later on. And because they were not necessarily in their home, but a temporary lodging environment, those patients who relocated to Durham were not eligible for a home transplant study.

However, in the setting of the COVID-19 pandemic, we’ve actually pivoted our program in many ways. Specifically, if you think about a patient who’s coming into contact with the medical system, they come to the hospital, they meet someone at the door who is screening them for COVID-19. They see someone who checks them in at the front desk. A medical assistant takes them in the back. Someone calls their labs and phlebotomy. They may encounter other patients and environmental services, other individuals in the setting. You’re talking about dozens of different encounters. Who knows how many surfaces that potentially someone with COVID-19 has coughed on or contaminated?

And in contrast, you have house calls, which even if they are located in the temporary lodging, that’s just one or two individuals going into their living environment. They’re not encountering any different surfaces. And so, in the setting of COVID-19, we felt that this platform had the potential to help protect all our transplant patients who are among the most vulnerable patients, the most immunocompromised patients, and so we expanded our program to include those individuals as well.